Table A. 



COMPARATIVE TABLE OF ALL KNOWN EXTKA- AFRICAN SPECIES OF THE GENUS BENHAMIA. 



To face page 126. 



Habitat. 



nana n. sp. 



mexicana Bosa. 



Silt 



Jf umber somites . 



First dorsal pore. 

 Prostomium 



San Bias, Territory of Te- Durango, Mexico, 2565 

 pic, Mexico, at sea level. metres above the sea level. 

 Strictly tropical form. Temperate form. 



20 to .TO mm. 



30 mm. 



Ctitellum . . . 

 Peiiial seta. 



110. Skin strongly pig- 120. Skin not pigmented, 

 mented iu anterior so- 

 mites. I 



Very swollen and overlap- Divides the buccal somite 



ping. completely (?) 



Complete in the central Complete, xiii-xxi. 

 somites, xiii-x\. 



Common seta. 



Oviducal pore. 



The largest with 12 or 

 more strong bristles. 



Distance between the dor- 

 sal couples about equal 

 to that between the ven- 

 tral conples. 



Two pores, open in front 

 of set* 1 and 2. 



Prostate pores I Not on papillse. 



Pharynx . 

 Qiiiarda 





Calciferout diverticula 



Sperm-sacs . . 

 Spermducts 



Situated very far forward. 

 In viii and ix. 



Nfphridia. 



Spermalheca 



Two pairs in xv and xvi. 



In X and xi. 



Thicker in xviii, xvii and 

 xvi. 



In three rows on each side 

 of the median line. The 

 posterior ones with ccelo- 

 mic cell - mantle. The 

 uephridia iu each somite 

 of about the same size. 

 The nephridia on each 

 side about equidistant, 

 but the dorsal nephridia 

 are much further apart 

 from the dorsal median 

 line than from the lateral 

 nephridia. Nephridia a 

 open iu front of 3 and 4. 



Basal part with one plain 

 diverticulum. Apical 

 part warty and irregular. 



1)lphlosole.. 

 Color 



Very large; begins in xviii. 



Not ornamented (Bosa). 

 According to Ude, faintly 

 oruameuted with 6 thick- 

 enings. 



Setse 3 and 4 further apart 

 than I and 2. 



Two pores in front of 

 setip 1 and 2 on small 

 papilliB, which touch with 

 their bases. 



Not on papillffl. 



In viii and ix. 



Three pairs iu xv, xvi and 

 xvii. 



In X and xi. 



Not enlarged ( ?) 



In three rows on either 

 side, probably all of the 

 same size. Nephridia a 

 correspond to setm 1 and 

 2. The nephridia on each 

 side are equidistant, and 

 the dorsal nephridia c are 

 as equidistant from the 

 dorsal median line as 

 from the lateral nephridia 

 /). With cielomic mantle. 



Bolavi Michaelsen. 



Hamburg, at Bergedorf, 

 imported, and Venezuela 



(Ude). 



40 to 60 mm. 

 97. 



Does not divide buccal 

 segment. 



Incomplete iu all seg- 

 ments, xiii-xx. 



The larger seta with five 

 (or eight B) notches on 

 apex ; the smaller is spoon- 

 like and slightly forked, 

 with no denticulation. 



Those on posterior seg- 

 ments larger. The couples 

 equidistant. 



One single pore on a large 

 median papilla in xiv. 



Never elevated. 



Not forward. 

 Two in somite vii. 



Three pairs in xv, xvi and 

 xvii. 



One pair only iu xi. 



In three rows on either 

 side; the anterior ones 

 have no cielomic mantle 

 like those posterior to 

 the male pore. The two 

 lateral uephridia of equal 

 size; the ventral uephrid- 

 ium is much narrower, 

 but furnished with two 

 separate c<tlomic man- 

 tles, the inner of which is 

 smallest. The nephridia 

 are more separated than 

 in B. palmicola. 



palviicola n. subap. 



Baja California, Cape Re- 

 gion and Topic, Mexico 

 1000 and 4000 feet. 



•50 mm. 



90. Not pigmented. 



iv-v. 



Not very pointed. 



Incomplete iu all somites, 

 xiii-xx. 



The larger seta with four 

 notches, the smaller one 

 spoon-like at apex and 

 forked . 



About equal distance be- 

 tween the dorsal and ven- 

 tral as between the ven- 

 tral couples. 



One pore on 

 media papilla. 



Not on papilliB, 



a central 



papiUata n. sp. 

 Tepic, Mexico, 4000 feet. 



50 to 70 mm. 



125 (largest specimen). 



Divides parti j' buccal 

 segment; swollen. 



Complete, but ventrally 

 thin, xiii-xx. 



Larger with eight faint 

 notches; smaller with 

 a hair -like sigmoid 

 point. 



Inner couples wauting 

 iu xviii, equidistant. 



Two closely approxi- 

 mated pores on a me- 

 dian papilla. 



octonephra Bosa. 

 Paragiiay. 



20 to 40 mm. 

 85 to 95. 



maiayana Horst. 

 Malay Archipelago. 



20 to 30 mm . 



95. Skin without pig- 

 mentation. 



v-vi or vi-vii. 



Continued into the buc- 

 cal segment. 



xiiitoxx, incomplete be- | Complete iu the anterior, 

 tween the ventral setm. incomplete in the pos- 

 terior somites, xiii to xx. 



floresiana Horst. 

 Malay Archipelago. 



35 to 40 mm. 



125. Skin without pig- 

 mentation. 



Anna Horst. 



Divides somite I about 

 one-half. 



Java. 



30 mm. 



85. Skin with 

 meut. 



Oodeffroyi Michaelsen. 

 Hayti (or New Zealand ?) 



90 mm. by 4 mm. 



out pig- 118. Skiu slightly pig- 174. Anterior part of 

 mented and anteriorly body pigmented, 

 corrugated. | 



rugosa n. sp. 



San Francisco, Califor- 

 nia, imported. 



30: 



Divides partly the buc- Divides buccal somite Divides buccal segment 

 cal segment. about one-half. somewhat less than J. 



Incomplete, xiii to xxi. ' Incomplete in xiii to xxi. Incomplete in xiii to xx. Incomplete (xiii), xiv-xix 



The larger curved, strong- 

 ly curved at apex, and 

 with 6 groups of 2 blunt 

 tubercles, the smaller 

 expanded at apex like 

 a scalpel. 



Strictly paired, all ven- 

 tral; couples equi- 

 distant. 



A single pore on median 

 line iu xiv, on a slight 

 swelling. 



Each on a large papilla. I Inline with ventral setie. 



Not forward. 

 Two; both in viii. 



Not forward. 

 Two. 



Three pairs in xv, xvi and Three pairs in xv, xvi 

 xvii. 



In xi and xii. 



Not thicker 

 mites. 



and xvii. 

 In X and xi. 



any su- 



Arranged in three distinct 

 rows on either side of the" i 

 median line. Nei)hriil- 

 ium a consists ol two 

 unequal parts, the most | 

 ventral of which is the j 

 smallest. Nephridium a ! 

 is much larger than the 

 other nephridia. The 

 dorsal nephridia far apart. 

 Nephridia a open in front 

 of 1 and 2. 



The basal part wide, grad- Basal part with a single Basal and apical divisions 

 ually changing into the small diverticulum. \ globular, equal in size, 

 apical part. Single short I Apical division not glob- Single small diverticu- 



diverticulum. 



ular. 



Eeddish-brown, even in i Alcoholic specimens color- Dingy flesh-colored alive; 

 alcohol. ! less. I clitellum yellowish or pink. 



lum. 



In three rows, the pos- 

 terior ones with ccelo- 

 mic mantle. Nephrid- 

 ium a consists of three 

 lobes, each with a sep- 

 arate coelomic mantle. 

 The inner lobe is much 

 the smallest. The ne- 

 phridia are closer, over- 

 lapping. 



Apical division uot glob- 

 ular; dorsal part with 

 a single diverticulum. 



Three pairs in xv, xvi 

 and xvii. 



In xi and xii, two pairs. 



-Arranged in four series 

 on either side of the 

 median Hue; the ven- 

 tral one corresponds to 

 the dorsal seta>. 



Typhlosole present, but 

 not very large. 



Reddish flesh when alive. 



Present in xix-xxiv. 

 Pale reddish; no pigment 



Basal part pear-shaped; 

 apical part sac - like, 

 basal part with a glob- 

 ular diverticulum di- 

 rected forward. 



The larger seta with 4 

 broad bristles; the 

 smaller spoon - like, 

 but not forked. 



Distance between dorsal 



and ventral couples 

 about equal to that be- 

 tween ventral couples. 



Two distinct pores. 



The depression couuect- 

 ing the prostate pores 

 concave, with the con- 

 vex part turned toward 

 the median line. An 

 elevated area around 

 the depression. 



Anterior part much un- 

 dulated, the smaller 

 seta less so; three small 

 bristles at apex of 

 laigest seta. 



Distance between a dor- 

 sal and ventral couple 

 about three-fourths of 

 that between the two 

 ventral couples. 



Open in an oval glaud- 

 I ular area, pores open 

 ' separately on line with 

 setae 1 and 2. 



Not elevated, situated 

 at the corners of a 

 sqTmre area. 



Undulated, with 1 2 

 (about?) slight dentic- 

 ulatious or notches. 

 The form of smaller 

 seta doubtful. 



Largest seta with five 

 notches; smaller seta 

 forked, with prongs of 

 equal size. 



The four couples are Strictly ventral, 

 ventral and equidis- | 

 taut. 



Slender, numerous irreg- 

 ular notches, giving 

 knotty appearance, but 

 no teeth or bristles. 

 Many seta) iu each sao. 



In 4 couples, all ventral. 



Unknowi 



Open jointly in a median 

 pore in xiv. 



Two. 



Three pairs. 



Depressions connecting 

 pores lunate, with the 

 convex side turned to- 

 wards median line. 

 Area oval, not square; 

 a ridge borders the 

 grooves. 



Two in vi and vii. 



XV, xvi and xvii. 



Iu ix-xii. 



.interior prostate pores 

 elevated on papillie. 



Not forward. 

 In vii and viii. 



Three pairs iu xv, 

 aud xvii. 



The posterior uephridia 

 arranged iu 3 groiips 

 of delicate tubuli on 

 either side, the inter- 

 nal ones situated near 

 the dorsal setie. 



Arranged in four longi- 

 tudinal series on each 

 side of the median 

 line. 



Basal part longest and 

 as broad as the apical 

 part, with a narrow di- 

 verticulum. 



Basal part the longest, 

 narrow; single pear- 

 shaped diverticulum. 



A network of delicate 

 tubules anteriorly 

 spread over the body 

 area, except for a nar- 

 row dorsal and ventral 

 median line. Posteri- 

 orly arranged in four 

 rows on either side of 

 median line, and fvir- 

 uished with cielomic 

 mantle. 



Basal part longest and 

 very narrow, with a 

 uan-ow diverticulum 

 situated near the con- 

 traction. 



Arranged in four rows 

 on either side of me- 

 dian line. Posterior 

 uephridia with ccelo- 

 mic mantles. Neph- 

 ridia of nearly the same 

 size. Neph. d and d 

 abimt equidistant as 

 ft and a. The most 

 ventral part of nephrid- 

 ium o uot covered by 

 mautle. Clitellar ue- 

 phridia much larger 

 than those anterior of 

 clitellum. 



.\pical part smallest. 

 Both parts much flat- 

 tened. Very small di- 

 verticulum. 



The curved fosse between 

 the pores, with the con- 

 vex side turned towards 

 the ventral median line. 

 The anterior prostate 

 the largest. 



Three pairs. 



Alcoholic specimens col- 

 orless. 



Alcoholic specimens dis- 

 colored. 



Colorless . 



Present. 



Reddish flesh. 



Plectorephric condition, 

 but not known in detail, 

 except that they cover 

 the whole of the body- 

 wall except a narrow 

 strip doi-sally and ven- 

 trally. Stronger in the 

 clitellar somite, where 

 they form a thick cov- 

 ering. 



SpermatheciB with no 

 distinct diverticula, but 

 the smaller basal part 

 with irregular warty 

 protuberances. Anterior 

 spermathecio the larg- 

 est. The apical part sac- 

 like, larger and thin- 

 walled. The basal part 

 shorter. 



Anterior part reddish; 

 posterior part gray. 



