To face page 126. 
Table A. 
COMPARATIVE TABLE OF ALL KNOWN EXTRA-AFRICAN SPECIES OF THE GENUS BENHAMIA. ~ 
Habitat. 
Number somites .......-- 
First dorsal pore.....---- 
Prostomium 
Clitellum 
Penial set@.........- +++ 
Common sete 
Oviducal pore. ...-.---++ 
Prostate pores 
Pharynx 
Gizzards 
Calciferous diverticula . .. 
IS BPI) -BOC8 se olntnniseietatalais 
Spermducts 
Wephridiq: «cle seule 
Spermatheca 
nana 0. sp. 
San Blas, Territory of Te- 
Strictly tropical form. 
ping. 
Complete in the central 
somites, xili-xx. 
The largest with 12 or 
more strong bristles. 
Distance between the dor- 
to that between the yen- 
tral couples. 
Two pores, open in front 
of set 1 and 2, 
Not on papille. 
1 Situated yery far forward. 
In yiii and ix, 
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 cwlo- 
mic cell- mantle. The 
nephridia in 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 in front of 3 and 4. 
Basal part with one plain 
diverticulum. Apical 
part warty and irregular. 
20 to 30 mm. 
| 
110. Skin strongly pig- | 
mented in anterior so- 
mites. 
ill-iy. 
Very swollen and overlap- | 
sal couples about equal | 
pic, Mexico, at sea level. | 
mexicana Rosa. 
| Durango, Mexico, 2565 
metres above the sea level. 
Temperate form. 
| 30 mm. 
120. Skin not pigmented. 
iii-iv. 
Divides the buccal somite 
completely (7) 
Complete, xiii-xxi. 
Not ornamented (Rosa). 
According to Ude, faintly 
ornamented with 6 thick- 
enings. 
Setm 3 and 4 further apart 
than 1 and 2. 
Two pores in front of 
sete» 1 and 2 on small 
papilla, which touch with 
their bases. 
Not on papille. 
In viii and ix. 
Three pairs in xy, xviand 
xvii. 
In x and xi. 
Not enlarged ( ?) 
In three rows on either 
side, probably all of the 
same size. Nephridia a 
correspond to sete 1 and 
2. The nephridia on each 
side are equidistant, and 
the dorsal nephridia c ave 
as equidistant from the 
dorsal median line as 
from thelateral nephridia 
b. With eelomic mantle. 
The basal part wide, grad- 
ually clanging into the 
apical part. Single short 
diverticulum. : 
Bolavi Michaelsen. 
Hamburg, at Bergedorf, 
imported, and Venezuela 
(Ude). 
40 to 60 mm. 
97. 
y-vi. 
Does not divide buccal 
segment. 
Incomplete in all 
meuts, xili-xx. 
seg- 
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 xy, xviand 
xvil. 
One pair only in xi, 
In three rows on either 
side; the anterior ones 
have no ceelomic mantle 
like those posterior to 
the male pore. The two 
lateral nephridia of equal 
size; the ventral nephrid- 
ium is much narrower, 
but furnished with two 
separate ccelomic man- 
tles, the inner of which is 
smallest. The nephridia 
are more separated than 
in B. palmicola. 
Basal part with a single 
small diverticulum. 
Apical division not glob- 
ular. 
palmicola n. subsp. 
Baja California, Cape Re- 
gion and Tepic, Mexico, 
1000 and 4000 feet. 
50 mm. 
90. Not pigmented. 
iy-v. 
Not very pointed. 
Incomplete in all somites, 
xili-xx. 
The larger seta with four 
notches, the smaller one 
spoon-like at apex and 
forked. 
About equal distance be- 
tween the dorsal and yen- 
tral as between the yen- 
tral couples. 
One pore on a central 
media papilla. 
Not on papille. 
Not forward. 
Two; both in viii. 
Three pairs in xv, xvi and 
xvii. 
In xi and xii. 
Not thicker in any so- 
mites. 
Arranged in three distinct 
rows on either side of the 
median line. Nephrid- 
ium a@ consists of two 
unequal parts, the most 
yentral of which is the 
smallest. Nephridium a 
is much larger than the 
other nephridia. The 
dorsal nephridia far apart. 
Nephridia a open in front 
of 1 and 2. 
Basal and apical divisions 
globular, equal in size. 
Single small divertien- 
lum. 4 
papillata 0. sp. 
Tepic, Mexico, 4000 feet. 
50 to 70 mm. 
125 (largest specimen). 
v-yi. 
Divides partly buecal 
segment; swollen. 
Complete, but ventrally 
thin, xiii-xx. 
Larger with eight faint 
notches; smaller with 
a hair-like sigmoid 
point. 
Inner couples wanting 
in xviii, equidistant. 
Two clasely approxi- 
mated pores on a me- 
dian papilla. 
Each on a large papilla. 
Not forward. 
Two. 
Three pairs in xy, xvi 
and xvii. 
In x and xi. 
In three rows, the pos- 
terior ones with cwlo- 
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 diyision not glob- 
ular; dorsal part with 
a single diverticulum. 
octonephra Rosa. 
Paraguay. 
20 to 40 mm. 
85 to 95. 
xiii to xx, incomplete be- 
tween the ventral sets. 
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 in xiy, on a slight 
swelling. 
In line with ventral set. 
Three pairs in xy, xvi 
and xvii. 
In xi and xii, two pairs. 
Arranged in four series 
on either side of the 
median line; the yen- 
tral one corresponds to 
the dorsal seta. 
Basal part pear-shaped; 
apical part sac-like, 
basal part with a glob- 
ular diverticulum di- 
rected forward. 
malayana Horst, 
Malay Archipelago. 
20 to 30 mm. 
95. Skin without pig- 
mentation. 
y-vi or vi-vii. 
Continued into the bue- 
cal segment. 
Complete in the anterior, 
incomplete in the pos- 
terior somites, xiii to xx. 
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 connect- 
ing the prostate pores 
concaye, with the con- 
vex part turned toward 
the median line, An 
elevated area around 
the depression. 
The posterior nephridia 
arranged in 3 groups 
of delicate tubuli on 
either side, the inter- 
nal ones situated near 
the dorsal seta. y 
Basal part longest and 
as broad as the apical 
part, with a narrow di- 
yerticulum. 
floresiana Horst. 
Malay Archipelago. 
35 to 40 mm. 
125. Skin without pig- 
mentation. 
vi-vii. 
Divides somite I about 
one-half. 
Incomplete, xiii to xxi. 
Anterior part much un- 
dulated, the smaller 
seta less so; three small 
bristles at apex of 
largest seta. 
Distance between a dor- 
sal and ventral couple 
about three-fourths of 
tliat between the two 
ventral couples. 
Open in an oval gland- 
ular area, pores open 
separately on line with 
sete 1 and 2. 
Not elevated, situated 
at the corners of a 
square area. 
Arranged in four longi- 
tudinal series on each 
side of the median 
line. 
Basal part the longest, 
narrow; single pear- 
shaped diverticulum. 
Anne Horst. 
Java. 
30 mm. 
85. Skin withont pig- 
ment. 
iv-v. 
Divides partly the buc- 
cal segment. 
Incomplete in xiii to xxi. 
Undulated, with 12 
(about?) slight dentic- 
ulations or 
The form of smaller 
seta doubtful. 
The four couples are 
ventral and equidis- 
tant. 
Unknown. 
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 yii. 
Xv, xvi and xvii. 
In ix-xii. 
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 fur- 
nished with c@lomic 
mantle. 
Basal part longest and 
very narrow, with a 
narrow diverticulum 
situated near the con- 
traction. 
notches. | 
TUGOKU Li. Sp. 
| San Francisco, Califor- 
nia, imported. 
30 mm. 
118. Skin slightly pig- 
mented and anteriorly 
corrugated. 
v-vi, 
Divides buccal somite 
about one-half. 
Incomplete in xiii to xx. 
Largest seta with five 
notches; smaller seta 
forked, with prongs of 
equal size. 
Strictly ventral. 
pore in xiy. 
Anterior prostate pores 
elevated on papille. 
Not forward. 
Tn vii and viii. 
Three pairs in xv, xvi 
and xvii. 
Arranged in four rows 
on either side of me- 
dian line. Posterior 
nephridia with ccelo- 
if 
| Open jointlyina median .... 
mic mantles. Neph- 
ridia of nearly the same 
size. Neph. d and d@ 
about equidistant as 
a and a. The most 
ventral part of nephrid- 
ium a@ not covered by 
_ mantle. Clitellar ne- 
phridia much larger 
than those anterior of 
clitelum. 
Apical part smallest. 
Both parts much flat= 
tened. Very small di- 
verticulum. 
jo 
* 
2 
Godeffroyi Michaeleen. 
Hayti (or New Zealand”) 
90 mm. by 4 mm. 
174. Anterior part of 
body pigmented. 
Divides buceal segment 
somewhat less than 2. 
Incomplete (xiii), xiv-xix 
Slender, numerous irreg- 
ular notches, giving 
knotty appearance, but 
no teeth or bristles. 
Many set# in each sac. 
In 4 couples, all ventral. 
The curved fosse between 
the pores, with the con- 
vex side turned towards 
the ventral median line. 
The anterior prostate 
the largest. 
Plectorephric condition, 
but not known in detail, 
except that they cover 
the whole of the body- 
wall except a narrow 
strip dorsally and ven- 
trally. Stronger in the 
clitellar somite, where 
they form a thick coy- 
ering. 
Spermath: with | 
distinct diverticula, but 
the smaller basal part 
