420 OLIGOCHAETA 



Sperm-sacs in XI, XII; sperm-reservoirs in X, XL Spermiducal glands well developed. 

 Hob. — Vera Cruz (Mexico). « 



In one specimen Michaelsen found an additional pair of spermathecae in vii. 

 The dorsal surface of the preserved worms is brownish with a median purple stripe. 



(43) Perichaeta hawayana, Rosa. 



p. Hawayana, EoSA, Ann. k. Hofm. Wien, Bd. vi, 1891, p. 396. 



Deflnition. Length, 100 mm.; Ireadth, 4 mm.; number of segments, 88-95. Clitellum, 

 XIF-XVI. Male pores on ninth seta; close to pore on each side a group of three 

 papillae. Lntestine begins in XV ; the txco caeca Jiave a pinnate appearance. Septa 

 V/VIII, X/XII are thiclened ; septa FIII/IX, IX/X are wanting. Hearts in segments 

 X-XII. Three pairs of spermathecae in 71, YII, Till; diverticulum as long as pouch. 

 With a dilated extremity. Sperm-sacs in XI, XII ; they communicate with the sperm- 

 reservoirs of segments X, XL Spermiducal glands large, extending through seven segments 

 {XVII-XXIII), no terminal dilatation to the muscular duct. Hob. — Hawai. 



(44) Pericliaeta racemosa, Rosa. 

 p. racemosa, Rosa, loc. cit., p. 399. 



Definition. Length, Jio mm. ; breadth, ^ mm. ; number of segments, 100. Clitellum, XIF- 

 XVI. Male pores in line with seventh seta. Setae 46 in segment VIIL Dorsal pores 

 absent {?). Qizzard in LX (?'). Septa Y/VLL thickened. Spermathecae in LX, diverti- 

 culum divided at free end into 3-5 globular saqf. Sperm-sacs in XL, XLL. Spermiducal 

 glands small, with straight short duct opening into a terminal sac. LLab. — Borneo; Java. 



(45) Pericliaeta sieboldi (Hoest). 



Megascolex Sieboldi, HoKST, Notes Leyd. Mus., vol. v, 1883, p. 191. 

 P. Sieboldii, Rosa, Ann. k. Hofm. Wien, Bd. vi, 1891, p. 401. 



Definition. Length, 270 mm.; breadth, 10 mm.; number of segments, 135. Clitellum, 

 XLV—XVL, without setae. Male pores on line with seta fourteen. Setae, ,76-80 on 

 spermathecal segments. Dorsal pores commence XLL/XLII. Lntestine begins in XV, caeca 

 with six or seven diverticula. Septa in front of segment VLLL thickened ; also X/XLV. 

 LLearts in X-XLLL. Spermathecae in VLL-LX opening on line with seta eighteen; 

 diverticulum zigzag shaped. Sperm-sacs in XL, XII; sperm-reservoirs in X, XL Egg- 

 sacs in XLLL. Spermiducal glands with short straight duct. Llab. — Japan. 



