DESCRIPTIONS OF GENERA AND SPECIES 419 



begins in XV ; caeca are indented on lower border forming two processes. Hearts in 

 XI-XIII. Spermathecae in VI-VIII ; duct of pouch as long as itself, the diverticulum 

 more than half as long as spermathecae, terminating in a knobbed end. Sperm-sacs and 

 sperm-reservoirs two pairs ; former in XI, XII; latter in X, XI. Spermiducal glands 

 open by a duct, which is slightly bent into an f -shape. Hab. Borneo ; Mandhor, Java. 

 No measurements can be given as MICHAELSEN had only one specimen, incomplete. 



This being the case, it is remarkable that he gives the list of localities which I 



copy here. 



(41) Perichaeta stelleri, MICHAELSEN. 

 P. stelleri, MICHAELSEN, JB. Hamb. wiss. Anst., Bd. viii, 1890, p. 39. 



Definition. Length, 190 mm.; breadth, 7 mm.; number of segments, 153. Clitellum, 

 XI VXVI; without setae. Male pores separated by fourteen setae. On segments 

 XIX-XXI are a pair of papillae, which get nearer together posteriorly ; the last pair 

 being separated by nine setae. Setae with faintly marked gaps ; fifty-six in segments of 

 middle of body. Dorsal pores commence XII/XIII. Calciferous glands in XIII. Intestine 

 begins in XIV ; no caeca. Septa V/VIII, XI/XIV thickened. Hearts in X-XIII. 

 Spermathecae 16-28 in member in segments VI, VII, with diverticula. Sperm-reservoirs 

 in X, XI, connected with an equal number of sperm-sacs. Spermiducal glands occupy 

 XVII-XIX, with horseshoe-shaped duct. Hab. Sangir. 



This species is like P. everetti and a few other allies for the fact that it possesses, 

 like certain Geoscolicidae, numerous spermathecae in one segment. Each of the 

 spermathecae has a diverticulum, which is swollen where it arises from pouch ; then 

 becomes a slender thread, and finally expands again at the free extremity. The 

 diverticula are about one quarter the length of the pouches ; it is not quite certain 

 whether some of the pouches may not have more than one diverticulum. 



(42) Perichaeta ringeana, MICHAELSEN. 

 P. ringeana, MICHAELSEN, JB. Hamb. wiss. Anst., Bd. vii, 1889, p. 10. 



Definition. Length, 70 mm. ; breadth, 3-|- mm. ; number of segments, 107. Clitettum, 

 XIII XVI, without setae. Hale pores on level with ninth seta, situated on papillae 

 which extend over segments XVII-XIX. Setae : on VII, 34 / on III, 24 ; 56 in middle 

 segments. Dorsal pores commence XI/XII. Oesophagus much folded in XII, XIII ; 

 intestine with a diverticulum reaching through several segments, with typhlosole. Hearts 

 in XI-XV. Spermathecae in VIII, IX, with a long diverticulum expanded at end. 



3 H2 



