446 WILHELM MICHAELSEN. 



furrows between segments 13-14 and 14-15, just above the 

 lines of the nephridial pores. 



There are glandular cushions present in relation to the 

 ventral seta? of segments 14, 16-18, 23-27, and on segments 

 13, 22, and 28 they are indistinct, or only occur on one side 

 of the body. The cushions of segments 16-18 differ some- 

 what from the others in being not circular and small, but in 

 occupying the whole length of the segments, and in being 

 bordered on the inner side by a common longitudinal line. 



Internal Anatomy. — The septum between the sixth and 

 seventh segments is very tender if not absent ; in the latter 

 case the septum between the fifth and sixth segments is 

 present and very tender. The septa between segments 7-8 

 and 8-9 are thickened and very strong, while all the posterior 

 septa are very delicate. 



Alimentary Canal. — There is a very large gizzard in 

 the seventh or in the sixth and seventh segments. A single 

 pair of nearly globular calciferous glands occur in the ninth 

 segment as lateral appendages of the oesophagus. The intes- 

 tine begins in about the thirteenth segment. 



Circulatory System. — The dorsal vessel is doubled from 

 the eleventh segment to the middle of the gizzard, that is, 

 to the middle of the seventh segment. The last hearts are 

 in the eleventh segment. 



Reproductive System. — Male organs: one pair of 

 sperm-duct funnels occur ventrally in the tenth segment 

 enclosed in an unpaired common seminal vesicle. The lateral 

 posterior corners of the vesicle are prolonged into a pair 

 of someAvhat broadened sac-like sperm-sacs Avhich seem to 

 project into the eleventh segment. The sperm-ducts pass 

 backwards in a straight line as far as the end of the fifteenth 

 segment, where they seem to enter the body-Avall. 



Spermathecal pores are single or in pairs. In the specimen 

 examined they were single on both sides at the intersegmental 

 furrow of segments 13-14, while in the furroAV between seg- 

 ments 14-15 they were single on the right side and double on 

 the left side. In this case the additional spermatheca was 



