2l6 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



adjoining these grooves are two elevated ridges, one on 

 either side. Exterior to each of these ridges is a line of 

 papillae, of which a pair of each is on somites XIV-XIX. 

 Interior to this outer row there are two inner pairs occupy- 

 ing the places of the ventral setae in somites XV and XVI. 

 These papillae are absent in some specimens. The sperm- 

 athecal region in somite VIII is marked by a pair of ventral 

 median papillee on the anterior half of the somite. The 

 papillge are situated close together, in line with the ventral 

 setae. 



Setce. — The ventral setae as well as the lateral are absent 

 on somite XVIII. The common setae are strictly paired 

 and all ventral. The tips of the set« are indistinctly sculp- 

 tured with small wavy depressions. The penial setae are 

 short and very slender, about one-third or one-fourth as 

 thick as the ordinary set£e. One seta is straight, of the 

 shape of a knife suddenly contracted at the point. The 

 other is sigmoid and curved at the apex, neither being 

 ornamented exteriorly. Interiorly they are seen to be com- 

 posed of numerous rings, one following the other as in a 

 coil of wires. 



Calciferous Diverticles. — Only the anterior contains lime 

 crystal. The three diverticles open separately into the 

 intestine. There are minute septal glands in VII-XIII. 



The typhlosole is very small and confined to two somites. 



The clitellum is not well developed and it is impossible to 

 state whether it is saddle-shaped or ring-like. 



The spermatheccB consist each of a broad, rather flat 

 spear-head-shaped sac. At the base is a single flat round 

 diverticle with the form of a rosette. Upon closer examina- 

 tion this rosette is seen to be composed of four to ten 

 interior chambers, only slightly set off exteriorly. 



The diverticle is situated on the anterior side of the 

 septum, while the main sac projects backwards into the 

 posterior somite. The diverticle is about one-third the 

 length of the main sac. There are no sperm-sacs. Sperm- 

 tanks in X and XI. 



