2l8 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Benhamia jamaicae, sp. no v. 



Plate XIV, Figs. 168, 169. 



Definition. — Length 40 mm., width 4 mm. Somites 130. Setse closely 

 paired, the lateral interval slightly greater than the median. Penial setae 

 present, smooth with hook-like apex. Male pores in the equator of XVIII. 

 Anterior prostate pores in the posterior part of XVII ; posterior prostate 

 pores in the equator of XIX. Prostomium large, divides somite I com- 

 pletely. Somite II larger than those following. First dorsal pore in VI/VII. 

 Clitellum complete but ventrally thin, in XIII-XX. Gizzards two, in VI and 

 VII. Diverticles of the intestine, three pairs in XV, XVI, XVII, not con- 

 nected with each other and opening independently into the intestine. Saccu- 

 lated intestine in XIX. Dorsally and ventrally enlarged intestinal epithelium 

 in XXI to XXIV. Suprapharyngeal glands with four tiers of lobes. Septal 

 glands thin but almost continuous from VIII to XIV. Spermathecae: pores 

 postseptal, VII/VIII, VIII/IX, main sac in VIII and IX, tubular, with a 

 minute, wart-like diverticle at the base and a larger diverticle higher up. 

 Testes in X and XI. Sperm-funnels in X and XI. Sperm-masses in X and 

 XI. Ovaries in XIII. Ovisacs in XIV. Oviducts in XIV. Prostates large 

 and thick, confined to somites XVII to XIX. Sperm-ducts fused, in XVII, 

 a horseshoe-like loop in XVI. Micronephridia, posterior ones, with coelomic 

 mantles. Color reddish. 



Habitat. — Island of Jamaica. One specimen collected 

 by Professor C. H. Tyler-Townsend. 



Detailed Description. 



Owing to the want of specimens for dissection, the 

 description of some of the interior organs, especially that of 

 the spermathec£e, is not as full as is desirable. 



Somites I, II and III are set off from the balance. Somite 

 III is the largest. The intersegmental groove between I 

 and II is hardly distinguishable. 



The common setcB are smooth and not characteristic. 

 The larger of the penial setae is a little more curved than 

 the smaller. The apex of both is furnished with a small 

 close, helix-like hook, which in the larger seta is a trifle 

 more distinct than in the other. 



Sense-cells. — There is a zone of hyaline cells with sense- 

 cells in the equator of every somite, also similar cells in the 

 anterior parts of the pharynx. 



