134 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



the City of Mexico and at Morelos, Mexico. In the latter 

 district they were found in the pine timber at an altitude of 

 6,000 to 7,000 feet. 



Notes on the Tepic Specimens. 



Upon dissection, one of the specimens which had pre- 

 viously been overlooked and referred to Ocnerodrilus tepi- 

 cencis was found to agree in all the principal points with 

 O. taste from the Cape Region of Baja California. Both 

 species are characterized by the absence of the ovisac, the 

 small clitellum in XIV-^^ XIX, and by the short, thick, 

 and warty spermathecas, although in O. te^icencis they are 

 very small and do not occupy more than one-fourth the 

 width of the somite, while in the type-specimens from El 

 Taste they are larger, extending fully to the posterior part 

 of the somite (fig. 135). In O. taste there is not the dis- 

 tinct, star-like, radiating zone found in somite XIV of the 

 other species. The specimens are large and fully mature, 

 and it is therefore not probable that the spermathecse are 

 undeveloped. 



Notes on the Specimens from the City of Mexico. 



The specimens from the City of Mexico differ in some 

 respects from those from the type-locality — the mountains 

 of Baja California. There is no star-shaped papilla in 

 somite XIV, in line with set£e cd. The spermathecae are a 

 little smaller and the outline of the sac-like part is more 

 even, the undulating margin being confined to the apex of 

 the sac. The sperm-sac in IX is furnished with some six to 

 eight lobes, which are less minutely racemose than in the 

 type. In X and XI sperm-masses only are found. This 

 seems to be a common characteristic of most of the species. 

 The sperm-sacs in XII are also racemose, long and narrow, 

 and postseptal. There is absolutely no trace of any pros- 

 tates. The two sperm-ducts run close together until they 

 reach a point just above the male pore, when they fuse and 

 become invested with a heavier coat of muscles. They 



