CALIFORNIA El'DKIMD.K. 37 



this species miicli larger tlniii in Jhlinnia ekgans, which appears to be cliaracteristic 

 also witli nearly all the other organs. The upper glaiuhilar part of the prostate is 

 al)ont three times wider than the lower muscular part. The latter is about equal in 

 length to the penial sette and their sacs. 



Genital or exterior male zone (fig. 25). In somite xvii there is a pair of ven- 

 tral papilhe close to the ventral ganglion, and situated in the transverse median line 

 of the somite. In these papilhe open the penial seta\ in the place which otherwise 

 would be occupied by the regular setie. Between these papilhe and the ventral 

 median line of the body, somewhat nearer to the posterior margin of the somite, are 

 seen on either side a circular cup-shaped depression, from the center of which is spread 

 backward a large fan-shaped branch df muscles connecting with the posterior inter- 

 segmental groove. In the center of this suctorial organ, and at the very point from 

 which the fan-shaped muscular fascicle starts, is situated the exterior opening of the 

 spermduct and the prostate. In the median line l)etween the suctorial cups is a smaller 

 triangular depression. The anterior part of the somite is raised and thicker than the 

 postei'ior part, or rather there are two large anteri(^r foUls, and several smaller posterior 

 ones in the vicinity of the male pores (fig. 25). 



Deltania Benhami. 



Plates XV and xvi, figs. 40-48. 



Deltania Benhami Eisen, Zoe, iv, 212, October, 1893. 



Size about 1 inch by j\. The inner couples of setae as well as the sette in the 

 inner couples are much closer together than in any other species. The spermatheca 

 are large, opaque, situated in ix, and opening between ix and viii, with two diverticula, 

 which are less than h as large as the main s[)ermathecal sac. A small species, in 

 many respects resembling Beltania Troyeri, but very distinct by the ai)Ove character- 

 istics. 



Rahitat. I have found this worm only in a gulch or canon at the outlet of the 

 waterworks and dam, known as Lake Chabot, east of Alameda and San Leandro, in 

 Alameda Co., California. The worm is very scarce and lives under damp leaves in 

 the very top layer of the soil around the roots of trees. The exact locality is to the 

 right of the gate which closes the reservation, down by the creek, not far from the 

 wire fence. It occurs here alone, not mixed up with any other species, and to all ap- 

 pearances this species is a true native and not introduced. It is an exceedingly deli- 

 cate worm, almost trans'^j)arent, white, with yellowish clitellum, very impatient of 

 being handled and can only be kept alive with great care. It is much more trans- 

 parent than any of the other species. 



Exterior diameters. In general appearance, the worm resembles Deltania 

 Troyeri, but is slightly larger in size. The second somite is much narrower than in 

 that species, being larger than the third somite. But it is especiall}' as regards 

 position of the setfe that the greatest external difference exists (fig. 40). The ven- 

 tral setie in one species are much closer together than in the other species of the 



