C.U.IFdltMA ICrDIMI.TIi.i:. 37 



this species iniieli l;ii-<i-er llniii in I lilln iiht r/ti/miK. whieli ;i|i|ieiii-s to l)c cliiii-actcristic 

 also with nearly all the other organs. The uppei' <;l:ui(hilar part of the prostate is 

 abfiiit three times wider than the lower mn^iciilar pari. The latter is alxmt equal in 

 length to the ptMiial seta' ami their saes. 



Genital (ir exterior iiinti- zone (fig. 2">). In somite xvii there is a jiair ol' ven- 

 tial papilhe elose to the ventral ganglion, and sitnated in the transverse median line 

 of the somite. In these papilhe open the penial setie, in the place which otherwise 

 wonlil he oeenpied by the regular setu'. P.etween 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 eireidar eup-shaped depression, from the eenter of whieh is spread 

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

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

 whieh the fan-shaped muscular fascicle starts, is sitnated the exterior opening of the 

 s[)i'rnuluct and the prostate. Tn 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 

 posteiior pait, m- rallier lliei'e are two large anterior folds, 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, 189o. 



Size about 1 inch by ^V- The inner couples of seta? as well as the setae 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 spermathecal sac. A small species, in 

 many respects i-esembling Deltdvia Trnijeri, but very distinct by the above character- 

 istics. 



Hahifat. T have found this worm only in a gulch or canon at the outlet of the 

 waterworks and dam, known as Lake C'habot, 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 fi-om 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 transparent, 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. 



Krienor cltaracters. In general appearance, the worm resembles Deltania 

 Iroi/eri, 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 especially as regards 

 position of the setie that the greatest external difTerence exists (fig. 40). The ven- 

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



