CALIFORNIA EBEUDRILIDA, 37 
this species much larger than in Del/tania elegans, which appears to be characteristic 
also with nearly all the other organs. The upper glandular part of the prostate is 
about three times wider than the lower muscular part. The latter is about equal in 
length to the penial setee and their sacs. 
Genital or exterior male zone (fig. 25). In somite xvii there is a pair of ven- 
tral papillee close to the ventral ganglion, and situated in the transyerse median line 
of the somite. In these papillze open the penial setee, in the place which otherwise 
would be oeceupied by the regular sete. Between these papillee 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 of 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 between the suctorial cups is a smaller 
triangular depression. The anterior part of the somite is raised and thicker than the 
posterior part, or rather there 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. 
Deltamia Benhami Eisen, Zoe, iv, 212, October, 1895. 
Size about 1 inch by ;;. The inner couples of setee as well as the sets 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 } as large as the main spermathecal sac. A small species, in 
many respects resembling Deltania Troyeri, but very distinct by the aboye character- 
istics. 
Habitat. I have found this worm only in a gulch or ecaiion 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 searce 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 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. 
Exterior characters. In general appearance, the worm resembles e/tania 
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 especially as regards 
position of the sete that the greatest external difference exists (fig. 40). The ven- 
tral setee in one species are much closer together than in the other species of the 
