CALIFORNIA EUDRILID®, Zo 
one in xil. Prostate is at the top helix-like folded. Penial papill:e prominent, with 
two or more penial sete in each sac. 
The worm is very pale, glassy, semi-transparent with reddish-orange clitellum, 
and with the dorsal vessel showing prominently through the body-wall. It is very deli- 
cate, succumbs readily to heat and can only with difficulty be kept alive. It is the 
largest of the species belonging to this genus as far as known. 
Habitat. Deltania elegans is so far only found around San Franeisco, Califor- 
nia, and at Santa Rosa and Mount Diablo, especially under decaying manure in natura] 
hollows in the Golden Gate Park. It is common immediately north of Strawberry 
Hill in the sandy hollow where rain water collects and keeps the soil sufficiently moist. 
The worm is not found in the water, but at the water’s edge, the water, however, being 
only temporary during the rainy season. A few specimens also found in Berkeley 
along the creek. In the locality in Golden Gate Park the worms congregate in large 
masses, always in the sandy soil. At Santa Rosa and Mount Diablo I found only few 
specimens, the season being at my visit in May far advanced and the soil was drying 
fast. Mature in April and May. 
DETAILED DESCRIPTION, 
Exterior characteristics. The worm varies considerably in size, but averages 
about three inches in length, by a width of from two to three lines, tapering consid- 
erably towards the tail. The color is pale flesh, with a bluish cast, and quite trans- 
parent, glassy, with a yellowish clitellum. Altogether, the exterior appearance of the 
worm is one of great deticacy, greatly heightened by its semi-transparency. 
The cephalic prostomium is prominent, and divides the peristomium about ? 
of its width (fig. 3). This, the first somite, is wider than any of the following. 
Somites ii and iii are next in size, and about equal in width. Somites iv to xi are 
smaller, about equal in width, slightly decreasing backward. Somites xii and xiii are 
smaller than any of the other anterior somites, and of about the same respective width 
(fig. 2). No dorsal pores. 
The clitellum (figs. 2 and 15) commences with somite xiv, though xiii is gen- 
erally somewhat thickened. The clitellial somites xiv, xv and xvi are very wide, 
about as wide as somites ii and iii, and of the same size. Somite xvii is much smaller. 
This somite carries the male pores and papille (fig. 15). These are situated in the 
posterior part of the somite, almost on the edge of the intersegmental groove (fig. 15). 
The papillie are slightly raised around the opening of the sac in the penial sete. The 
papillee are situate close together very near the median line of the body, a short dis- 
tance only from the ventral ganglion. The papilla is oblong, sigmoid, with a pore 
for the sete at inner end. Between it and the intersegmental groove is seen the slit 
in which open the prostate and the spermduct. It is situated slightly to the outside 
of the penial papilla (fig. 14). 
The oviducal pores are in the anterior part of xiy, generally in a depression 
anterior to and more ventrally located than the inner couple of sete. Spermatheeal 
pores are variable, not perceptible. The nephridio-pores are in front of the third set, 
