CALIFORNIA EUDRILIDA. 
Deltania Troyeri. 
Figs. 21 to 39. 
Deltania Troyeri Eisen, Zoe, iv, 251, Oetober, 1893. 
Size about 14 inch by $ line. Septal glands comparatively large, the one in 
vi the largest. One pair of large, opaque spermatheca, furnished with one pair of 
diverticula, which are about $ or more longer than the spermatheca proper.  Sperm- 
sacs in x and xi, not lobed. One developed seta in each sac of penial setee. Pros- 
tate is tubular, not helix-like, with the top either straight or bent at right angle, pro- 
jecting backward. The exterior penial papillee not as prominent as in the preced- 
ing species. The inner couples of sete are further apart than in the following species. 
Habitat. This species was first brought to my attention by Professor Carlos 
Troyer, of San Francisco, who found it, together with the preceding species, in the 
Golden Gate Park, in San Francisco, immediately north of Strawberry Hill. It 
occurred there in sandy depressions, where the rain and drainage water had moist- 
ened the soil in March and April. As the soil dried up the worms disappeared. 
The worm is very searce at any time, and not one specimen is found to every hun- 
dred of Deltania elegans. 
Evterior characteristics. Fixteriorly this species is characterized at once from 
Deltania elegans by being very much smaller, as much so as an Enchytreeus is 
smaller than an average medium-sized Lumbricus. The length in the largest speci- 
mens is about two inches, when stretched to its full capacity, though the average ones 
hardly reach one inch. The width is less than one line at the clitellum and less than 
! line at the tail end. The first somite is much longer than any of the following. 
The second somite is next in size, while all the others are smaller and of very much 
the same proportions as in Deltania elegans. Thus iii, iv and y, are larger than the 
following, and those between v and xiii are smaller and of about the same size. 
The clitellum occupies the same somites as in Deltania elegans, or from xiy 
to xvii, with the two outside somites smaller than the central ones. The body tapers 
towards the tail end, the last somites being somewhat larger than the others and 
rather obtuse. 
The color is pale flesh, with a darker, yellowish clitellam. The whole body 
is very transparent, just as the former species, but much less so than in the following. 
It is a very tender worm indeed, and can only be brought home alive with great 
care, as the least increase of temperature is apt to kill it. In no instance did I sue- 
ceed in keeping it alive more than a couple of days. In this respect, however, all 
the species of the genus are very much alike, and if there is any difference the larger 
species is the most tender. 
Sete (figs. 21, 24 and 39). The general arrangement of the setz is similar to 
that of Deltania elegans, but the two inner sete are much less close together, in compari- 
son with the two outer ones, than in the latter species, but not as close by one-half as in 
. 
