250 California Earth-Worms. [ZOE 
phora, dark brown in color and which inhabits wet places. 
There is no Lumbricus. By far the most numerous worms 
belong to the family of Eudrilide. They are easily distinguished 
by their pinkish color, coupled with the fact that the male 
papillae open in the posterior part of the clitellum. There are 
of this family two distinct genera with at least four or five 
species, some of which are large, others very small, resembling 
in size Ocnerodrilide, which latter genus is represented by at 
least one species, which however may be of southern importation, 
as its distribution is exceedingly limited. In Baja California 
two genera of this family are represented by at least two species, 
and in Mexico and Central America by many. It possesses a 
large southern distribution. 
I have so far distinguished the following genera and species 
in California, of which a more detailed account is soon to be 
published in the publications of the California Academy of 
Sciences of San Francisco. 
DELTANIA GEN. NOV. 
' Prostomium dovetails somite i. Eight sete in four couples, 
beginning on somite ii. Setze of the inner couples in the genital 
region converging towards the male pore. Buccal cavity, pharynx, 
cesophagus and sacculated intestine, but no gizzard and typhlo- 
sole, nor cesophageal pouches. Clitellum xiii to xvii. No dorsal 
pores. Testes in x and xi. Spermsacs present and free. Sper- 
matheca present or absent. Ovary one pair in xiii, oviduct in xiv. 
No ovisac. Spermducts open in xvii together with a large paired 
prostate. The spermducts join the muscular part of the prostate 
in the body wall. Penial setze open in the same ductas the prostate. 
No subneural vessel. The anterior few nephridia open in front of 
seta 4, the posterior nephridia in front of seta 3. All nephridia 
furnished with a large terminal bladder near the body wall. 
Small, transparent, glossy worms with orange-colored clitel- 
_ lum, living in moist, especially sandy soil. The genus differs 
from Microscolex principally by the deltoid arrangement of the 
ventral setze in the vicinity of the male pore. 
The genus appears indigenous to the American Continent, 
species having, however, been found in Australia and Madeira, 
