Lif CALIFORNIA ACADEMY OF SCIENCES. 
the spermducts in Phoenicodrilus also open intothe atrium. But the question that still 
remains to be settled is this. Is the atrium in Phcenicodrilus a modified bursa ecopu- 
latrix, or is it simply the remains of deteriorated prostate. The absence of a penis 
in Pheenicodrilus makes the latter alternative seem most probable. While in Oene- 
rodrilus the reduction of the prostate consists in the loss of one layer of glandular 
cells in the apical part, this reduction has proceeded further in Phoenicodrilus, the 
whole glandular apical part here being wanting. 
The principal differences between the genera Ocnerodrilus and Phoenicodrilus 
are then as follows: 
Ocnerodrilus. A prostate of varying size is always present at the male pore. 
This prostate consists of two parts, one glandular, lined by a single layer of cells, and 
one muscular basal part. 
Phenicodrilus. No prostate, only a short or rudimentary muscular atrium, in 
the lower part of which opens the spermduct. 
Pheenicodrilus taste Eisen. 
Derrnirion. Atrium rudimentary, muscular and bulbous, only about twice as 
thick as the spermducts. No ovisac. Spermathece covered with warty excrescences. 
Arciform muscles in xvii comparatively few. 
This species, which I first described from the west coast of the Cape Region 
of Baja California, has since been found by Messrs. Eisen and Vaslit in two widely 
separated localities. It was found in great numbers at Miraflores, on the east side of 
the Sierra of the Cape Region, some 30 miles north of San José del Cabo, together 
with Ocnerodrilus Beddardi, Sept., 1894. It was, however, quite unexpected to find 
this species also common in garden soil at San Blas, the seaport in the territory of 
Tepic, several hundred miles south of the Cape Region peninsula. I can find no 
differences in the anatomy, nor in the exterior of the specimens from these respective 
localities. The small copulatory papilla in somite xiy, lateral to the oviduct, is present 
in all. So are the numerous muscles in the copulatory region around the male pore. 
Pheenicodrilus tepicensis n. sp. 
Figs. 155-160. 
Derinition. Atrium about twice as long as the body wall, but hidden by arciform 
muscles in somite xovi. A median ovisac in aiv/xin. Spermathece entirely smooth, 
without warty excrescences. Arciform muscles in xvii very numerous. 
Halutat. Numerous specimens in and around the city of Tepic, territory of 
Tepic, Mexico, 4000. In moist soil under logs, in gardens, ete. November, 1894. 
Found together with Acanthodrilus Vasliti. Only few specimens were adult in 
November. 
EXTERIOR CHARACTERS. 
Size 4 em. by 15 mm. Number of somites 75. 
Clitellum incomplete, comprising somites xiii—xix. 
