170 CALIFORNIA ACADEMY OF SCIENCES. 
EXTERNAL CHARACTERS. 
The variety resembles the main form in most respects, but is much larger, 
especially thicker. The contracted specimens were as long as the longest of the main 
form from San Francisco, when fully extended, and twice as thick, and must, when 
alive, have measured 45 mm. by 25 mm. Other external characters agreed exactly 
with those of Deltania Troyeri type from San Francisco, California. The deltoid 
arrangement of the ventral sete in the genital region was identical, which satisties me 
that we in this arrangement have most important species characters between the 
species of this genus. 
INTERNAL CHARACTERS. 
The variety differs from the type in two particular points. 
The septal glands are present only in two somites, y and vi, and are exceedingly 
thin, or about one-fourth as thick as those of D. Troyert type. This refers to those 
superior to the intestine. Those below the intestine I could not discern, as no sections 
were made. The glands were lamellie-like, and only about twice as thick as the 
septum. 
The spermathece were thicker than those of the type, with more inflated diver- 
ticula. 
The prostate was thick, and its glandular part about 15 times longer than the 
very thin muscular duct. Two or three fully developed penial sete with each 
prostate. 
Deltania Troyeri Eisen, n. var. lagune. 
Figs. 144-147. 
Derinition. Size 32 mm. by 1 1-2 mm. No copulatory papiile. Sete a and 
b next posterior to clitellum, reach their final distance in the fifth somite posterior to clitel- 
lum. Spermathece in ix twice as large as those of the type, contracted at center, apical 
part swollen. Prostates more slender than in the type. Large ovisacs. Habitat, Baja 
California, Sierra Laguna. 
DETAILED DESCRIPTION. 
Habitat. The exact locality in the Cape Region of Baja California and Sierra 
Laguna is a camping-place called La Joya. There, where the trail crosses the creek 
the water had backed up behind some fallen logs causing a miniature mudflat covered 
with leaves and sediment. The specimens were found in the rotten wood and under 
the decayed leaves in the mud. Altitude about 5500 feet. 
EXTERIOR CHARACTERS. 
The average specimen is larger than the type from San Francisco, the largest 
specimen of the latter being smaller than the average mature specimens of the 
variety /agune. The two round copulatory palpille figured by me from D. 7royeri 
are not seen in the variety. The sacs of penial set in several dissected specimens 
possessed each two penial sete fully developed, one haying three, but of which one 
