a2 CALIFORNIA ACADEMY OF SCIENCES. 
In one specimen I found only one spermatheca, situated in the center of the ventral 
line, between somites ix and x, but in x. Another specimen had two spermathece, 
one in ix /x, another on the left side, between x and xi. Another had two sperma- 
theez betweeen x and xi, one on each side. Another had two spermathece between 
ix and x, one in center of median line, and one on the right side, always attached to 
the intersegmental wall. This arrangement and variability of the spermathece 
reminds us of the spermathece in Microcheeta, where the number varies on either 
side; but in other respects there is no similarity between the two. The exterior 
spermathecal pores are not conspicuous, and not perceptible when viewing the out- 
side of the body, mounted, for instance, in glycerine. As will be seen, the sperma- 
theea in this species differs very much from those in Deltania Troyeri and Benhami, 
in which two species this organ is constant, and furnished with two diverticula each. 
The spermatheca in Deitania elegans resembles greatly in structure a sperm-sae, from 
which it only differs in size and in position. It reminds me greatly of the peculiar 
organ described by me in Ocnerodrilus occidentalis, where, apparently, the posterior 
testes have become modified, and assumed the function of spermathecee, with a dis- 
tinct and ciliated duct perforating the body-wall. 
The spermatozoa are always found agglomerated in spherical masses in the 
spermatheea, hardly regular enough to be designated as spermatophores. The tails are 
lone, either extending straight out, or arranged screw-like in the same direction 
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around the sperm-ball. These balls vary greatly in size, some being twice as large as 
others, but they are always round and apparently globular (fig. 15). 
« © J dD D 
Ovary and Oviduct (fig. 9). As usual the ovary is found in xiii. It offers no 
great peculiarities. It is rather deeply lobed and very large. The oviduct opens in 
xiv, with its funnel in xiii. The oviducal funnel is very thick, substantial and round, 
with a circular and very regular outline. The figures (5 and 9) give correctly its 
outline, but the depressed folds have been too distinctly marked. There is no ovisae, 
and the oyary and oyiduets are entirely free. 
Blood vessels. The dorsal vessel emits three pair of hearts in x, xi, xii, and the 
ventral vessel is forked between somites ix and x. The blood is yellowish-red, more 
decidedly yellow than red. There are but few blood vessels on the nephridio-tubes and 
none on the nephridio-vesicle. 
The ventral nerve-cord is considerably wider in the posterior part of the 
somites where it emits the customary pair of nerve fibers. In the anterior part 
where the single septal nerve pair is emitted, the nerve-cord is quite narrow. In 
Deltania Troyeri the nerye-cord is quite uniform without any nodular enlargements, 
as wide at the anterior as at the posterior end of the somite. The brain is narrow, 
slightly curved and the posterior sinus shallow. — It is situated in somite ii (fig. 6). 
