36 CALIFORNIA ACADEMY OF SCIENCES. 
not extending above the junction with the diverticula. In general form the sperma- 
theea resembles that of the following species, D. Benhami, but the outline of the main 
sae is less regular and the diverticula are larger, being about one-half as long as the 
main sac (figs. 30 to 32). 
Testes. As usual there are two pair of small testes occupying somites x and 
xi. They differ in nothing particular from those of the other two species of the 
genus. 
Sperm-sacs. ‘There are two pair of sperm-sacs, one each in somites x and xi. 
They are long, not very opaque bodies, occupying a large part of the somite, though 
not filling it closely. The spermatophoric spherules are comparatively large, 
globular. The sperm-sacs are not greatly lobed, extend considerably in length from 
the dorsal to the ventral side, and are of more undecided shape than the sperm-saes 
of Deltania elegans and Benhami. They are also, comparatively, much larger (prin- 
cipally higher) than in that species. It will be noticed that the sperm-saes occupy 
somites x and xi, while in Detania elegans, Benhami and dubia they occupy somites 
xi and xii. 
Ovary and Oviduct (figs. 35, 36, 37, 38). As might be expected the ovary is 
situated in xiii. It offers no characteristics of interest. There is no ovisac. The 
oviduet is as usual funnel-shaped, either deeply cut or folded on one side, the inner 
funnel in xiii, the ovipore in xiv. Close to the oviduct in xiy there is a very peculiar 
sac (figs. 35 ef seq.), of the size of the oviduct or smaller. It does not open directly in the 
oviduct, and it has the general shape of aseptal gland with many rounded lobes arranged 
as the petals in a rose. The epidermal covering does not closely cover the inner cells 
which are irregular, apparently not closely packed, of uneven size and shape, round 
or conical, each with a round nucleus, and grainy cell contents. This gland does not 
connect with the opening of the oviduet funnel, from which it is separated by the 
septum between xiii and xiv. There is one pair of those glands, one behind each 
oviduct. The gland is affixed to the posterior part of the anterior septum in xiv. A 
similar gland does not exist in Deltania elegans. As to the nature of this organ IT ean 
say nothing definite, and I hesitate to consider it as an ovisac, until a more extensive 
material will allow other investigations. 
Spermduct and Prostate (fig. 33). As in the preceding and following species, 
the spermduet and prostate open in the same pore in somite xvii, The spermduet 
opens slightly posterior to the prostate and also more outwardly, though both organs 
closely join at the pore. The spermduct is quite wavy throughout its length to the 
ciliated rosettes, which as usual are found in x and xi, The rosettes are less folded 
and crenate than those in Deltania elegans. The prostate differs somewhat from the 
one in the latter species. The muscular duct is not helix-like at its upper end, either 
straight or bent at right angle to itself, with the distal end pointing backward, being 
parallel to the longitudinal axis of the body. The relative size of the prostate is in 
