12 THE CHICAGO ACADEMY OF SCIENCES. 
albuminiparous gland and finally narrows and unites with the duct of 
the receptaculum seminis to form the vagina (21). The receptaculum 
seminis or spermatheca (also called swammerdamuian vesicle, 23) is a 
more or less bulbous or pyriform sac of large size, which is connected 
with the oviduct by a long duct (22). This sac is usually yellowish 
or orange in color and occupies a position in the body to the left of 
and behind the prostate. The duct in some cases proceeds from the 
right hemisphere of the receptaculum seminis, but in others it pro- 
ceeds directly from the apex of this inverted pear-shaped organ; it 
passes over the upper posterior portion of the prostate and then runs 
in a groove on the posterior face of the penis-sac. The upper part of 
the duct also lays in the anterior portion of a groove on the dorsal sur- 
face of the first accessory albuminiparous gland. 
The albuminiparous gland (28) is a more or less linguiform or 
elongately rounded body, occupying a position in the body anterior to 
the crop. It lies across the center of the second accessory albumini- 
parous gland and is tightly fixed to that organ by connective tissue. 
There are two glands, called the accessory albuminiparous glands, of 
somewhat questionable use, which are attached to the oviduct. These 
lie just beneath the respiratory cavity and are separated from the pros- 
tate by a distinct diaphram of strong connective tissue, which must be 
. cut away to observe the female organs. 
The second accessory albuminiparous gland (25) is a small 
rounded body placed on the oviduct posterior to the first accessory 
albuminiparous gland. It is entirely free from the oviduct except 
on one side where it is attached. The first accessory albuminiparous 
gland (24) is very large, pyriform or ovate in shape and completely 
embraces the oviduct, forming a peculiar organ of unknown function, 
although by some anatomists believed to act as a reservoir for the ova. 
These accessory glands are yellowish or whitish in color and become 
swollen and flocculent when placed in water. The female organs are 
innervated by a nerve which proceeds from the abdominal and the right 
visceral ganglia (pl. IV, fig. D). 
ORGANS COMMON TO BOTH SYSTEMS. The ovotestis or hermaphro- 
dite gland (33) occupies the upper whorls of the body and is embedded 
in the digestive gland. The hermaphrodite gland is made up of a large 
number of rounded or lobulated follicles. The ovisperm duct (32) isa 
convoluted tube of pure white color, which passes from the ovotestis 
to the under side of the albuminiparous gland where it receives a duct 
from that gland, runs along its under surface a short distance and 
finally divides to form the oviduct and the posterior portion of the 
