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 spcrmatheca (also called swammerdamian 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 (pi. 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) is a 

 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 



