1913.] NATURAL SCIENCES OF PHILADELPHIA. 691 



where the ureter (PI. XXXI, fig. 5, u) bends abruptly upon itself. The 

 external openings of the ureter and intestine occupy the usual 

 positions on the right side, and from this point pursue a course 

 parallel to the external surface of the body in close contact with the 

 mantle cavity. As noted previously^ the ureter bends sharply upon 

 itself at the termination of the mantle cavity, and, dorsally placed 

 with reference to this chamber, proceeds anteriorly to unite with the 

 forward extremity of the kidney. This last-named body is a com- 

 pact, sac-like body consisting, as usual, of highly folded glandular 

 epithelium confined, in the posterior half of the organ, to the outer 

 face. As may be seen in the diagram (PI. XXXI fig. 5), the peri- 

 cardium (p) is in contact with this glandular section throughout its 

 entire length, but is scarcely more than half as extensive. The 

 reno-pericardial opening was not observed. It may be added that 

 the kidney is placed dorsally with reference to the pericardium. 



The reproductive system, considering that the gonad is in a 

 highly quiescent state, is comparatively large and more compact 

 than in Anostoma. The gonad consists of several slender diverticula 

 (probably three times as many as are indicated in PI. XXXI, fig. 1), 

 located in the apical whorls of the visceral mass. These contain 

 primitive sex cells undifferentiated into sperms and ova. The 

 hermaphroditic duct extends ventrally, close to the columella, and 

 shortly before entering the accessory glands attaches to a slender 

 pear-shaped organ, possibly a seminal vesicle, consisting of upwards 

 of ten small diverticula imbedded in a muscular sheath. These are 

 empty and give no sign of glandular activity. The accessory glands 

 are volummous, though inactive organs, whose general extent is 

 indicated in PL XXXI, fig. 1, ag, though several lobes give them a 

 much greater dorso-ventral thickness than can be shown in the 

 figure. The duct leading from the accessory glands becomes con- 

 siderably widened near its proximal extremity, and possibly functions 

 as a shell gland. As in Anostoma, the duct from the seminal recep- 

 tacle springs from this point, and, as a slender canal, proceeds to the 

 spacious sack situated in close proximity to the accessory glands. 

 The vas deferens, likewise, unites with the penis some distance from 

 its distal extremity, thus forming a flagellum (PL XXXI, fig. 1). No 

 penis retractor has been discovered in this region. On the other 

 hand, several strands attaching to the penis sheath in the neighbor- 

 hood of the outer opening may operate as retractors. 



The digestive system is sufficiently illustrated (PL XXXI, fig. 5) 

 to require no further explanation beyond the statement that three 

 distinct bile ducts open into the stomach. 



