634 W. M. SMALLWOOD AND ELIZABETH G. CLARK 



number of nerves, as well as the number that arise from each 

 ganglion. The apparent origin of the nerves as well as the rela- 

 tion of the ganglia to each other is variable. In some of the speci- 

 mens studied the three pairs of gangha comprising the nerve 

 collar were so closely crowded together that it was well nigh im- 

 possible to discover their true relations. 



The visceral or sympathetic part of the nervous system, as 

 stated above, communicates with the cerebral nervous mass by 

 means of a nerve (n.vsc.) from the right pleural ganglion. This, 

 the visceral portion of the nervous system, consists of an irregular 

 system of exceedingly fine nerves spreading entirely over the vis- 

 cera and containing numerous small ganglia distributed along 

 their course. 



REPRODUCTIVE SYSTEM 



The reproductive system is made up of two main portions ; one, 

 known as the anterior genital mass, is an irregularly rounded 

 body made up of a complex of tubules, cavities and ducts, lying 

 at the right anterior end of the body cavity; the other, the pos- 

 terior genital mass, is the hermaphroditic gland, which spreads 

 over the liver and is joined to the anterior genital mass by the 

 hermaphroditic duct. The size and shape of both of these por- 

 tions varies greatly at different seasons of the year, being enor- 

 mously enlarged during the breeding season, the time at which 

 this material was collected. 



The posterior genital mass 



The hermaphroditic gland spreads over the entire surface of 

 the liver, from which it may be distinguished by its lighter color. 

 It is made up of numerous lobules opening into a series of minute 

 tubules, which finally emerge into two large ducts; these unite to 

 form the hermaphroditic duct. In this gland both eggs and 

 sperm have their origin. As the hermaphroditic duct (fig. 6, 

 dt.her.) leaves the gland, it passes to the anterior genital mass, 

 which it enters on the median side. It immediately enlarges 

 into a thickened tube, the ampulla {a?np.), which is 2 mm. wide 



