SPECIAL ANATOMY. 231 



rived from a granular, glandular organ combined with 

 the testicle in the posterior lobe of the liver. 



SucciNEA. The testicle is not separated into distinct 

 fasciculi bj the parenchyma of the liver as in Helix, but 

 forms a single mass. The epididymis is very much con- 

 voluted, and appears always to be distended with sperm- 

 atic matter. The prostate gland is unusually short, 

 occupying the upper half only of the length of the ovi- 

 duct, and is thick, clavate, and more or less colored by 

 pigmentum nigrum cells upon the surface. The penis 

 is long, cylindroid, curved downward at its upper part, 

 and is joined at its summit by the vas deferens. The 

 retractor muscle is inserted into the penis a short dis- 

 tance below its summit. The genital bladder is large 

 and globular ; its duct is nearly as long as the oviduct, 

 and is narrow. The vagina is moderately long and mus- 

 cular. The cloaca is short. 



Glandina. The testicle is an oval mass, separated 

 from the Uver as in the Limaces. The epididymis ap- 

 pears from a hilum in the side of the testicle ; at first 

 but slightly tortuous, it becomes convoluted just before 

 ending. Its accessory glandula is large. The penis is 

 long, large, and clavate, very gradually enlarging from 

 the base to the summit. The vas deferens, which joins 

 the latter point, is long, moderately tortuous, and wide. 

 The retractor muscle is inserted into it near its ter- 

 mination in the penis. The bladder is oval, constricted ; 



