POLYGYRA ALBOLABEIS AND LIMAX MAXIMUS 279 



Salivary glands. The salivary glands are situated on the anterior 

 part of the crop, the one dorsally and the other latero-ventrally. 

 They vary in shape and size (pi. 23, fig. 5, 6) the dorsally situated 

 one being the smaller. They consist of numerous lobuli, which 

 are conglomerate. From each gland proceeds a conspicuous duct, 

 which enters the buccal body, one on each side of the esophagus. 



Digestive gland. The digestive gland consists of three principal 

 lobes, divided into lobules. It, in conjunction with the ovotestis, 

 occupies the posterior part of the animal, and also invests the 

 greater part of the stomach, and the posterior lateral part of the 

 crop. See plate 15, figure 3, for its position, and plate 23, figures 7 

 and 8, for its form. 



Generative system 

 Plates 15, n 



The general appearance of the generative organs is the same as 

 inPolygyra, varying only in details, with the exception of the 

 ovotestis. 



The penis and anterior part of the other organs pass obliquely 

 over the anterior part of the crop (pi. 15, fig. 2), a part of the ute- 

 rine canal and spermatic duct lying ventrally and to the left of 

 the crop. The ovotestis is situated at the posterior end of the 

 animal, on the dorsal part of the digestive gland. 



The penis is a long, cylindric body, comparatively much longer 

 than in Polygyra albolabris. The posterior end is 

 curved and bent on itself. It is destitute of the outer fold or 

 so-called prepuce existing in P. albolabris. 



The retractor muscle of the penis is long andi inserted, together 

 with the vas deferens, on one side slightly anterior to the ex- 

 tremity. 



When exserted, a thin, erect membrane is shown extending 

 backward from the meatus; and also membranous folds at the 

 meatus. 



The vagina and receptaculum seminis are much smaller than in 

 P. albolabris. 



The vas deferens is short, its length being equal to or less than 



