CELLAR SLUG. 383 



n. Portion of dorsal integument, an incision immediately to the right 

 of which would disclose the shell. Internally to it is the respiratory 

 sac, with the ramifications of the pulmonary veins. 



o. Renal organ, placed to the right of the heart in the natural position 



, of the parts, and giving off a duct which passes backwards, to run 



in company with the rectum and open near the anus. See enlarged 



figure by Professor Leidy in Binney's Terrestrial Molluscs of the 



United States, vol. i. PI. I. Fig. iv. 



p. Ventricle of bilocular heart. 



q. Hermaphrodite gland. 



r. Hermaphrodite duct. 



s. Albuminiparous gland. 



t. Vas deferens becoming distinct from oviduct v sooner than in Helix 

 or Arion, and richly beset with prostatic glandules. 



. Penis, with part of its retractor muscle left attached to it ; the muscle 

 originates at a spot on the under surface of the muscular envelope 

 of the viscera, close to the arterial outlet of the heart. 



v. Oviduct, like the vas deferens, glandular above, and membranous 

 below ; and opening ^into a dilated vagina. 



w. Receptaculum seminis, opening in this species, though not in the 

 closely allied Limax cinereus into the vagina. 



x. Pedal portion of the suboesophageal nerve mass, enclosing, together 

 with the visceral, an orifice through which the anterior aorta passes. 

 The line is drawn to a spot where in Helicidae the otic vesicle is 

 readily found, but where in Limax it is not easy to convince oneself 

 that it exists, even as a rudimentary organ, without the use of 

 reagents, such as the oxalic acid recommended by de Lacaze 

 Duthiers. 



y. Coecum passing off from intestine just before it comes into relation with 

 the pulmonary cavity, and extending back nearly to the termination 

 of the body cavity. 



z. Retractor muscle of the buccal mass and tentacles. Its fascicles pass 

 with the oesophagus through the nerve-collar. They have been cut 

 away in this Preparation. 



Anatomical and general account of Limacidae, Simroth, Nacktschnecken, &c. 

 Z. W. Z. xlii. Figures of the anatomy of Limax, Leidy, Binney's Terrestrial Molluscs 

 of the United States, i. PI. I. 



Reproductive system, Baudelot, A. Sc. N. (4), torn, xix., 1863, PI. III. Fig. 17. 



