418 On the Anatomical Structure of 



voluminous, of an irregular form, terminating anteriorly in a 

 cul-de-sac ; and posteriorly becoming very much contracted 

 in its diameter, and ending in the second or muscular portion. 

 This last, e, is very small, compared with the preceding, and 

 is distinguished by its thick and muscular walls, which form 

 an irregular triangular mass. Between the muscular portion 

 and the intestine there is a third cavity, i, with very thin 

 parietes, which appears to be nothing more than a dilatation 

 of the intestine which commences here. The intestine is of 

 an uniform size, slightly convoluted, and but a small portion 

 of it enveloped by the liver ; its terminal portion passing 

 along the right border of the respiratory sack, terminates in 

 the respiratory or face under the anterior edge of the collar, 

 (fig. 1, a). 



The liver is less voluminous than that of the Helices, is 

 composed of a larger and a smaller lobe, (»• g, fig. 2,) the 

 first occupying the larger portion of the posterior whorls of 

 the shell. Both lobes discharge their secretions into the 

 muscular cavity of the stomach, by one and the same duct ; 

 in the genera Limax, and Helix, there are two. 



The kidney, or depuratory organ, is attached to the supe- 

 rior walls of the respiratory sack, and is remarkable for its 

 elongated form ; a portion of it is shown in fig. 1, c, and in 

 fig. 3, a, it is shown entire, with its excretory duct, (J) b.) The 

 glandular portion has a crescentic form, largest anteriorly, 

 where the excretory duct commences. The excretory duct 

 passes along the parietes of the sack, in a direction parallel to 

 the gland, gradually diminishing in size for a short distance, 

 (fig. 3, b b,) after which it passes to the rectum, to which it 

 becomes loosely united, and with which it terminates at the 

 respiratory orifice. Numerous vessels are seen on the surface 

 of the respiratory sack, directed towards, and connected with 

 the organ which we have denominated the kidney, on the 

 authority of Blainville, and others, and where the blood is 

 supposed to undergo the depuratory process. 



The respiratory sack (fig. ], b b d,) has the same position 

 as in the Helices, from which it difl^ers but little, excepting in 



