1871.] F. Stoliczka— Notes on Terrestrial Mollasca. 253 



traceable on spirit specimens, but during life they are not equally 

 easily discernible. Pedicles about half the length of the body, 

 tentacles about one-fourth of the length of the pedicles, both with 

 swollen tips. Mantle conspicuously thickened near the margin, its 

 external edge very short, entire and continuous. The left shell 

 lobe is very large, entire, reflected over the edge of the outer lip, 

 and below considerably produced ; the right mantle lobe is divided 

 into two parts, the upper is linguate, narrowly produced and cover- 

 ing the base of the shell, partially also extending on to the upper 

 surface of the penultimate whorl, as in Macroehlamijs ; the lower 

 portion is shorter, somewhat folded and reflected over the colu- 

 mellar lip. The dorsal lobes are well developed and entire, the 

 left is a little larger, and both are thickened round the pulmo- 

 nary orifice ; the right considerably extends over the side of the 

 neck. Hermaphrodite opening situated at the upper, somewhat 

 outer, base of the right pedicle. The shell retractor is flattened and 

 considerably thickened, forming sharp angles, above and below, 

 with the body. Its strong development is apparently due chiefly to 

 the circumstance that the animals always crawl on hard rock. 



The general anatomical structure offers nothing very particular 

 and will be much better understood by an inspection of figure 1 , 

 on pi. xix, and by a comparison of the accompanying explanation, 

 than by a lengthened description. The anterior part of the ali- 

 mentary canal is comparatively short, the stomach extends over 

 one and a half volutions of the shell, it has no appendages. The 

 last two volutions are entirely occupied by the liver which has 

 the usual paler or darker greenish colour. The hermaphrodite gland 

 is in its original situation placed about the end of the stomach. 

 The kidney (Jc) is an elongated, rather more granular than plicated 

 gland, placed at the side of the heart, it possesses a special long 

 duct (led), accompanying the rectum, and terminating a little short 

 of the anus. 



The genital organs (fig. 2, pi. xix,) chiefly occupy the anterior 

 part of the body. The arrow sac is short and thick, with an enclos- 

 ed thick, pointed papilla. The uterus, accompanied by the pros- 

 tata, is very long, thick, the former has a yellowish colour with a 

 greenish tinge, the latter is purely white ; terminal albumin- 



