X ANATOMY OF ACHATINHXE. 



being conspicuous, especially on the sides, less so in the 

 middle. There seems to be no distinct dorsal groove or 

 grooves. The face is granulose. Small labial projections are 

 at each side of the mouth. The top of the foot, in some speci- 

 mens, is a little flattened behind by pressure of the shell, but 

 there is no such specialized area as has been noticed in Archa- 

 chatina. The mantle-edge bears small right and left lobes, 

 and a small right body-lobe. 



The lung (pi. 64, fig. 64, A. chrysoleuca) is short, densely 

 veined on both the cardiac and intestinal sides. The pul- 

 monary vein has no large branches. The kidney is oblong, 

 double the length of the pericardium, and the gut ureter is 

 closed throughout. In A. panthera Wiegmann found the 

 kidney to be three times the length of the pericardium. The 

 jaw of A. panthera (pi. 62, fig. 24) is closely and finely stri- 

 ate vertically. That of A. chrysoleuca is much more coarsely 

 and irregularly so. 



The radula has 77,1,77 teeth in A. chrysoleuca (p. ix, fig. 

 6). The central tooth has no cusp in any part of the radula. 

 The laterals have large conic mesocones, well-developed ecto- 

 cones and more or less obsolete vestiges of entocones. In the 

 outer marginal teeth the inner cusp is bifid (entocone -|- 

 mesocone). In A. panthera (pi. 62, figs. 22, 23) Wiegmann 

 counted 88,1,88 teeth. The central showed a quite rudiment- 

 ary denticle; but in young animals he found a small cusp 

 with minute protuberances on each side, indicating a degen- 

 erate tricuspid tooth. The lateral and marginal teeth are not 

 unlike those described for chrysoleuca. 



The genital system of A. panthera ha been figured by 

 Wiegmann (pi. 63, figs. 30, 32). The penis is enclosed in a 

 glossy sheath and is fusiform below. The vas deferens enters 

 through the wall of the sheath and passes upward out of its 

 upper orifice, making a free loop, to which the retractor 

 muscle is attached (fig. 30, Mr.)< The vagina is very long 

 (38 mm.) ; the duct of the spermatheca quite short, 15 mm. 

 long, the spermatheca somewhat shorter. 



A. fulica, dissected by Semper, is similar to A. panthera in 

 genitalia (Reisen, Landmoll., pi. 12, f. 17). 



