ANATOMY OF ACHATINHXE. Xlll 



In A. leucostyla (pi. 64, figs. 65, 66) the loop of the vas 

 deferens does not extend out of the penis sheath (fig. 66). 

 The vagina is short, and the spermatheca ( fig. 65, sp. ) and its 

 duct very long. It differs conspicuously from pantkera in 

 these characters. 



In A. chrysoleuca (pi. 64, fig. 68) the penis is similar to 

 that of leucostyla, but longer. The spermatheca duct is also 

 long (concealed in the figure). The relations of the penis, 

 vas deferens and retractor are otherwise the same as in A. 

 panthera. 



The retractor muscle of the penis, in all species examined, 

 is a branch from the right ocular band. 



The subgenus Leptocala (vol. xvii, p. 72) is unknown ana- 

 tomically. 



METACHATINA (vol. xvi, p. 307). Anatomy unknown. 



COCHLITOMA (vol. xvii, p. 76). The type species, C. zebra 

 has been dissected by Semper. There are two separated cer- 

 vical lobes on the left margin of the mantle. Kidney band- 

 shaped. Grenitalia as in Achatina, the vas deferens penetrat- 

 ing a sheath, the spermatheca being short-stalked. It is vivip- 

 arous. In the uterus were found about 60 undeveloped eggs 

 with calcareous shells, the smallest 3 mm., the largest 6 mm. 

 long; then 25 embryos, which had freed themselves of the 

 egg shell (pi. 64, fig. 67) . On the foot they had a large podo- 

 cyst, in the younger ones enveloping the shell like a mantle. 



Jaw of C. zebra with a few broad welts, separated by very 

 wide furrows, even-edged. That of A. granulata is described 

 by Semper as coarsely ribbed. Teeth as in typical Achatina, 

 in C. zebra 126 to 130 in a transverse row. In A. granulata 

 there are 116 to 128 teeth. 



In C. granulata, examined by Semper, the kidney was 

 found to be double the length of the pericardium, band- 

 iShaped. The penis is of normal Achatina structure, its re- 

 tractor muscle a branch of the right ocular band. 



In C. crawfordi (Morel.), which I have dissected (pi. 64, 

 figs. 69, 70, 71), the penis is a large, thin- walled sack with 

 terminal retractor (fig. 71). The vas deferens enters at its 

 lower third and continues upward inside as a fleshy pilaster 



