ACHATINA.— Plate XVII. 



The Cassia Achatina. Shell elongately subulate, apex 

 somewhat papillary, whorls fourteen to fifteen in 

 number, flat, obliquely very closely and somewhat 

 rudely sculptured with rib-like striae, sutures im- 

 pressed, columella arched, abruptly trimcated ; 

 whitish, covered with a thin olive-brown epidermis. 



Benson, MSS. 



Hob. Cassia Hills, North East Fi-ontier of Bengal; 

 Dr. Griffith. 

 The rib-like stria; of this fine species, contributed by 



Mr. Benson, have an oblique plicate growth. 



Species 86. (Mus. Cuming.) 



Achatina sulcata. Aeliat. testa elongato-iurritd, an- 

 fractiMs decern, oblique creberrime costulato-striatis, 

 an/ractu ultimo bad angulato, infra unguium striis 

 minus promhmitibus, columella, arcuatd ei eotitortd, 

 parum truncatd ; virente-stramined, 



The gkooved Achatina. Shell elongately turreted, 

 whorls ten in number, obliquely very closely striated 

 after the manner of fine ribs, last whorl angled at the 

 base, striae beneath the angle less prominent, colu- 



mella ai-ched and twisted, but little truncated ; 



greenish straw-colom-. 

 Gray, Annals of Philosophy, New Series, vol. ix. p. 415. 

 Eab. West Indies. 



I much doubt if the^. striattila of Eang is not a variety 

 of tills species, although the stria,- are finer and closer 

 together. 



Fig. 87. OIus. Cuming.) 

 The shell here represented illustrates another form of 

 A. slriaiella, in which the colimiella is shorter and of 

 more callous substance. 



Kg. 88. (Mus. Cuming.) 

 This shell, an authentic specimen of Dr. Gould's A. in- 

 volttta, from Cape Palmas, proves to be identical with 

 A. Frascri. 



Por Achatina Sp. 87 and 88, see PI. XXI. 



