AGHATINA.— 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-b'ke striae, sutures im- 
pressed, columella arched, abruptly truncated ; 
whitish, covered with a thin olive-brown epidermis. 
Benson, MSS. 
Rah. Cassia Hills, North East Frontier of Bengal; 
Dr. Griffith. 
The rib-like striae of this fine species, contributed by 
Mr. Benson, have an oblique plicate growth. 
Species 86. (Mus. Cuming.) 
Achatina sulcata. Achat, testa elangato-turritd, an- 
fractibus decern, oblique crebcrrime costulato-striatis, 
anfractu ultimo bad angulato, infra angulum striis 
minus prominentibus, columella, arcuata et contorta, 
parum truncata ; virente-stramined. 
The grooved 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 arched and twisted, but little truncated ; 
greenish straw-colour. 
Gray, Annals of Philosophy, New Series, vol. ix. p. 415. 
Sab. West Indies. 
I much doubt if th e'A. striatella of Bang is not a variety 
of this species, although the striae are finer and closer 
together. 
Fig. 87. (Mus. Cuming.) 
The shell here represented illustrates another form of 
A. striatella, in which the columella is shorter and of 
more callous substance. 
Fig. 88. (Mus. Cuming.) 
This shell, an authentic specimen of Dr. Gould’s A. in- 
voluta, from Cape Palmas, proves to be identical with 
A. Fraseri. 
For AchatinaSp. 87 and 88, see PI. XXI. 
