SMITH : DESCRIPTIONS OF NEW SPECIES OF HELIX, ETC. 99 



et supra castas ortiati, ultimus ad peripheriam carina fortissima, 

 rotundata, valde prominente dimidiatus, infra carinam hand 

 costatus, inodo spira liter striatus : a pert ura obliqua, acute elliptica, 

 longit. totius § adcequans, supernc leviter canaliculata, inferne 

 infra columellam, canalem obliquam, distinctam formans ; 

 labrum incrassatum, arcuatuni ; columella obliqua, callo 

 erassiusculo, super ne labro juncto, induta. Longit. 16 millim,, 

 diam. 8. Apertura 6 longa, 3 lata. 



Habitat : Baudin Island, N.W. Australia (J. J. Walker). 



This very remarkable species is distinguished not only 

 by its unusually large size, but by the tabulated spire, 

 the strong upright costae, and the prominent keel at the 

 periphery. The upper portion of the spire, consisting of 

 five whorls, forms a regular bluntish cone with sloping 

 and unturreted sides. It is ornamented with numerous fine riblets, 

 which, by degrees, become stronger and more remote upon the 

 lower whorls which are conspicuously tabulated and angled above. 

 The ribs are interrupted at the angle and there connected by a ridge 

 which forms an elevated border. Upon the body-whorl they do 

 not reach quite to the very conspicuous keel around the middle. 

 The entire surface is very finely spirally striated, but usually upon 

 the upper whorls and upon the ribs of the lower whorls in worn 

 specimens, the striae become more or less indistinct. They are, 

 however, always to be seen between the costas and upon the lower 

 half of the body-whorl. 



I have named this remarkable species after Mr. J. J. Walker, 

 chief engineer on H.M.S. Penguin, to whom the British Museum is 

 indebted for most valuable collections from various parts of the 

 globe. 



Actaeon reevei. 



Tortiatella suturalis part. Reeve, Conch. Icon., vol. xv., pi. II, 

 f. 9 a-b. 



Testa breviter ovata, supernc acuminata, roseo-grisea, punctis 

 nigris picta ; anfractus 7 burriti, teviter convtxiusculi, sutura 

 subcanalicnlata sejuncti, iransversim sulcati, sulcis augustis, 

 longitudinaliter striatis, in aufract. penult. 3-4, in ultimo circa 15 ; 

 spira brevis, conica, acuta ; apertura elougata, auriformis, longit. 

 totius I adcequans, intus seriatim obscure nigro-punctata ; 

 columella coutorta, iucrassata, alba, bifida. Longit. 14 millim., 

 diam. S. Apertura 9 longa, 3 lata. 



Habitat : — ? 



