ACH ATINA 
Plate V. 
Species 16. (Mus. Cuming.) 
Achatina allisa. Achat, testa, elongato-oblongd, subcy- 
lindraced, anfraetibus septeni, oblique snbtiliter gra- 
nato-striatis, infra suturas teniie crenulatis, apertura 
parvimcula ; columella arcuatd, subcontorta , abrupte 
truncatd; olivaceo-lutescente, maculis rufo-castaneis 
oblongis hie illic irregulariter inquinatd. 
The bruised Achatina. Shell elongately oblong, some- 
what cylindrical, whorls seven in number, obliquely 
finely granosely striated, finely crenulated beneath 
the sutures, aperture rather small ; columella arched, 
slightly twisted, abruptly truncated; olive-yellow, 
here and there irregularly bedaubed with reddish 
chesnut blotches. 
Hah. Cape Palmas, West Africa. 
This species may be readily distinguished from any of 
those hitherto described, by its oblong cylindrical form and 
peculiar style of irregular blotching. The aperture is pro- 
portionably smaller and narrower than in the allied species. 
Species 17. (Mus. Cuming.) 
Achatina bicarinata. Achat, testa oblongo-ovata , cras- 
9 
siuscula, anfraetibus sex ad septem, concentrice plicato- 
striatis, ultimo inf erne obscure bicarinato ; columella 
subarcuatd, fortiter truncatd ; intensb purpurea, apice 
albicante, fusco obscure fulguratd, apertures fauce cce- 
rulescente-alba. 
The two- keeled Achatina. Shell oblong-ovate, rather 
thick, whorls six to seven in number, concentrically 
plicately striated, last whorl obscurely two-keeled 
towards the lower part, columella arched, strongly 
truncated; deep purple, whitish towards the apex, 
marked with obscure brown waves, interior of the 
aperture bluish-white. 
Lamarck, Anim. sans vert. (Deshayes’ edit.) vol. viii. 
p. 296. 
Bulla bicarinata , Dillwyn. 
Bulimus bicarinatus, Bruguiere. 
Cochlitoma bicarinata, Perussac. 
Bulla achatina dnistrorsa maxima, Chemnitz. 
Achatina sinistrorsa, Pfeiffer. 
Hub, Prince’s Islands, West Africa. 
The keeled growth of this shell is very obscure and not 
always perceptible. The name sinistrorsa was not given to 
the species by Chemnitz as a technical specific appellation ; 
it merely formed part of his diagnose. 
February, 1849. 
