Original Descriptions of Achatinella. 107 



surface delicately striated with lines of growth ; colour a dusky 

 chestnut, marbled with white, irregular, and angular markings, 

 generally arranged somewhat in longitudinal stripes, the whole 

 seeming to be coated with a very thin ash-coloured epidermis. 

 Aperture moderately large, ovate, the lip slightly expanded ; the 

 columellar fold white, compressed, nearly transverse, and standing 

 out very prominently. Length 7-8, breadth 1-2 in. — U. S. Ex. 

 Ex., vol. xii, p. 85. 



Animal light pea green, strongly granulated, one-third longer 

 than the shell, tentacles light slate ; mantle and base of foot same 

 color as the body. Dr. Pfeiffer allows marmorata Gould, but places 

 adamsii Newc. as a synonym of A. perdix Rve. I have clearly 

 established the identity of my shell with that of Dr. Gould, and do 

 not doubt the specific difference of marvwrata and perdix. As Mr. 

 Reeve's description dates 1850, those who do not concur in this 

 opinion must place A. perdix as a synonym of A. marmorata . 

 — Newc. 



Hab. At the foot of Mt. Haleakala.— Gould. Makawao. 



This shell is very rarely sinistral. In over one thousand ex- 

 amples only one sinistral specimen was found. 



172. Achatinella adamsii Newc. 



A. adamsii P. Zool. Soc. London, 1853, p. 137, pi. xxii, fig. 20. 



Shell dextral, conically acuminate, whorls 6, finely striated 

 transversely, roughly striated longitudinally ; suture deeply im- 

 pressed ; lip expanded ; columella terminating in a strong abruptly 

 twisted plait ; interior of shell of a leaden blue colour, exterior 

 dark chestnut, irregularly mottled and striped with white. Long. 

 18/20, lat. 9/20 poll. 



This species makes the nearest approach in form to A. perdix 

 of Reeve, an immature specimen of which is figured in his Mono- 

 graph, figure 43. The locality of this latter species is the almost 

 inaccessible ravines of the mountainous districts around Eahaina, 

 W. Maui. The A. perdix is arboreal, and the A. adamsii terres- 

 trial in its habits. — Newc. 



Hab. Makawao. 



Baldwin places this with A. marmorata Gould. 



173. Achatinella plumbea Gulick. 



A. plumbea Gk. Ann. Lye. New York, iv, 1S56, p. 213, pi. vii, fig. 39. 



Shell dextral, sometimes perforate, ovate-conic, solid, shining, 

 irregularly striated, very finely decussated, lead-colored, with a 

 white baud on the periphery of the last whorl ; apex subacute ; 



