Origi}ial Descriptions of Achatinclla. 183 



peculiar to the genus Carclia of Kauai. Examination of the ani- 

 mals may prove them both aberrant forms of that genus. 



The species is very rare. We dedicate it to Mr. A. Knudseu, 

 the young naturalist who discovered it. He writes that it is of 

 very limited distribution, being found far up the mountain only 

 in an isolated tract of wood land which escaped ^he forest fires of 

 twenty years ago. In three days' diligent search he found only 

 twelve living examples. — Bald. 



Hab. Halemanu. — Bald. 



340. Achatinella cyclostoma Baldwin. 



Atnastia cyclostoma Bald. P. Ac. Phil., 1S95, p. 234, pi. xi, fig. 53. 



Shell dextral, narrowly but deeply perforated, the perforation 

 penetrating to the apex, somewhat solid, oblately globular with a 

 short conical spire, apex acute; surface lustreless, sculptured with 

 close, obliquely descending, flexuous growth lines, which become 

 concentric around the umbilicus; the embryonic whorls smooth or 

 with delicate, radiating sulcations ; color brown, darker on the 

 spire; whorls 6, the upper ones rather flat, rapidly increasing; the 

 last one large, forming the greater part of the shell, strongly angled 

 at the peripher\', the angle becoming almost obsolete towards the 

 aperture, deflexed in front a trifle below the carina, surface above 

 the angle flat, slightly convex towards the aperture, and rounded 

 below the angle ; suture well impressed ; aperture very oblique, 

 sinuately circular, a small segment cut off by the penultimate 

 whorl, livid-white within, exhibiting the exterior coloring through 

 its substance; peristome rather obtuse, slightly thickened within; 

 unreflecled, extremities slightly converging and united by a very 

 thin callosity; columella livid-white, broad and flat, terminating 

 in a slight, flexuous plait. Altitude 15, diam. 18 mm. 



Hab. Makaweli.— Bald. 



341. Achatinella rugulosa Pease, 



A. rugulosa P.se. P. Zool. Soc. London, i86g, p. 649; J. Conch., xviii,, 1870, p. 95. 



T. ovato-conica, crassa, rimata, oblique ruj^cso-striatula, epideniiide ru- 

 gosa, brunnea induta, sub epidermide castanea, ad inarjfineni labii tt circa 

 basin albida, apice nigricans; anfr. 6 convexis, interduni vix inflalis; sutura 

 impressa; apertura ovata, verticalis; plica columellaris valida, callosa, com- 

 pressa, fere transversalis; labro incra.ssato. Long. 12, diam. 9 mm. 



Shell ovate-conic, thick, with an umbilical cleft, obliquely 

 rugose-striated, furnished with a rough, brown epidermis, under 

 the epidermis chestnut colored, at the margin of the lip and around 

 the base whitish, apex blackish ; whorls 6 convex, .sometimes 

 scarcely inflated; suture impressed; aperture ovate, vertical; colu- 

 mellar fold strong, thickened, compressed, almost transverse; lip 

 thickened. 



Hab. Kayjda. — Bald. 



