LEPTACHATINA, GROUP K. 57 



Lanai : mountains behind Koele (Perkins), at high alti- 

 tudes (Thaanum). 



Leptachatina perkinsi SYKES, Proc. Malac. Soc. London, 

 ii, 1896, p. 128; Fauna Haw., ii, p. 367, pi. xi, fig. 30. 



"This and L. smithi are very closely allied, and may be 

 separated by the fact that L. smithi is of a lighter color, 

 smaller size, and is a trifle wider in proportion to its length. 

 In L. smithi the last whorl is slightly longer in proportion 

 to the total length of the shell." (Sykes.} The original 

 figure is copied. 



A fine series of this species was collected by Mr. Thaanum. 

 They are very glossy, and vary from a light corneous to a 

 dark resinous color. He writes that : ' the large colored 

 shells are mostly from the higher altitudes, the smaller from 

 the gulches." The latter are L. smithi Sykes. A series of 

 L. perkinsi averaged 11.5 x 5.5 mm. A peculiar abnormal 

 specimen, almost cylindrical in form, with 7^ whorls meas- 

 ured 16.0 x 5.9 mm. 



A peculiar color variety is also in Mr. Thaanum 's collec- 

 tion. The shells are a greenish corneous with a narrow 

 brown band at the suture and sometimes a broad brown band 

 at the periphery. They are smaller than the other specimens 

 of perkinsi but have the blunt apex of this species. 



72. L. LONGIUSCULA n. sp. PI. 11, fig. 11. 



The shell is imperforate, elongate, narrowly conical, yellow- 

 ish corneous, the neanic whorls distinctly costate, especially 

 near the sutures, the last whorl nearly smooth, under a lens 

 minutely striate with lines of growth. Spire narrowly coni- 

 cal, apex subacute. Suture impressed, simple. Whorls '7, 

 slightly convex, increasing very slowly and regularly, the 

 last subcylindrical, tapering towards the base. Aperture 

 pyriform, narrow, very slightly oblique, almost perpendicular. 

 Golumella broad above, truncate below, with a fairly strong 

 oblique fold almost extending to the margin, and an acute 

 callus along its face. Outer lip thickened within, regularly 

 arched, forming a subacute angle with the columella; colu- 

 mellar margin thickened, appressed, adnate; both margins 



