LEPTACHATINA. 7 



this is a thinner shell, without more conspicuous subsutural 

 striation, and with a sharper columellar lamella. At the top 

 of Mauna Loa, probably the last refuge of AchatinelUdcc in 

 western Molokai, it survived until the human period, as it 

 was found there in artificial stone piles (sweet potato hills), 

 associated with Ama-stra, Partulina d. occidentalis, and many 

 small land shells. 



L. SOMNIATOR P. & C., n. sp. PL 11, figs. 4, 5. 



The shell is perforate or closed, oblong-conic, rather thin, 

 the outlines of the spire convex below, straight near the ob- 

 tuse apex; surface faintly marked with growth-striae, which 

 are stronger below the suture. Whorls hardly convex. Aper- 

 ture somewhat piriform, the outer lip thin, obtuse, more 

 curved in its lower half; columellar margin reflected, thick- 

 ened ; columellar lamella moderately prominent in front view, 

 thin, broad and subhorizontal within. Parietal callus very 

 thin. Length 7, diam. 3.2, aperture 3 mm. ; 6 whorls. 



Molokai: near the top of Mauna Loa, at about 1350 ft. 

 elevation, with L. dormitor. Holocene (Cooke and Pilsbry). 



Constantly smaller than L. dormitor, with only a very thin 

 parietal callus. The shape also differs somewhat and the 

 columella is more thickened, but the shape of the columellar 

 lamella is nearly the same. 



L. CORNEOLA (Pfeiffer). PI. 9, figs. 1, 2. 



Vol. XXI, p. 58. Very beautiful specimens, here figured, 

 have been taken by Mr. Thaanum in Halawa. The color 

 of the last whorl is ecru-olive or between that and deep 

 colonial buff, becoming chamois on the spire. Some shells 

 have a narrow subsutural line of chestnut. Two of this lot 

 are figured. 



L. OPIPARA MANANA P. & C., n. Sllbsp. 



Surface rather strongly, regularly striate ; whorls 5~y 2 ; 

 outer lip very slightly arched forward in the middle; colu- 

 mellar fold strong, subhorizontal. Length 10, diam. 4.7, aper- 

 ture 4.1 mm. 



