138 



THE NAUTILUS. 



This and the following species were discovered by Prof. H. W. 

 Henshaw of Washington, D. C. He found them in deposits of fossil- 

 ized shells at a place called Mana. The existence of living ex- 

 amples of either of these species now, or within any recent period, is 

 highly improbable. 



A?nastra (Laminella) sinistrorsa, n. sp. 



Shell fossil, sinistral, imperforate, thin, acuminately turrited, spire 

 conical ; apex subacute ; surface sculptured with delicate growth 

 lines, embryonic whorls radiately sulcated. Color of living shell un- 

 known. Whorls G, convex, suture well impressed. Aperture oblique, 

 sinuately oval. Peristome simple, very thin. Columella terminat- 

 ing in a slightly developed lamellar plait. 



Length, 14^; diam., 6^ mm. 



Habitat, Hamakua, Island of Hawaii. 

 Amastra {Laminella) lava, n. sp. 



Shell sinistral, imperforate, rather thin, conically turrited, apex 

 acute ; surface striated with fine incremental lines, embryonic whorls 

 with delicate radiating sulcations, color brown, with irregular 

 patches of a dark fugacious epidermis. Whorls 6, somewhat con- 

 vex ; suture well impressed. Aperture oblique, oval, livid-white 

 within. Peristome simple and thin. Columella terminating in a 

 thin lamellar plait. 



Length, 12; diam., 5 mm. 



Habitat, Haleakala Mt., East Maui. 



This species is the counterpart of Laminella soror, Nc. found on 

 West Maui, but the latter is a larger and more obese shell. 



NOTES ON CARYCHIUM AND DESCRIPTION OF A NEW VARIETY. 



BY GEO. H. OLAPP. 



In examining a series of Carychium recently, I noticed that there 

 is a large northern race of C. exile Lea which is found from Maine 

 to Winnipeg, Manitoba, the latter being the most western point from 

 which I have material. It differs from typical exile by its greater 

 size, which is very constant throughout its range. Topotypes of C. 

 exile from Wissahickon Creek, Philadelphia, Pa., kindly loaned me 



