HELIX. 21 



closely allied to that species. The earlier described H. flocculus, 

 Morelet, is probably the young of this species. 



H. CRONKHEITEI, Newcomb. PL 3, figs. 8t, 88. 



Subdepressed, a little convex above, costulate striate, yellow- 

 ish corneous ; whorls 4, suture wide and deep, almost channeled, 



umbilicus large, perspective. Diam. 5 mill. 



Oregon, Alaska. 



More elevated, striae stronger, suture deeper than in H. 

 ruder ata ; of which it is very probably a mere variety. 



H. HORNII, Gabb. PL 3, figs. 89, 90. 



Openly umbilicated, depressed, brownish, minutely obliquely 

 striate, and (rarely) sparsely hairy ; whorls 4J, the spire whorls 

 subplanulate, the last rapidl} 7 descending, suture deep ; umbilicus 

 about one-third the total diameter, indistinctly perspective. 



Diam. 4 mill. Arizona. 



According to Mr. Ancey this species occurs also in Honduras. 



H. FRIVALDSKYANA, Rossmassler. PL 3, figs. 91-93. 



Perspectively umbilicated, lenticularly depressed, obtusely 

 carinated, yellowish white, lightly costulate-striate ; whorls 5, 

 convex. Diam. 9 mill. 



Eoumelia. 



Is H. convexa, Fer. 



H. ABIETANA, Bourg. PL 4, figs. 45-47. 



Widely umbilicated, somewhat solid, translucent, corneous, 

 flamed with fulvous, strongly costulate; whorls 6, convex, slowly 

 increasing, suture deep, last whorl with obtusely subangulated 

 periphery, not descending in front. Diam. 5 mill. 



Algiers. 

 H. ARROUXT, Bourguignat. PL 4, fig. 56-58. 



Openly umbilicated, depressed, fragile, subpellucid, thinly 

 striulate ; fulvous chestnut, maculated with whitish, apex 

 shining, blackish ; whorls 5^, a little convex, suture well im- 

 pressed, last whorl obscurely subangulated, base convex. 



Diam. 6 mill. 



Berytus, Syria. 

 H. CONCINNA, Lowe. PL 3, figs. 94-96. 



Widely umbilicated, rather solid, scarcely shining, light 

 greenish corneous, closely plicate-cost ulate above, suture mod- 



