54 HELIX. 



Yar. SUBLJEVIS, Westerlund. 



Costse obsolete, without cilise, lip rose-colored. 



H. PERACANTHODA, Bourg. PL 22, figs. 20-22. 



Narrowly perforate, brownish, costate, the costre lamelliform 

 on the last whorl and spinously prolonged on the periphei^ ; 

 whorls 4, convex, rapidly enlarging, periphery angulated. 



Alt. 1-5 mill. 



Abyssinia. 



First described b}- Bourguignat as H. Raffrayi, preoccupied 

 by Tapparone-Canefri. 



H. HARPA, Say. PI. 9, figs. 13, 14. 



Subperforate, very thin, slightly striate, distantly plicate, 

 pellucid, olivaceous corneous ; whorls 4, convex, the last 

 rounded. Alt. 3-5, diam. 2 mill. 



Northern United States, Labrador, Siberia, Sweden, etc. 



The synonyms are Pupa costulata, Mighels, H. Amurensis, 

 Gerstf. It is viviparous, and is the type of Morse's genus 

 Zoogenetes. 



H. SPINIFERA, Mousson. PI. 9, figs. 15-17. 



Yery minutety perforated, rather thin, corneous yellow, pel- 

 lucid, with remote lamellate striae, and long membranaceous 

 cilice; whorls 3^, convex, the last not descending, rounded or 

 rounded-angular on the periphery, base subtumid around the 

 perforation; lip ver} T slightly expanded, the extremities con- 

 verging;, united by a thin callus. Diam. 1*75 mill. 



DO' v 



Ins. Palma, Canaries. 

 H. LAMELLATA, Jeffreys. PI. 9, figs. 18, 19. 



Perforate, beautifully membranously costulate, wax}', cor- 

 neous; whorls 5, subequal ; aperture depressed, lunar. 



Diam. 2*3 mill. 



England, Ireland, Sweden. 



It is H. Scarburgensis, Turton, and H. seminulum, Rossm. 



H. MONAS, Morelet. PL 9, figs. 20, 21. 



Perviously umbilicated, striolate, waxy, fulvous; whorls 4, 

 subequal, convex, lateral!}' compressed, suture profound. 



Diam. 2 mill. 



Ins. San Miguel, Azores. 



