51 
10. Hevrx mepiocris. HUH. testa vir subperforata, depressa, dis- 
coidea, tenui, levigata, albido-hyalina; spira subplana; sutura 
impressa, submarginata ; anfract. 4, vie convexiusculis, sensim 
accrescentibus, ultimo antice subdilatato, non descendente, rotun- 
dato, basi subexcavato ; apertura verticali, late lunari ; perist. 
simplice, recto, marginibus subconniventibus, dextro fortiter, ba- 
sali leviter arcuato. 
Diam. maj. 5, min. 44, alt. 22 mill. 
Hab. Santa Ana, New Granada. 
11. Hexrx Swirri. H. testa angustissime umbilicata, convexo- 
depressa, tenui, confertim capillaceo-striata, sericea, fusco-cornea ; 
spira parum elevata, vertice subtili ; sutura impressa ; anfract. 4, 
vix convexiusculis, sensim accrescentibus, ultimo non descendente, 
rotundato, peripheria obsolete angulato, circa perforationem suber- 
cavato; apertura parum obliqua, late lunari ; perist. simplice, recto, 
marginibus distantibus, columellari declivi, superne dilatato, patente. 
Diam. maj. 123, min. 11, alt. 6 mill. 
Hab. St. Thomas (Bland), and Porto Rico, West Indies. 
12. Hevix susconoipea. H. testa angustissime perforata, de- 
pressa, tenut, fragili, superne distincte costulata, pellucida, cornea ; 
spira brevissime conoidea, vertice obtuso ; anfract. 5, convexius- 
culis, lente accrescentibus, ultimo non descendente, supra medium 
subangulato, basi modice convexo, distanter radiato-striolato ; 
apertura parum obliqua, lunari ; perist. simplice, recto, marginibus 
vie convergentibus, columellari leviter arcuato, ad perforationem 
vin reflexiusculo. 
Diam. maj. 103, min. 94, alt. 54 mill. 
Hab. Ceylon (Mr. Thwaites). 
13. Hextrx Newcomer. dH. testa angustissime perforata, de- 
pressa, tenui, confertissime rugoso-striata, vix sericea, pellucida, 
cornea ; spira brevissime conoidea, acutiuscula; sutura impressa, 
subcrenata ; anfract. 33, convexiusculis, rapide accrescentibus, 
ultimo non descendente, peripheria obsolete angulato, basi convexo ; 
apertura diagonali, lunato-subcirculari, intus margaritacea ; perist. 
simplice, recto, marginibus approximatis, columellari perarcuato, 
superne vir reflexiusculo. 
Diam. maj. 11, min. 9, alt. 6 mill. 
Hab. Oahu, Sandwich Islands (Dr. Newcomb). 
14. Hexrx Puarri. UH. testa perforata, depressa, tenui, membra- 
naceo-costulata et longe pilosa, diaphana, cornea ; spira brevissime 
conoidea, acutiuscula ; anfract. 51, viz convewiusculis, sensim 
accrescentibus, ultimo non descendente, superne subplano, obsolete 
angulato, basi convexo ; apertura vix obliqua, late lunari; perist. 
simplice, recto; marginibus distantibus, basali levissime arcuato, 
columellari superne perdilatato, fornicatim reflexo. 
Diam. maj. 10, min. 9, alt. 6 mill. 
Hab. Natal, South Africa (Mr. Platt). 
