THE NAUTILUS. 71 
Genus CEPOLIS Montfort, 1810. 
Section Hemitrochus Swainson, 1840. 
46. CEPOLIs vARIANS (Menke). Key West; Lower and Upper 
Matacumba Keys; Biscayne Bay. Also New Providence, Inagua, 
ete., Bahamas. 
Genus ACANTHINULA Beck, 1846. 
The systematic position of this genus and of Vallonia is unknown. 
Section Zodgenites Morse, 1864. 
47. ACANTHINULA HARPA (Say). Northern tier of States from 
Maine to Minnesota ; Canada ; Bering Island (Vega) ; also Sweden, 
Kamchatka, ete. 
Genus VALLONIA Risso, 1826. 
48. VALLONIA PULCHELLA (Mill.). Montana eastward, from 
Canada to, or nearly to, the Gulf of Mexico. Europe. 
49. VALLONIA EXCENTRICA Sterki. Quebec and Maine to Mary- 
land, west of Ohio; also Europe. 
50. VALLonrA cosTata (Mill.). Quebec to Washington, west 
to Colorado, Europe. 
50a. VALLONIA COSTATA MONTANA Sterki. Rocky Mts. 
51. VALLONIA ALBULA Sterki. Quebec, Manitoba, British 
Columbia. 
52. VALLONIA PARVULA Sterki. Illinois to Nebraska, south to 
Indian Territory (V. americana Ancey is the same). 
53. VALLONIA GRACILICOsTA Reinh. Mingusville, Mont.; Fort 
Berthold, Dakota. Praii= 
54. VALLONIA CYCLOPHORELLA Ancey. Washington to Montana, 
south to New Mexico. 
55. VALLONIA PERSPECTIVA Sterki. Northern Alabama and 
Tennesee to Iowa; Mingusville, Montana. 
Subfamily POLYGYRINZ (vel Protogona). 
Genus PRATICOLELLA vy. Martens, 1892. 
56. PRATICOLELLA BERLANDIERIANA (Moricand). Texas, 
Anderson and Bosque Counties southward : also Mexico. 
57. PRATICOLELLA GRISEOLA (Pfr.). Southern-central Texas; 
also and mainly Mexico, as far south as Vera Cruz. 
