236 CERION, GROUP VIII. 



PILS. & VAN., Proc. Acad. Nat. Sci., Phila., 1895, p. 207, with 

 var. valida; 1896, p. 321, pi. 11, f. 17, and var. valida, pi. 11, f. 18. 



This species has some resemblance to the Cuban G. infandum, 

 but differs in the dark mouth. O. calcareum is more obtuse above, 

 with pale aperture. O. sarcostomum of Little Inagua is an allied form 

 with smaller, pale aperture and much less dilated umbilical excavation. 

 Var. validum P. &. V. PL 34, figs. 8, 9, 10. 



Smaller and rather thin, ribbed throughout ; more or less copiously 

 maculate with dusky purple, or with the intervals of this color. 

 Aperture dark as in the type. Length 34, diam. 10-12 mill. 



C. REGIUM (Benson). PI. 35, figs. 17-24; pi. 47, fig. 40. 



Shell large, very deeply umbilicate, long-conic, subcylindrical, 

 solid, white, smooth, a little glossy ; obliquely and remotely and ob- 

 soletely plicate-striate. Spire noticeably tapering above, the apex 

 rather obtuse; umbilicus perforating. Whorls 11, somewhat flat- 

 tened, the last ascending in front, more strongly plicate, compressed 

 at the base ; suture linear, irregularly crenate. Aperture obliquely 

 truncate-ovate, sublateral, sloping away from the axis, fulvous 

 within ; columellar fold deep within, doubled ; parietal fold elongate, 

 rather deeply placed ; peristome heavily thickened, reflexed, wide 

 below, the margins joined by a callus ; columellar margin expanded, 

 sinuate above, its outer edge forming an angle ; right margin arched 

 forward. Length 43, diam. (measured to edge of outer lip) 23 mill.; 

 aperture with peristome 18 mill, long, 13 wide (Benson'}. 



Bahamas : Castle Island^ at the southern extremity of the Crooked 

 Island Bank. 



Pupa mumia SOWERBY, The Genera of Shells, Pupa, f. 2 ; re- 

 printed in REEVE, Conchologia Systematica ii, pi. 170, f. 2. Pupa 

 regia BENSON, Ann. & Mag. Nat. Hist. (2), iv, p. 125 KUSTER, 

 Conchyl. Cab. p. 134, pi. 17, f. 13, 14 PFR., Monogr. iii, 538 

 Strophia regia MAYNARD, Contrib. to Sci. iii, p. 37, pi. 5, f. 8, pi. 7, 

 f. 5, 6. Cerion regium Bens., PILS. & VAN., Proc. A. N. S. Phila. 

 1896, p. 321. 



Helix (Cochlodonta) decumanus Fer., (nude name) Prodr., p. 59, 

 no. 462, according to his specimens, but not his '* var. a," which 

 alone is defined. Pupa decumana Fer., PFR., Monogr. iv, p. 655 ; 

 vi, 288. CROSSE, Journ. de Conchyl. 1868, p. 337. Strophia de- 

 cumana Fer., BINNEY, Ann. Lye. Nat. Hist, of N. Y., x, p. 384 



