74 HELIX-PARTHENA. 



gins parallel, the latter expanded toward the umbilical region and 

 adnate over it ; parietal wall covered by a translucent callus. 



Alt. 50 diam. maj. 68, min. 55 mill. ; alt. 45, diam. maj. 70, min, 

 56 mill. ; alt. 32, diam. 48 mill. 



Hayti. 



H. cornumilitare FER., Hist 1. 15, f. 5-7. H. cornumilitare "Linn." 

 of Pfeiffer and authors, not of Linne. H. gigantea LAM., An. s. 

 Vert, vi, p. 65 (1819) and other authors. 



The large size and deep color of this species will separate it from 

 other Helices of San Domingo. 



The H. cornumilitare of Linnaeus is a Caracolus, probably either 

 H. excellens or H. angistoma. Strict adherence to the principles of 

 nomenclature would compel us to call this species H. gigantea; but 

 I have preferred the better-known name. 



VAR. AUDEBARDI Pfeiffer. PI. 6, fig. 59. 



Iinperfbrate, globose-conoidal, rather solid ; similar to H. cornu- 

 militare in sculpture, whorls and coloration, but smaller, lighter 

 colored, never so dark behind the aperture. The spire is more 

 elevated than H. cornumilitare ; the peristome is narrower, and the 

 aperture not so wide. The microscopic granulation is more effaced 

 than on most specimens of the former species. 



Alt. 37-40, diam. maj. 47, min. 37-38 mill. 



Hayti* 



H. audebardi PFR. P. Z. S. 1851, p. 147. KEEVE, Conch. Icon., L 

 111. (1851) PFR. in Conchyl. Cab., t. 131, f. 20, 21 ; and Monogr. 

 iii, p. 186. 



The more elevated form and lighter coloration are the principal 

 characters separating this form from H. cornumilitare. Pfeiffer 

 mentions a " var ,?, major, perist. latiore ; diam maj. 70, min. 58, 

 alt. 45 mill." which must be identical with, or very near to cornu- 

 militare. 



H. LUQUILLENSIS Shuttleworth. PI. 7, figs. 63, 64. 



Imperforate, conoidal, elevated, solid, opaque, lusterless, chocolate- 

 colored, or sometimes chestnut ; surface apparently smooth save for 

 oblique incremental wrinkles, but under a strong lens seen to be 

 covered all over with an excessively minute, dense, and beautifully 

 regular granulation ; spire conical, elevated, obtuse and whitish at 

 apex ; sutures at first linear, becoming impressed ; whorls 5, the 

 first 3 scarcely convex, the following convex, sometimes swollen just 



