CKHION, (;iu>i;i> v. 21 1 



among prickly pears. Subsequently it was reported tVoin Turk's 

 Island and Great Inagua (see Bland, Ann. Lye. Nat. Hist., N. Y., 

 XI, p. So), but specimens from these localities, labeled by Bland, 

 prove to be totally distinct species, having little save the purplish- 

 brown color of the mouth, in common with the true Pupa iostoma of 

 Pfeiffer's first description. 

 Var. arangoi Pilsbry and Vanatta. PI. 28, figs. 45, 46. 



Shell similar to the type in form, but smaller. Later two whorls 

 only of equal diameter, those above forming a rather long cone. 

 Whorls 8^ to 9. Surface closely and regularly ribbed throughout 

 (excep^ the smooth nepionic whorls), the ribs 31 to 36 in number on 

 the penultimate whorl, mainly white, interstices purplish-brown, mot- 

 tled with white. Sutures without noticeably exserted margination. 

 Aperture deep, rich purple within, the parietal lamella small and 

 short, as in typical iostomum. 



Length 23^, diam. 10; alt. of aperture 9 mill. (36 riblets). 



Length 18, diam. 9; alt. of aperture 8 mill. (31 riblets). 



Length 24, diam. 10|; alt. of aperture 9| mill. 



Cienfuegos, on the S. coast of prov. Santa Clara, Cuba (R. Ar- 

 ango). 



Strikingly different from iostomum at first sight, but we believe it 

 to be closely allied and probably a subspecies thereof. It was prob- 

 ably this form which Sr. Cisneros found in abundance at Cayo Car- 

 enus, near Cienfuegos, as quoted by Arango. The locality " Carde- 

 nas " for iostomum, also given by Arango, is probably erroneous. 



C. HYPEKLISSUM Pilsbry and Vanatta. PL 28, fig. 43. 



Shell moderately strong, much elongated, cylindrical, the later 

 four whorls of about equal diameter, those earlier gradually taper- 

 ing, forming an obtuse conn with slightly convex outlines. Pinkish- 

 brown (with more or less white maculation), the riblets white. 

 Whorls 11^, weakly convex, those of the cone smooth, the rest sculp- 

 tured with rather fine riblets narrower than the intervals, about 36 

 in number on each of the several later \yhorls. Umbilicus a short 

 rimation, compressed. Aperture ovate, decidedly higher than wide, 

 the throat flesh-tinted. Peristome white, well reflexed and revolute, 

 thickened ; parietal callus light, its edge hardly thickened ; parietal 

 fold median, very long, one-fourth to one-third of a whorl in length. 



Length 32^, diam. 10 ; alt. of aperture 12 mill. 



