192 ORTHALICUS. 



unexpanded, broadly bordered inside with a blackish-purple callus ; 

 the margins joined by a somewhat thick black-brown callus, strongly 

 thickened outside at the base of the columella. Alt. 90, diam. 52, 

 length of aperture 53, width 33 mill. (Shuttl) 



Tarapoto, Eastern Peru (Moricand). 



Orthalicus trullisatus SHUTTL., Notitiae Malacologicae i, p. 58 (ex- 

 clusive of synonymy), pi. 5, f. 1 (1856). 



Intermediate between 0. gallina- sultana and 0. dennisoni ; differing 

 from 0. dennisoni in the thinner, more inflated shell with more convex 

 whorls, the blackish-purple bands, and color of the aperture and 

 columella; from 0. gallina-sultana it differs in the more solid shell, 

 which is opaque and more slender, in the thickened black-brown col- 

 umella, and color of the aperture and peristome (Shuttl.). 



Subgenus METORTHALICUS Pilsbry, 1899. 



Porphyrobaphe, in part, of Shuttleworth and other authors. Bul- 

 inus, BRODERIP, Zoological Journal iv, p. 222 (1828), not of O. F. 

 Miiller, 1781. 



This new group includes species with pitted nepionic whorls as in 

 typical Orthalicus, but differing in the solidity of the shell and its 

 thick, blunt or reflexed lip. 



GROUP OF O. FRASERI. 



The species placed here are related to typical Orthalicus in colora- 

 tion and sculpture, differing in the less ventricose form, and devel- 

 oped peristome. 0. galactostoma and 0. augusti are stated to have 

 smooth apical whorls ; and if this proves to be true, they must be re- 

 moved to Porphyrobaphe. 



Key to species. 



a. Columella with a rather strong fold above ; aperture more than 

 half the length of the shell ; having bands of blackish spots or 

 streaks. 



b. Aperture purplish-fleshy within. fraseri, p. 193. 



b 1 . Aperture and peristome milk-white, columella making an 



angle with the basal lip. galactostoma, p. 194. 



a 1 . Columella not folded above, but twisted below ; aperture less 



than half the length of shell, of a deep livid rose color, the lip 



whitish ; shell very long, alt. 93, diam. 36, aperture 37 mill. 



buckleyi, p. 193. 



