264 CARACOLUS. 



Alt. 12, greater diam. 19*, leaser 16 mill. 



Sierra Nevada de S. Marta, New Granada. 



Helix sieversi MARTENS, Conchol. Mittheil. iii, p. 7, t. 41, f. 5, 6, 

 (1889.) 



The single specimen before me is much bleached, and shows only 

 that no strong color-markings were present. The color of fresh 

 examples is evidently dark violet-brown. It differs from H. isodon, 

 which also lives in New Granada, in having the umbilicus closed all 

 but a minute crack, by the thick deposit from the peristome, in the 

 two pretty equal teeth of the basal margin, and the convex, not car- 

 inated body-whorl. (Mts.) 



C. UNCIGERA Petit, var. CREVEAUXIANA Ancey. 



Shell always larger than uncigera (alt. 13, greater diam. 38, lesser 

 35 mill.), unicolored chestnut, the aperture much more solute; 

 parietal fold hardly straight, but contorted ; basal hook narrow, 

 strong ; peristome white, etc. (Anc., Bull. Soc. Mai. Fr. viii, p. 152.) 



Frontino, Western Columbia. 



This is considered a distinct species by Ancey. The specimen 

 before me measures 34 mill. diam. This is the variety described in 

 Vol. V, p. 165, and figured by Dohrn in the Conchyl. Cab., pi. 181, 

 figs. 10, 11, 12. 



The following are scarcely more than individual mutations : 

 conoidea Anc., Like typical uncigera, but spire more elevated, con- 

 oidal. Anopla Anc., Basal fold obtuse, not hooked, otherwise like 

 the type. 



Section THELIDOMUS Swains. 

 Page 65, line 15, for "periphery" substitute peristome. 



Section PARTHENA Alb. 



Page 73. The name " H. cornumilitare " should be dropped, and 

 H. gigantea substituted. Crosse holds that H. audebardi is a dis- 

 tinct species from gigantea. 



Section CEPOLIS Montf. 



Page 95. H. pimesoma is a synonym of H. trizonaloides Brn. 

 The dimensions of the latter are erroneously stated in my text. 



