Occasional Papers of the Museum of Zoology 35 



Helicina {Tristramia) zephyrina elatior "von Martens" 

 Crosse and Fischer (1893).^ — Eleven specimens from trees in 

 the lowland forests (H, I, b) and the savannah forests (H, 

 III, b) ; from the ground in the savannah forests (H, III, a), 

 and from the burnt areas (H, II, b). This is a rather well- 

 marked race of H. zephyriyia, although it occurs with the 

 typical form. In shape it is practically identical with the more 

 northern H. chrysocheila Binney (1851), but the latter usu- 

 ally (not always) differs markedly in color and appears quite 

 distinct. At least at present, it appears best to retain elatior 

 as a race of zephyrina, which occurs with the typical form, and 

 simply approaches, in shape, the other species. Specimens 

 measure : 



Altitude Greatest diameter Height aperture Diameter aperture 



1 2. 1 mm. 103 (12.5mm.) 49 (5.9mm.) S3 (7.0mm.) 



11.2mm. 94 (10.5mm.) 47(s.3mm.) 55 (6.2mm.) 



io.6mm. ioo(io.6mm.) 52 (5.5mm.) 57 (6.0mm.) 



Helicina (Tenuis) tenuis Pfeiflfer (184^9). 



H. lindenl Pfeiflfer (1849). 



H. vernalis Morelet (1849). 

 Fifty-eight adults ; from leaves of trees, vines and shrubs 

 in lowland jungle (H, I, b) and on ground (H, III, a) and 

 on leaves of shrubs and cacti (H, III, b) in the savannah for- 

 ests. The specimens vary somewhat in size ; extremes measure : 



1 "Elatior" as used by von Martens (1890) is a one-word descrip- 

 tion and not a name. This is the reason why he puts H. berendti Pfr. 

 as if it were a synonym under another of his short descriptions, "exca- 

 vatoangulata." When he actually wished to denote or name a sub- 

 species, he placed the name in italics and followed it by the name of 

 the author or the letter "n." Crosse and Fischer (1893) have since 

 changed some of these descriptions into true names, as, for instance, 

 in the present case. 



