ON SOUTH AFRICAN ENNE^. 73 



shells, together Avith the unusual freedom from obstruction in 

 the aperture, warrant a comparison. 



The flatter Avhorls, shallower suture, much smoother and 

 more highly polished surface, rounder aperture, with more 

 widely expanded peristome, shorter parietal plait, and the 

 two teeth on the columellar lip (or one in var. mane a) should 

 always readily distinguish elliptica from the present species. 

 Elliptic a, too, shows a conspicuous opening fi'om the rima 

 to the axial perf oi'ation, while none is visible in i n h 1 u z an i e n - 

 sis. The swelling on the columellar lip of inhluzaniensis 

 cannot be looked upon as representing one or other of the 

 teeth on the columellar lip of elliptica, for its position does 

 not correspond with that of either. 



The dimensions of such specimens of inhluzaniensis as I 

 have measured in addition to the type, are as follows : 

 height X width, 3-59 x 1-52, 8-41 x 1-49, 3-85 x 1-49, 3-17 x 

 1-42, 2-84 x 1-42 mm. 



From the dimensions of the two specimens figured it would 

 appear that juxtidens, besides being larger than inhluza- 

 niensis, is also proportionately a wider shell, the ratio of 

 width to height of these specimens being respectively 45*25 

 and 40*84 per cent. ; and Melvill and Ponsonby's dimen- 

 sions of their type uphold the suggestion. The appear- 

 ance of my calcined co-types of juxtidens, which are too 

 brittle to admit of actual measurement, also seems to support 

 it ; but a larger series would be required before the fact could 

 be established, for my smallest example of inhluzaniensis, 

 manifestly a dwarfed shell, is, with a ratio of 50 per cent., 

 proportionately much wider than the figured juxtidens. 



Enn ea pr em nodes, Sturany. PI. V, fig. 56. 



Ennea premnodes Sinr., Ann. Hofnuis. Wien, xvi (1901). pub. 1902, 

 p. 69, fig. .5; Connolly, Ann. S. Af. Mus., vol. xi (1912), p. 84. 

 •• 1901 '■ [sic). 



Through the kindness of Dr. Sturany in giving me one of 

 his co-types, I am enabled to offer a description and figure of 



