54 HENRY CLIFDEN BURNUP. 



Ennea sylvia Melv. & Pons. PI. Ill, figs. 18, 19, 20. 



Ennea sylvia Melv. & Pons., Ann. and Mag. Nat. Hist., vol. xii (1903). 

 p. 599, pi. xxxi, fig. 4; Connolly, Ann. S. Af. Mus., vol. xi (1912), 

 p. 86. 



Another species, hereafter described as E. melvilli, from 

 Natal, having been mistaken for, and distributed as, E. sylvia 

 M. & P., it has become necessary to examine critically the 

 characters, description, and figure of the older shell before 

 describing the new, and to re-figure the former with a magni- 

 fication corresponding to that chosen for the figures of the 

 latter, in order to make comparison easier. For this purpose 

 I have been able to examine the four co-types in Mr. 

 Ponsonby's collection and three shells from the original lot, 

 presented to me by Mr. Farquhar ; and from the latter I have 

 chosen my type for the new figure, the co-types being unsuited 

 to the purpose in that one has a broken peristome, one is 

 holed, one is abnormally large, and the fourth has a slight 

 extraneous obstruction within the aperture which I failed to 

 remove. Though unsuitable for figuring, their characters are 

 quite sufficiently revealed to leave no room for doubt that my 

 other three specimens belong to the same species. 



In the original description a contradiction occurs in that 

 the teeth and plaits are said to be four, while the details of 

 five are given. Five is the correct number, of which the 

 deep-seated internal columellar plait is more than mammae- 

 form, having a strong rib across it, obliquely from left to 

 riffht and downwards. The small basal " tooth " is a small 

 in-running plait, and that on the columellar lip appears like a 

 triangular swelling, but is well excavated from behind. From 

 the rima a very narrow perforation rises up the axis Avith a 

 wider branch into the deep-seated columellar plait. Besides 

 the processes of the aperture detailed in the original descrip- 

 tion there is a very inconspicuous thickening of the shell on 

 the base forming a slightly raised ridge, hardly amounting to 

 a plait, parallel to the basal lip and behind the basal and 

 labral processes. A slight corrugation indicates its position 



