ON. SOUTH AFRICAN ENNE^. (D 



E line a montana Meli:. & Pons. PI. \, figs. 60, 61, 62, 63, 



64, 65, m. 



Ennea montana Melv. S: Pons.. Ann. and Mag. Nat. Hist., vol. xii 



(1903), p. 599, pi. xxxi, fig. 15. 

 Ennea parallela Melv. &: Pons.. il)id.. vol. iv (1909j, p. 4S9. pi. viii. 



fig. 9. 



On first studying- this species the material at my command 

 was small, and showed so much variation, especially between 

 my own two shells, ex coll. Farquhar, reputed to represent 

 respectively montana and parallela (figs. 61, 62, 63, and 

 fig. 60), but also between these two shells and two of the 

 co-types of parallela lent to me by Mr. Ponsonby (figs. 65 

 and 66), and between those two co-types inter se, that I Avas 

 not only prepared to admit the validity of the two species, 

 but was endeavouring to define the limitations of intermediate 

 forms. As, however, neither of my shells and none of Mr. 

 Ponsonby^s co-types of parallela seemed to agree accurately 

 with Melvill and Ponsonby 's descriptions and figures, a com- 

 parison with the types in the British Museum became essential. 

 Mr. Edgar A. Smith most kindly undertook the investigation, 

 and, being supplied by me with certain shells and drawings, 

 has furnished the following report : 



" Fig. 65 represents the true parallela. Of the shells, that 

 figured as 65 and the one unfigured agree with M. & P.^s type. 

 1 do not regard the third example (fig. 66) as a distinct species. 

 In my opinion it is an older shell with more developed teeth 

 and a slightly modified labrum. The shell figured as 60 I 

 also consider as parallela with well-developed lip and teeth ; 

 the labral tooth is strong, and does not show the tendency to 

 be double, as in other specimens. 



"I have compared the types of parallela and montana, 

 and cannot regard them as distinct. The latter is an old 

 shell with lip and teeth more thickened. Your figure (re- 

 drawn as fig. 61) shows a minute columellar tooth which does 

 not exist in the type." 



Mr. Smith does not comment upon the presence, in the shell 



