the South' African Stenogyrina3. 257 



stome thin, simple. Outer lip hardly curved outwards (and 

 doubtless would be slightly arched forwards in profile, but 

 the present specimen is imperfect). Columella very slightly 

 concave, margin triangularly reflexed over the rima. 



Shell 15-6 x 42, aperture 4 # 6x 1'75, last whorl 7*0 mm. 



Hab. Natal ( Wahlberg) . 



The shell contains eggs. It agrees in form with Krauss's 

 figure, and there is no reason to regard it as other than 

 typical of E. turriformis. Much confusion has arisen with 

 regard to this species, from the fact that it was described 

 from shells which, though almost perhaps themselves mature, 

 had hardly grown to half the proportions which the species is 

 capable of attaining ; Wahlberg's specimens, too, were of a 

 more slender contour than generally occurs — facts which, 

 combined with the use of the word " nitido " in the original 

 description, have caused other forms to pass as typical of 

 Krauss's species. 



Now it appears obviously necessary to accept the Stockholm 

 cotype as the basis on which to reconstruct the perplexing 

 Natal Euonymce ; and, after allowing a margin for it to attain 

 full proportions, remembering that it is a slender form of a 

 species particularly subject to dimorphism, and taking into 

 careful consideration its colour, form, texture, and sculpture, 

 it seems that the two following, hitherto considered distinct 

 species, should be regarded as at most varieties of turriformis. 



Var. acus (Morelet). (PI. VI. fig. 2.) 



1889. Stenogyra acus, Morelet, Journ. de Conch, xxxvii. p. 8, pi. i. fig. 6. 

 1896. Subulina glaucocyanea, Melv. & Pons. Ann. & Mag. Nat. Hist. 



xviii. p. 317, pi. xvi. fig. 5. 

 1898. Subulina acus and S. glaucocyanea, M. & P. Proc. Mai. Soc. iii. 



p. 179. 

 1898. Opeas acus and 0. glaucocyaneum, Stur. Siidafr. Moll. p. GO. 

 1906. Euvnyma acus and glaucocyanea, Pilsbry, Man. of Conch, xviii. 



pp. 40 & 43, pi. x. figs. 70, 76. 



Hab. Port Elizabeth. 



A stouter form than the type, often containing 13 whorls 

 and measuring up to 28 mm. in length. 



The type of acus in the British Museum and the only two 

 cotypes that I have seen are dead and bleached ; but good 

 specimens, agreeing with them in other respects, vary in 

 colour from bluish to yellowish olivaceous, and are somewhat 

 dull, with often little striation on the upper whorls. Although 

 apically of the same thickness, they increase into a stouter 

 form than Krauss's figure, but in colour, sculpture, silky gloss, 



