114 Annals of the South African Mnseum. 



Mabinula maindeoni, Yelain. 



1877 Marinula maindroni, V^lain, Arch. Zool. Exper. vi. p. 126. 



P]. IV, f. 26. D.F. 

 1901 „ „ „ Kob., Conch. Cab. p. 284. PL 



XXXIII, f. 24. D.F. 



I have been unable to discover the whereabouts of the Type or a 

 single example of this species. Velain's diagnosis runs : — "Shell 

 thin, short and globular, semitransparent, coloured bright brown ; 

 surface smooth and shining. Spire small, very acuminate, almost 

 completely concealed by the last whorl, which is rounded and 

 greatly developed. Aperture large, swollen towards the base ; 

 columellar margin not thickened, marked with much sharper folds 

 than in the preceding species; outer margin thin and sharp, not 

 sinuous. The shell measures 4x3j mm." 



Animal unknown. 



Hab. Amsterdam Island. " Dans les vacuoles des laves, assez 

 rare." 



I cannot help suspecting that the description might possibly refer 

 to the young of the preceding species, but if such were the case 

 V61ain would hardly have separated them, and it is only just to 

 accept his verdict. 



Mabinula pabva (Swainson). 



1855 Cremnobates parva, Swains., Pap. & Proc. Pvoy. Soc. V.D. Land, 



iii. 1. p. 44. PI. YII, f. 3. D.F. 

 1901 02]hicardeh{s parvus, Swains., Tate & May, Proc. Linn. Soc. 



N.S.W. xxvi. p. 420. L. 

 1910 Cremnobates parva, Swains., Hedley & Suter, Proc. Mal. Soc. 



ix. pp. 151, 152. D.F.A.B. 

 1913 „ „ ,, Suter, Man. N.Z. Moll. p. 594. 



DA.R. 

 Shell small, imperforate, prolonged ovate-acuminate, rather thin, 

 brown, corneous. Spire moderately produced, about one-third the 

 length of the aperture ; apex acute. Whorls 4, rather convex, very 

 rapidly increasing, showing no sculpture except faintest irregular 

 growth-maiks. Suture fairly deep. Aperture ovate, peristome 

 whitish, outer lip simple, acute, making almost a right angle, and 

 thus appearing perceptibly swollen, at its junction with the paries. 

 Columella white, thickened, with two dental processes ;■ — the upper 

 sharp and prominent, jutting out at right angles, equidistant between 

 the apex of the apeiture and the second tooth, which is shorter and 



