HYPOLYSIA. 37 



Perrieria canefriana SYKES, Journ. of Malac., 1904, xi, p. 

 91, pi. 9, f. 3, 4. 



"This interesting discovery extends the range of the genus, 

 hitherto known only from New Guinea. The present species 

 is by far the smallest of the three described and may be 

 separated from P. minor Smith by its darker color, more 

 tapermg form, and by the columella being more twisted. As 

 Mr. Pilsbry states (Man. Conch., ser. 2, vol. xvi, p. 189) 'the 

 internal structure of the shell has not been investigated,' I 

 have broken up a specimen, which is now figured. The axis 

 is much twisted, and I am unable to trace any armature upon 

 it. I doubt if Perrieria belongs to the Megaspirida ; may it 

 not be really referable to the Acliatinida ? " (Sykes}. 



Genus HYPOLYSIA Melvill & Ponsonby. 



Ann. and Mag. N. H. (7), viii, p. 318 (Oct., 1901). 



"Shell slender, fusiform, tapering, as in Subulina, but 

 thickened throughout close to the suture." Aperture ovate 

 as in Opeas, the outer lip projecting as a rounded lobe far 

 forward, deeply retracted to the suture. Columellar margin 

 reflexed above. Type H. ftorentice (pi. 10, f. 66, 67). 



Distribution, Natal. From the figure the axis seems to be 

 perforate or rimate, but nothing is said about it in the text. 

 The columella is said to be truncate at base, but the trunca- 

 tion must be inconspicuous and oblique, since it is scarcely 

 indicated in the figures. The group is apparently near Opeas, 

 but distinct by the forwardly projecting lip, excised at the 

 suture. This is an exaggerated form of the structure seen in 

 Curvella, and weakly shown in Opeas itself. 



H. FLORENTLE Melvill & Ponsonby. PI. 10, figs. 66, 67. 



Shell elegantly tapering, thin, delicate, crystalline white. 

 Whorls 9 to 10, of which the apical two are mamillate, obtuse, 

 the rest thickened near the suture, tumid, under a lens longi- 

 tudinally oblique-striate ; last whorl exceeding in length the 

 preceding four. Aperture small, oblong; peristome thin, 

 evolute above ; columella straight, truncate towards the base. 

 Length 11.5, diam. 2.5 mm. (M. & P.). 



