SCABKICOLA. 131 



This may possibly be an older individual of M. Strangei, 

 Angas ; if so, its name should have preference on account of 

 priority of publication. 



M. NoRRisii, Reeve. PI. 40, fig. 1G6. 



White, under a black, thin, horny epidermis ; surface very 



finely decussated. Lenoth, .3"4 inches. 



Habitat unknown. 



Described from a unique specimen, thirty -five years ago ; no 



others have been recorded. 



M. NiVEA, Swainson, PI. 40, fig. IGT. 



White, with obsolete, rather distant, orange-brown revolving 

 lines, and a few scattered brown spots next to suture ; encircled 

 with very fine, punctured, impressed striae. Length, 2*75 inches. 



Isl. Annaa, on the reefs. 



M. Isabella, Swainson. PI. 40, figs. 168, 169; PI. 39, figs. 15.9, 

 162. 

 Yellowish white, clouded and sometimes indistinctl}^ banded 

 with orange-brown ; closely spirally ribbed, more or less clath- 



rate by fine longitudinal lines. Length, 2"5-3*5 inches. 



China. 



Aperture small and narrow, shell contracted to a canal below. 

 M. Morchii, A. Ad. (fig. 169), is founded on an individual in 

 which the spiral sculpture is more, and the longitudinal less 

 pi'ominent than in the usual form. 31. Herklotsiana^ Dohrn, an 

 unfigured species from Japan, is said to have the longitudinal 

 sculpture more prominent than M. Isabella, crossing the spiral 

 ribs and cutting them into granules : it is probably not distinct. 

 Perhaps this is like M. loricata, Reeve (fig. 162), described without 

 localit}-, and which is very plainly a variety of M. Isabella. I 

 find no distinctive characters in M. Peasei, Dohrn (fig. 159), 

 described as from Australia, and said by Sowerb}^ to come from 

 Sandwich Islands. 



M. Hebes, Reeve. PI. 39, fig. 161. 



Whitish or yellowish, slightly shouldered. 



Length, l-25-l*5 inches. 



Habitat unknown. 

 18 



