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CANCILLA. 139 



M. TATHN^, Jickeli. PL 40, fig. 178. 



Whitish or yellowish white. Length, 18-20 mill. 



Red Sea. 

 I do not know the species ; two specimens were collected. 



-M. SULCATA, Swainson. PI. 40, figs. 171, 177, 182-184. 



Brownish white or light brown, under a chestnut or chocolate 

 epidermis. Length, 1-3-25 inches. 



W. Coast of Central America. 



I unite under this, the oldest name, several species agreeing 

 with it in color and sculpture but varying somewhat in form and 

 considerably in size ; the}^ are all inhabitants of the same region. 

 The largest of these is M. gigantea, Swn. (fig. 177), then come 

 in order of size, M. Hindsii, Reeve (fig. 182), M. attenuata, Swn. 

 (fig. 184), M.funiculata, Reeve (fig. 183). 



M. LINEATA, Swains., PL 40, fig. 172. 



Whitish, longitudinal!}* stained with chestnut, ridges chestnut. 



Length, 1 inch. 



W. Coast of Central America. 



Stouter, with a more acute shoulder than the last species, and 

 differently colored ; yet I suspect that it is only a variety of it. 



M. BELCHERI, Hinds. PL 40, fig. 179. 



Whitish, under a dark chocolate epidermis ; sculpture con- 

 sisting of flat, broad ribs and narrow, deeply cut intervening 

 grooves. Length, 4-5 inches. 



W. Coast of Central America ; in mud, at 17 fathoms. Hinds. 



M. ^GRA, Reeve. PL 40, fig. 181. 



Whitish, clouded with yellowish brown; ridges smooth and 

 close, interstices punctured. Length, 1*7 inches. 



Habitat unknown. 

 M. PIA, Dohrn. PL 41, fig. 189 ; PL 40, fig. 173. 



Yellowish white. Length, 2'25 inches. 



Australia. 



The locality is somewhat doubtful. M. multilirata, A. Ad. 

 (fig. 173), said to be from the China Sea, may possibly be a 

 juvenile example of it. 



M. CARNICOLOR, Reeve. PL 40, fig. 185 ; PL 41, figs. 186, 187. 

 Whitish to yellowish brown, light pink or white within the 



