32 



its own young by that eminent conch ologist, Mr. 

 Alder of Newcastle, who kindly sent me specimens. 

 Since then, I have taken the shell of all sizes, so as 

 to leave no doubt of the identity of the larger speci- 

 mens with the smaller. In the Magazine of Na- 

 tural History, (vol. ix. p. 191.) I erroneously de- 

 scribed the animal of this species as belonging to 

 Natica monilifera ; and, having been deceived by the 

 remarkable difference of colour (which is possibly ac- 

 cidental) stated that the animal had only one tentac- 

 ulum, though further researches have convinced me 

 I was mistaken. 

 3. Montagui. 



Natica rufa, Mont. — Natica rufa, Flem. (not 

 Lam.) — Natica helicina, Phill. 



Shell with five rounded whorls, divided by a very 

 deep suture, the first largest, and the spire promi- 

 nent ; purplish-brown, or brownish-white, with a 

 white band encircling the upper part of the whorls at 

 the suture ; umbilicus deep, and hollowed by a spiral 

 groove, which notches the slightly reflected white 

 pillar lip; inside deep orange. Operculum corne- 

 ous. Lon. y^Q ; lat. J. 



The animal is white, with a few obsolete brown 

 markings ; the mantle and edge of the foot are each 

 bordered by a thread-like brown line ; tentacula two, 

 triangularly lanceolate, arising from a sort of veil 

 above the head ; whilst the animal is walking, they 

 are reflected back on the shell, and appear to be of 

 no use. No appearance of eyes. 



In deep water on the north coast, but rare. 



