63 



occurring at a different part of its surface, from that of the 

 former. The spire also is more obscure, of less propor- 

 tionate diameter, and with fewer revolutions. The canal is 

 shorter and less deflected : tl^e replication covering a greater 

 portion of the columella. It is subject to similar variety in 

 the tubercles of the outer lip ; but they are fully formed 

 only in advanced age. The colour is usually much brighter 

 than that of P. L ; but it is sometimes banded, as in that 

 species. Although from injury received in growth, spe- 

 cimens of P. Lapillus may be sometimes found, which 

 approach somewhat nearly to the other, yet in well formed 

 specimens the differences are so great as to leave little room 

 for doubt of their being distinct. I have seen three spe- 

 cimens of this animal, with the extremity of their shells 

 inserted under that of a common Limpet, and feeding on its 

 flesb. 



BUCCINUM. 



GENERIC CHARACTER: The shell oval or ovate, 



conical. Aperture longitudinal, with a notch at the base; 



but no canal. Columella not flattened, turgid at the upper 



part. 



Lamarck had separated into a distinct genus, under the 

 name of Nassa, those which have a callous columella; but 

 he has since reunited them to the Buccina. 



* B. UNDATUM, and B. STRIATUM. Turt. Lin. Pen. 



Brit. Zo., vol. 4, pi. 73, and pi. 74. Stew. Elem., vol. 2, 

 p. 401. B. U. Mont. Test. Brit., vol. 1. p. 237. Flem. 

 Brit. An., p. 342. Common in moderately deep water, 

 and often taken up attached to fishermen's lines. It is 

 frequently devoured by the Scate, the animal with the 

 operculum attached being found in its stomach ; but it 

 seems that the shell is speedily rejected, and in this state 

 it affords an habitation for the Hermit Crab: the largest 

 specimens of which are commonly found in these shells. 

 A curious net work of membranous capsules, sometimes 

 as large as the clenched fist, found on the shore after 

 stormy weather, is the case in which the spawn of this 

 animal is produced. In their original state, they are 

 attached to stones or shells; and when washed on shore, 

 often contain the young shell, which differs much from the 

 adult shape. 



* B. RETICULATUM. Turt. Lin. Pen. Brit. Zo., vol. 4, 



pi. 72, fig. 88, and 02. Mont. Test. Brit., vol. 1, p. 240. 

 Stew. Elem., vol. 2, p. 401. Nasa R. Flem. Brit. An., 

 p. 340. Common, between the tide marks. 

 B. LIXEATUM. Turt. Lin. Mont. Test. Brit. vol. 1, 

 p. 245. Flem. Brit. An., p. 344. Da Costa found it in 

 Cornwall. 



