KOSTELLAEIA. 475 



As to the anatomy, we need only observe, that the oeso- 

 phagus is very long and circled behind the proboscidal mass 

 by a cordon of four round yellow ganglia, three above, one 

 beneath. The liver is dark greenish-brown and very granular ; 

 the other organs, as the matrix, ovary, testis, viscous sac, 

 anus, &c., offer no peculiarity. The organe generateur is long, 

 yellow, strap-shaped, annulate for part of the basal portion, 

 curving above to a point : it is not placed posteriorly, as some 

 authors say, but under and anterior to the right tentaculum. 

 We have omitted to state, that there is only one branchial 

 plume, long, narrow, whitish-yellow, with about forty very 

 short pectinations : above the plume there is a glandular sub- 

 stance resembling the mucous fillets of the Canalifera ; or it 

 may be a second rudimentary plume ; but in either case it 

 denotes the Muricidal alliance. Notwithstanding the anoma- 

 lies of this animal, its natural position is immediately before 

 the proboscidal groups. We think that the Aporrhais pes car- 

 bonis, lately introduced to the British list, is probably a deli- 

 cate dwarf variety of the present species. It is from Zetland. 



R. PES CARBONIS, Brongniart. 



Aporrhais pes carbonis, Brit. Moll. iii. p. 186, pi. 89. f. 5, 6. 

 Rostellaria pes pelecani, var., Kiener. 



I here present malacological notes on the British Muricida, 

 which are now distributed into Murex, Buccinum, Ftisus, Pleu- 

 rotoma, Purpura, Nassa, Trichotropis, and Cerithiopsis these 

 genera form a part of Lamarck's Canalifera and Purpurifera. 

 This family is of enormous extent, and has its origin in the 

 Linnsean genera Murex and Buccinum, which, though sepa- 

 rated by Linnaeus on artificial grounds, have their animals 

 identical in all essential points ; and it can scarcely be doubted, 

 with the views held by that great naturalist, that if he had 

 been aware of their similar malacological structure, he would 

 have merged the Buccina in Murex, or vice versa. We shall 

 therefore consider them synonymous ; they have been split by 

 the moderns into numerous genera on purely conchological 



