GASTEROPODA. 



219 



(Fig. 16), rachidian teeth, singlej transverse, dentated in front ; 

 uncini single. Carnivorous. 



BucciNUM, L. Whelk. 



Etymology, luccina, a trumpet, or triton's-shell. 



Type, B. undatum. PL Y., Fig. 10. 



Shell few "whorled ; whorls ventricosc ; apertui'e large ; canal 

 very short, reflected ; operculum lamellar, nucleus external. 

 (See Pisania.) 



Distrihution, 48 species. Northern and Antarctic seas. Low 

 water to 100 fathoms. (Forbes.) (B. ? clathratum, 136 fathoms, 

 off Cape). South Australia. 



Fossil, 130 si3ecies, including Pi6a?zia,&c. Gault? — Miocene — 

 Britain, France. 



Fig. 83. Nidamental capsules of the Wlielk.* 



The whelk is di*edged for the market, or used as bait by 

 fishermen ; it may be taken in baskets, baited with dead fish. 

 Its nidamental capsules are aggregated in roundish masses, 

 which when thrown ashore, and diifted by the wind resemble 

 corallines. Each capsule contains five or six young, which, 

 when hatched, are like Fig. 83, h: a represents the inner side 

 of a single capsule, showing the round hole from which the fry 

 have escaped. 



Sub-genus, Cominella, Gray. Ex. B. limbosum, purpura 

 maculosa, &c. Operculum as in fusus. About 12 species. 



PSEUDOLIVA, Swainson. 



Etymology, named from its resemblance to oliva, in form. 

 Synonyms, Sulco-buccinum, D'Orbigny. Gastridium (Gray; 

 G. Sowerby. 



* Fig. 83. From a small specimen, on an oyster-shell, in the cabinet of Albany Ilan 

 cock, Esq;. Tlie line at b represents the length of the young shell. 



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