PART II. 



A NATURAL ARRANGEMENT 



OF THE UNIVALVE AND BIVALVE SHELL-FISH, COMPOSING 

 THE ORDERS 



GASTEROPODA AND DITHYRA 



OP THE CLASS 



TESTACEA. 



Chief Abbreviations. 



Bligh Cat. Catalogue of the Bligh Mart, or Mar. Martini. 



Shells. Sow. Gen. or S. Gen. Sowerby's 



Chem. or Ch. Chemnitz. Genera of Shells. 



Ency. Meth. or En. M. Encyclo- Sow. Man. Sowerby's Manual of 



pedie Methodique. Conchology. 



Lam. System of Invertebrated ani- Tank. C. Tankerville Catalogue. 



mals ; the No. refers to his series Zool. 111. i. & ii. Zoological fllus- 



of species in the original edition. trations, First and Second Series. 



ORDER GASTEROPODA. 

 TRIBE ZOOPHAGA. Carnivorous Gastropods. 



FAMILY 1. MURICID^E. Murexes and Whelks. 



Pillar never plaited ; shell spiral, the base narrowed, 

 and either truncate or slightly produced. 



SUB-FAM. 1. MURICINJE. Murexes. 



Spire as long as the aperture ; exterior rough ; the 

 whorls marked with varices ; aperture wide. 



MUREX Lin. Varices from three to five on each whorl ; 

 u 4 



