xl CONTENTS OF VOL. II. 
Page. 
A. Aperture of the shell entire. 
. Aperture of the shell closed by a lid. Turbonide. 
Neritade. Trochusidz. ; 488 
—_ 
2. Aperture of the sheil exposed. Finn, Velutina. 489 
B. Anterior margin of the aperture of the shell canali- 
culated. 
1. Shell convoluted. Cypreade. Ovulade. Volu- 
tade, : 490 
2. Shell turreted. Buceinide. Manas Conishtndee 
Strombuside. 3 ; s 491 
Tribe IT. 
Shell internal. Sigaretus. ; s ib. 
Subdivision IT. 
Heart traversed by the rectum. 
Tribe I. Shell ear-shaped. 
Haliotidz, Haliotis, Padola, Stomatia. : 4.92 
Tribe II. Shell conical. 
Crepidulade. Capuluside. Fissurelladz. ; 4.04 
Division I1.—Mollusca Acephala. 
Section I.—AcEPHALA CONCHIFERA. 
Order I. Bracwioropa. 
Subdivision I. 
Shell supported on a fleshy peduncle. 
Lingula. ‘Terebratula. : Z 4 4.96 
Subdivision IT. 
Shell sessile. Criopus. , 3 : 499 
Order II. Bivatvia. 
Description. Ligament. Muscles. Syphons. Byssus. 
Foot. Crystalline process. Pearl, : - 499 
