9 
WORMS. 
55 * 
56. 
57 
58. 
1^; 
61. 
62. 
63* 
64. 
6s- 
66 . 
67. 
68 . 
69. 
7 » 
7 *' 
72. 
73 * 
74 - 
75 - 
Pkhat. 
B. 
Ttllina. 
Cardtuntt 
Maitra, 
D»nax. 
Venus. 
Spendylus. 
Chama, 
Area. 
Oftrea. 
Anemia. 
Mytilus. 
Pinna. 
Shell bivalve : with accclTory valves at the 
hingt-'- 
Bivalves : fiell with 2 valves, Conchs, 
Hinge with generally a broad thick tooth, 
not let into the oppofne valve. 
Shell open at each end: hinge with a Angle 
or double fubulate relledled tooth, not let 
into the oppol'itc valve. 
Hinge with the lateral teeth of one valve not 
let into the other. 
Hinge with reino e penetrating lateral teeth. 
Hinge with a coitipHcated triangular middle 
toot*’, and an adjoining h.dlow. 
Hinge with a generally remote lateral tooth, 
not let into the oppolite valve. 
Hinge with generally 3 approximate divari- 
cate teeth. 
Hinge with 2 teeth feperateJ by a fmall 
hollow. 
, Hinge ill one flicll, with 2 oblique obtufe 
teeth. 
Hinge with numerous penetrating teeth. 
Hinge without teeth, but an ovate hollow. 
Hinge without teeth, but generally a linear 
deprelSon on the rim, the beak of one 
valve curved over the hinge. 
Hinge without teeth, with a fubulate de- 
preflion, and generally fixed by a filky 
beard. 
Hinge without teeth : valves united at one 
end and open at the other. 
C. Univalves, with a regular fpire. 
Argonaut a. 
Nautilus. 
Conus. 
Cypreea. 
Bulla. 
Valuta. 
Shell with one cell, fpiral involute. 
Shell with many cells, with a hole of coni' 
munication. 
Aperture cfFufe longitudinal, without te^. • 
Aperture effufe linear longitudinal, toothe 
each fide. , ^ 
Aperture a little contrafleJ and placed ob' 
iiquely. 
Aperture etfufe ; the pillar plaited. 
76 . BuccinetO’ 
