156 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
L. fragilis Lam. 
L. inflata Lam. 
L. glacialis Lam. 
L. pellucida Adams. 
Plicatula Lamarck 1801. 
181. PI. cristata Lam. Woodward, pi. xvi., f. 17. 
Ostrea spondyloidea Meuschen. 
Spondylus plicatus Chemn. 
PI. reniformis Lamarck. 
(, Sub-order Ostreina.) 
Ostrea Linne. 
182. O. frons Linn. Wood, Ind. Test. Mytilus, 3. 
0. parasitica Gmel. (part). Wood, Ind. Test., 
pi. xi., f. 71. 
0. radicum Chemn. 
0. arborea Chemn. 
0. rubella Lam. 
0. limacella Lam. Chenu, Man., vol. ii., f. 1005. 
0. erucella Lam. 
0. folium Reeve (not Linn.). 
0. rhizophorae Guilding. 
Order Arc ace a. 
Leda Schumacher 1817. 
183. L. jamaicensis Orb. (var.) Chenu, vol. ii., 
f. 901-903. 
Arc a Linne. 
184. A. umbonata Lam. Wood, Ind. Test. Area, 14. 
A. ventricosa Lam. 
A. mutabilis Reeve. 
