EXPLANATION OF THE PLATES. 500 
PLATE XVI. 
Ostreide. 
Page 
1, Ostrea diluviana, Gmelin. 4. Chalk-marl, Brit. .......... 407 
2 (Exogyra) conica, Sby. |Z. U. Greensand, Wilts .. 408 
3. Anomia Achzus, Gray. %. Kurachee, Scinde ............ 408 
4, Placunomia macroschisma, Desh. 4. California .......... 409 
5. Placuna sella, Gm. sp. 4. China,..... atavaioveitapetata ete hainues 409 
6 placenta, Is, (young). Nv Australia: .......22.-.. 410 
7. Carolia placunoides, Cantr. (hinge). Tertiary, Egypt... .. 410 
Pepeeewetiopica, Ne 20 China: 7... us fees o's oes ees 6 p Larch ieee 412 
9 (Hemi-pecten) Forbesianus, Ad. 2. Sooloo Sea, 14 fms, 412 
10. eeiinnrces)) Pusio, “PEN. «2... BEIL. yas liar yates 412 
Beetimacguamosa, Lam. 4. CHINA .......000..0++s +000 ten 412 
12, —— (Plagiostoma) cardiiformis, Sby. Bath Oolite, Brit. .... 212 
13. ——-. (Limatula) sub-auriculata, Mont. Brit. .............. 413 
14. —— (Limea) strigilata, Brocchi, sp. Pliocene, Italy ...... 418 
15. Spondylus princeps, Gmel. 4. Sooloo Sea............c0ee 413 
16. (Pedum) spondyloides, Gmel. 2. Red Sea...... 414 
7; Plicatula cristata, Lam. %. W..Indies ...........2.. 0005 414 
Aviculide. 
emeevterinmirindo, In, F. Medit.~ .. 0. 6.202 oeence cee woes 415 
Lo: (Meleagrina) margaritifera, L. sp. +. Ceylon...... 416 
20) ———_ (Malleus) vulgaris, Lam. 2. China .............. 416 
21. (Vulsella) lingulata, Lam. 4. Red Sea............ 416 
22. Posidonomya Becheri, Bronn. Carb. Hesse, Brit........... 417 
23. Pinna squamosa, Lam. 1. Medit........... 0... eevee ees 419 
24, Crenatula viridis, Lam. 4. Chinese Seas ..........+00006 418 
a,@ adductor impressions. 
p, pedal muscles. 
g, suspensors of the gills. 
b, byssal foramen or notch. 
