x1y CONTENTS. 
Fam. IV. Arcade.—Arca, Cucullea, Pectunculus, Timepaaie 
Nucula, Isoarca, Leda, Solenella, Solemya.............. 424 
Fam. V. Trigoniade.—Trigonia, Myophoria, Axinus, Cur- 
tonotus, Pseudaxinus, Lyrodesma ...........:...+.0002 Seen 430 
Fam. VI. Unionide.—Unio, Castalia, Anodon, Iridina, 
Mycetopus, Aitheria, Mulleria. ............s20 = eee 432 
Section B. Sreponipa: Integro-pallialia ............ 000000 436 
Fam. VII, Chamide.—Chama, Diceras, Requienia ........ 437 
Fam. VIII. Aippuritide.—Hippurites, Radiolites, Capri 
Mella weaprinas CaprogimMas >.<. s.cs sis cise naive nie Pras 5 440 
Mam. dex... Sridacmae.—lriddcna 2... .... +044 see 451 
Fam. X. Cardiade.—Cardium, Conocardium.............. 458 
Fam. XI. JLwucinide.—Lucina, Corbis, Tancredia, Diplo- 
donta, Ungulina, Kellia, Montacuta, Lepton, Galeomma 455 
Fam. XII. Cycladide.—Cyclas, Cyrena, Cyrenoides ...... 461 
Fam. XIII. Cyprinide.—Cyprina, Circe, Astarte, Gouldia, 
Crassatella, Isocardia, Cypricardia, Pleurophorus, Cardilia, 
Megalodon, Pachydomus, Pachyrisma, Opis, Cardinia. 
Myoconcha, Cardita, Verticordia ....5..+.2 2c ose 463 
Section C. Srenonma; Sinu-pallialia ’.;.......20.0--005ee08 472 
Fam. XIV. Veneride.—Venus, Cytherea, Meroe, Trigona, 
Artemis, Lucinopsis, Tapes, Venerupis, Petricola, Glau- 
comya eooee eeseeeoese seeeesseeee sees eeoe sees oooe tosses 47% 
_ Fam. XV. Mactride.—Mactra, Harvella, Gnathodon, Lu- 
GMAT, PAA GIT A) ¢101,.0 o's wa a!e eaves osereia SS evens dhaeet eee 477 
Fam. XVI. Tellinide.—Tellina, Gastrana, Capsula, Quen- 
stedtia, Psammobia, Sanguinolaria, Semele, Mesodesma, 
Mryaiia Donax. Galatea: ...)/ 2. cece. s+ .s ulcer eee 479 
Fam. XVII. Solenide.—Solen, Cultellus, Solecurtus...... 486 
Fam. XVIII. Myacide.—Mya, Corbula, Nezra, Thetis, 
Banopea, Glycimens opie. sos. sess ness 1 Oe 489 
Fam. XIX. Anatinide.—Anatina, Ribeiria, Thracia, Phola- 
domya, Myacites, Ceromya, Cardiomorpha, Edmondia, 
Lyonsia, Pandora, Myadora, Myochama, Chamostrea .... 494 
Fam. XX. Gastrochenide.—Gastrochena, Saxicava, Ciava- 
sella, Aspersillum, Humphreyia .........+s-sepeeee 500 
Fam. XXI. LPholalide.—Pholas, Pholadidea, Xylophaga, 
PU CTO ic: o:0'¥.0:0.6 (0 05.3:s%e, 9 8 4 bin! a.a/ainid emacs lune 505 
JSD 010 0 Oe OGIO ODEO OOTP OOO ADR Tre OD On Fra 0: vaewe 100M 
