80 Moll 
VII. MOLLUSC A. 
IV. PELECYPODA. 
Mollusca trawled by ‘Thetis’ off New South Wales, with n. spp. and 
figures of some previously known species; Hedley (219). 
Morphology and classification of the Pelecypoda ; Noetling (372). 
Structure of the Bivalve Hinge; Reis (444). 
Structure of gills in Pelecypoda; Ridewood (449). 
SEP TIB PA N CHIA TA. 
Cetoconcha scapha, Gulf of Panama; Dale, P. U. S. Mus. xxiv, p. 561 : 
n. sp. 
E ULA MEL LIBRA NCHIA TA . 
ANATINACEA. 
Asthenothcerus hemphilli, figd.; Dall, P. U. S. Mus. xxiv, p. 510. 
Pandora grandis, Dall, Neogene specimen figd.; Rivers (450); P. bushiana, 
trilineata , goiddiana , figd.; Dall, P. U. S. Mus. xxiv, p. 511. 
PHOLADACEA. 
t Xylophomya, n. gen. for X. laramiensis, n. sp., Secondary, N. America; 
Whitfield, Bull. Amer. Mus. xvi, p. 75, fig. 
MYACEA and CARDIACEA. 
Cardium striatulum , n. var.; Hedley, Mem. Austral. Mus. iv, p. 322. 
Chama lactuca , figd.; Dall, P. U. S. Mus. xxiv, p. 509. 
Hippopus , anatomy and morphology; Lacaze-Duthiers, Arch. Zool. exp. 
x, pp. 99-212, figg. 
f Hippurites, classification ; Toucas (555). 
Lutricola cognata, Galapagos ; Pilsbry & Vanatta, P. Washington Ac. iv, 
p. 556, fig.: n. sp. 
Panomya ampla , figd.; Dall, P. U. S. Mus. xxiv, p. 560. 
Panopea globosa , figd. ; Dall, t. c. p. 560. 
Solen , anatomy of British species; Bloomer (48). 
t Tamiosoma , Conrad, is a Balanus ; Dall, Science xv, p. 5. 
Tridacna elongata , anatomy and morphology; Lacaze-Duthiers, Arch. 
Zool. exp. x, pp. 99-212, figg. 
VENERACEA and TELLINACEA. 
Agriopoma , n. sect, of Meretrix for Cytherea texasicina , Dall, with fig.; 
Dall, P. U. S. Mus. xxiv, p. 509: also op. cit. xxvi, p. 353. 
Anomalodiscus , n. sect, of Anomalocardia , type Cytherea squamosa, Lam.; 
Dall, op. cit. xxvi, p. 359. 
Austrodosinia , n. sect, of Dosinia , type Cytherea anus, Phil.; Dall, t. c. 
p. 347. 
Callithaca, n. sect, of Protothaca (q. v.), type Tapes tenernma, Cptr. ; Dall, 
t. c. p. 364. 
Callocardia (Agriopoma) zonata, North Carolina, p. 381, catharia, Panama, 
p. 402 ; Dall, t. c. : n. spp. 
