14 
Fig. 512. AMPHIDESMA CROCEUM, exterior, and 512 a, interior of 
the shell; 512 b, dorsal view.—p. 399. 
Fig. 513. PSAMMOBIA FLORIDA, lateral, and 513 a, dorsal views 
of the shell; 513 6, the hinge.—p. 403. 
Fig. 514. TELLINA LAUTA, lateral view of the shell, enlarged ; 
514 a, interior of the shell; 5146, dorsal view, in outline.—p. 
408. 
Fig. 515. TELLINA COMPTA, lateral view of the shell, enlarged ; 
515 a, interior of the shell; 515, back of the shell, in outline. 
—p. 406. 
Fig. 516. TELLINA PERULA, exterior of a red, and of a white 
specimen; 516 a, a white specimen; 516 b, dorsal view; 516 c, 
the hinge, enlarged ; 516 d, inside of a red specimen.—p. 409. 
Fig. 517. TELLINA EXCULTA, lateral view of the right valve, and 
517 a, front of the left valve; 517 b, dorsal view of the shell.— 
p. 407. | 
Fig. 518. TELLINA TITHONIA, lateral view of the shell, 518 a, 
interior, with the hinge; 518 b, dorsal view of the shell.—p. 405. 
PLATEGÍ 26 
Fig. 519. TELLINA CONCENTRICA, lateral, and 519 a, dorsal views 
of the shell; 519 b, the hinge.—p. 404. Së 
Fig. 520. DonAx PALLIDUS, lateral view of the shell, 520 a, 
interior, with the hinge; 520 b, dorsal view of the shell.—p. 410. 
Fig. 521. Donax TINCTUS, lateral, and 521 a, dorsal views of the 
shell.—p. 411. 
Fig. 922. Donax CROCATUS, lateral, and 522 a, dorsal views of 
the shell, magnified, 522 b, natural size.—p. 412. 
Fig. 023. LUCINA RAMULOSA, lateral view of the shell; 523 a, 
inside, with the hinge, 523 D, dorsal view of the shell.—p. 415. 
Fig. 524. LUCINA INCULTA, lateral view of the shell, 524 a, 
inside, with the hinge; 524 b, back of the shell. —p. 412. 
Fig. 525. LUCINA VESICULA, exterior of the shell; 525 a, inte- 
rior, with the hinge; 525 5, dorsal view of the shell.—p. 414. 
Fig. 526. CYCLAS EGREGIA, lateral, and 526 a, dorsal views of 
the shell, 526 6, the hinge.—p. 425. 
Fig. 527. OYCLAS PATELLA, lateral, and 527 a, dorsal views of 
the shell; 527 b, the hinge.—p. 426. 
Fig. 928. LUCINA LENTICULA, lateral, and 528 a, dorsal views of 
the shell; 528 6, the hinge.—p. 413. 
Fig. 529. CYRENA DEBILIS, lateral, and 529 a, dorsal views of 
the shell, 529 b, the hinge.—p. 427. 
Fig. 532. CARDITA VENTRICOSA, lateral, and 532 a, dorsal views 
of the shell.—p. 417. | 
Fig. 583. CARDITA PROCERA, lateral view of the shell.—p. 416. 
Fig. 584. CARDIUM BLANDUM, lateral, and 534 a, dorsal views of 
the shell.—p. 418. 
PLATE(35) 37 
Fig. 535. CYPRICARDIA ROSEA, lateral, and 535 a, dorsal views 
of the shell, 585 b, interior, with the hinge.—p. 389. 
Fig. 536. ARTHEMIS LAMBATA, lateral, and 536 a, dorsal views 
of the shell.—p. 422. 
Fig. 537. VENUS TOREUMA, lateral, and 537 a, dorsal views of 
the shell.—p. 419. 
Fig. 538. VENUS RIGIDA, lateral view of a dilated specimen ; 
938 a, side of a medium specimen; 538 b, dorsal view of the lat- 
ter.—p. 420. 
MOLLUSCA AND SHELLS. 
Fig. 539. NUCULA SULCULATA, lateral, and 589 a, dorsal views 
of the shell, enlarged, 539 b, the hinge, magnified ; 539 c, natural 
size.—p. 424. 
Fig. 540. Unio porsuosus, lateral, 540 a, dorsal, and 540 b, in- 
terior views of the shell. —p. 430. 
Fig. 541. Uxio VERECUNDUS, lateral view of the shell; 541 a, 
interior, with the hinge, 541 2, back of the shell; 541 c, undula- 
tions of the beak, in detail. —p. 431. 
Fig. 942. UNIO LUTULENTUS, lateral, 542 a, interior, and 542 b, 
dorsal views of the shell; 542 c, lateral view of the animal. —p. 
428. 
PLATE (36.) 39 
Fig. 543. Unio PROFUGUS, lateral, 543 a, dorsal, and 543 5, in- 
terior views of the shell —p. 429. 
Fig. 544. Unio FAMELICUS, lateral, 544 e, interior, and 544 5, 
dorsal views of the shell. —p. 432. 
Fig. 945. ALASMODONTA FALCATA, lateral view of the valves, 
with the hinge; 545 a, dorsal view of the shell. —p. 433. 
Fig. 946. ANODONTA COGNATA, lateral view of the shell, with 
the hinge; 546 a, dorsal view of the shell. —p. 435. 
Fig. 947. ANODONTA FEMINALIS, lateral view of the shell; 547 
a, interior, with the hinge; 547 b, back of the shell —p. 436. 
Fig. 948. ANODONTA PUBERULA, lateral, and 548 a, dorsal views 
of the shell; 548 b, the hinge, and interior. —p. 434. 
PLATE (87) 39 
Fig. 549. AVICULA PICA, exterior, and 549 a, interior surfaces of 
the shell; 549 b, edge view of the shell. —p. 443. 
Fig. 950. AVICULA LURIDA, lateral view of the exterior; 550 a, 
the inside of the shell, 550 b, edge view of the shell —p. 440. 
Fig. 551. AVICULA FUCATA, exterior surface; 551 a, interior 
surface of the shell; 551 b, edge view of the shell. —p. 441. 
Fig. 992. AVICULA GLABRA, outer, and 552 a, inner surfaces of 
the shell, 552 6, edge view of the shell.—p. 442. 
Fig. 553. AVICULA VIDUA, exterior, and 553 a, interior surfaces 
of the shell; 553 b, edge view of the shell. —p. 439. 
PLATE Ge) nb. 
Fig. 954. AVICULA NIGRA, exterior surface of the shell; 554 b, 
edge of the shell.—p. 438. 
Fig. 555. AVICULA MARGARITIFERA, view of the interior, in out- 
line.—p. 437. | 
Fig. 556. PERNA NANA, exterior, and 556 a, interior surfaces of 
the shell, 556 b, edge of the shell.—p. 445. 
Fig. 557. PERNA EREMITA, exterior, and 557 a, interior surfaces 
of the shell; 557 b, an elongated form; 557 c, a young specimen, 
showing the sculpture; 557 d, edge view of the shell.—p. 446. 
Fig. 558. PERNA TORVA, exterior, and 558 a, interior views of 
the shell, 558 b, edge of the shell.—p. 445. 
Fig. 959. PERNA ARGILLACEA, outside of the shell; 559 a, in- 
side of the shell; 559 b, edge of the shell —p. 444. 
Fig. 560. Arca SOBRIA, lateral, and 560 a, dorsal views of the 
shell. —p. 423. 
Fig. 561. Myrtus (Modiola) FLABELLATUS, lateral, and 561 a, 
dorsal views of the shell. —p. 453. 
