MOLLUSCA AND SHELLS. 15 
PLATE 41. 
Fig. 562. Mytinus (Modiola) AREOLATUS, lateral, and 562 a, 
dorsal views of the shell.—p. 452. 
Beeb Tacs ae aires 4 F : 
Fig. 563. Myritvus (Modiola) neparticus, side of the shell, ex- 
terior and interior ; 563 a, dorsal view of the shell.—p. 454. 
Fig. 564. Myrtinus PYRIFORMIS, lateral, and 564 a, dorsal views 
of the shell—p. 451. 
Fig. 565. Myrinus DIVARICATUS, lateral, and 565 a, dorsal views 
of the shell.—p. 449. 
Fig. 566. Myrinus argosus, lateral view of the shell, exterior 
and interior ; 566 a, back of the shell.—p. 450. 
Fig. 567, Myrtitus rrossutus, lateral view of the shell, exterior 
and interior; 567 a, back of the shell.p. 450. 
Fig. 568. GaimarDIA TRAPESINA, lateral view of the shell and 
animal ; 568 @, dorsal view of the shell, in outline; 568 b, ventral 
margin, showing the opening of the mouth; 568 ¢, the branchie ; 
O68 d, the viscera; 568 e, two views of the foot; 568 7, the mouth 
and palpi.—p. 459. 
Pe es aa 
Fig. 569. PecteN cavurtnus, the upper valve; 569 a, the lower 
valve ; 569 b, edge view of the shell.—p. 458. 
magnified ; 581 d, and 581 e, views of the internal apophysis.-—p. 
467. 
Fig. 582. Trresraruta caurtna, lateral view of the shell; 
582 b, the shell, edgewise ; 582 c, details of sculpture, magnified ; 
582 d, and 582 e, views of the apophysis.—p. 468. 
Fig. 583. TrErEBRATULA Patagonica, lateral view of the shell; 
083 b, edge view of the shell, in outline ; 583 ¢, details of sculp- 
ture, magnified.—p. 469. 
Fig. 584. CRENATULA PERGAMINEA, lateral, and 584 a, dorsal 
views of the shell; 584 4, the hinge.—p. 447. 
Fig. 585. Mytinus (Modiolarea) pusituus, lateral, 585 a, dorsal, 
and 585 b, hinge views of the shell, enlarged ; 585 ¢, natural size. 
—p. 455, 
Fig. 586. Eryorma (Kellia) QUADRATA, lateral, and 586 a, dorsal 
_ views of the shell; 586 4, the hinge, magnified; 586 ¢, natural 
Fig. 570. Pecren nericivs, the upper valve; 570 a, the lower 
valve ; 570 6, edge view of the shell; 570 c, details of sculpture, 
upper valve.—p. 457, 
Fig. 571. Prcren tatvs, the upper valve, exterior and interior; 
p. 406. 
d7La, the lower valve; 571 4, details of sculpture, 
ode Os A ee 
~ 
Fig. 573. Liwa rraci is, the three series of tentacles : (1) short 
and whitish, (2) medium iength, pale, annulated with red, (3) 
long, red banded; 573 a, edge view of the animal, showing the 
mantle, mottled with scarlet spots, a range of large ones next the 
shell, also part of the branchize and the scarlet body ; 573 6, the 
opposite edge view, showing the branchix forced out, also the 
siphon and the adductor muscle; 573 ce, tentacle, enlarged, with 
its annuli and colored bands; 573 d, branchia, showing its flow- 
ing, undulating character, crimped and folded like the letter W. 
Fig. 575. OstREA MORDAX, group of shells; 575, interior of | 
the lower valve ; 575 4, inside of the upper valve.—p. 464. 
Fig. 576. Ostrea circumsura, exterior of an elongated speci- 
men; 5764, interior of the lower valve of a rounded specimen ; 
576 6, upper valve of the same.—p. 462. 
Fig. 577. OsTREA GLoMERATA, a group of shells; 577 a, interior, 
and 077 6, exterior of a single specimen.—p. 461. 
PLATE 44, 
Fig. 578. OstREA pIscoIDEA, view of the exterior, and 578 a, | 
interior of the upper valve; 578 6, exterior of the lower valve. 
—p. 463. 
Fig. 580. Crants RADIOSA, the upper, and 580 a, the under | 
valve, enlarged ; 580 6, edge view of the shell; 580, interior of | 
the under valve; 580d, slit for the tendon, magnified; 580 e, 
natural size.—p. 465. 
Fig. 581. TerEBRATULA PULVINATA, lateral view of the shell; 
581 6, edge of the shell, in outline; 581, details of sculpture, 
size.—p. 402. 
Fig. 587. Erycrna (Poronia) OVATA, lateral, and 587 a, dorsal 
views of the shell, enlarged ; 587 6, the hinge, magnified ; 587 ce, 
natural size.—p. 401. 
PLATE 46. 
Fig. 585". ARGONAUTA GENICULATA, lateral view of the animal ; 
985 a, dorsal view of the animal; 585 6, the mouth and circle of 
arms, and the origin of the series of cupules; 585 c¢, the jaws ; 
585 d, arrangement of the cupules where they diverge; 585 e, 
two cupules, magnified; 585 7, joint of veliferous tentacles, inner 
p. 470, 
Fig. 586*. Ocropus MEGALOCYATHUS, dorsal, and 586 a, ventral 
surface. 
views of the animal, reduced; 586 6, mouth and circle of arms, 
with the arrangement of the cupules ; 586 ¢, cupule, from above ; 
086 d, lateral view of a cupule.—p. 471. 
PLATE 46. 
Fig. 587%, Octopus mimus, dorsal, and 587 a, ventral views of 
the animal; 587 4, mouth, and circle of arms; 537 ce, the mouth 
and jaws; 587d, a cupule, in profile ; 587 e, cupule, seen from 
above.—p. 475. 
PLATE 47, 
Fig. 588. Octopus TeEtricus, dorsal view of the animal ; 088 a, 
ventral view; 588 4, face of a cupule; 588 c, interior of a cupule; 
p. 474, 
Fig. 589. Octopus rurvus, dorsal, and 589 a, ventral views of 
988 d, profile view of a cupule. 
the animal; 589 4, cupule, seen from above; 589 c, profile of a 
cupule.—p. 475. 
PLATE 48. 
Fig. 590. Octorus ornatus, dorsal view of the animal; 590 a, 
ventral view, showing the interior of the umbrella and the mouth; 
590 6, cupule, from above ; 590, cupule, in profile.—p. 476. 
Fig. 591. Ocrorus pusiiius, dorsal view of the animal, natural 
size; 591 a, the umbrella and mouth; 591, the. abdomen and 
respiratory sac.—p. 478. 
Fig. 592. Ocropus Motus, dorsal view of the animal, natural 
size; 092, the umbrella and mouth; 592 2, ventral view of the 
body.—p. 479. 
ae 
= — ee 
7 
