GENERAL INDEX. xxix 



Page Sec. 



Nervous system of Buccinnm 546 . 1458 



Pterotrachea 546 . 1459 



Snail 546 . 1460 



Structure of tentacles in the marine GASTEROPODA 547 . 1461 



" Auditory capsules " 548 . 1462 



of Tergipes Edwardsii 548 . 1463 



Generative system of the GASTEROPODA ; .i ~. . 549 . 1464 



Structure of the generative apparatus in the CYCLOBRANCHIATA, 



SCUTIBRANCHIATA, and TuBULIBRANCHIATA 549 . 1465 



The Pectinibranchiata all dioecious 549 . 1466 



Structure of male generative organs 549 . 1467 



female generative organs 550 . 1468 



Hermaphroditism of the HETEROPODA 550 . 1469 



Female apparatus 550 . 1469 



Male apparatus 550 . 1470 



Hermaphroditism of the TECTIBRANCHIATA, INFEROBRANCHIATA, 



NUDIBRANCHIATA, and PULMONATED GASTEROPODS .... 550 . 1471 



Male apparatus of Patella 550 . 1472 



Female apparatus of Patella 550 . 1473 



Structure of ova and development of embryo of the NUDIBRAN- 

 CHIATA 551 1474 



CHAPTER XXIII. 

 PTEEOPODA. 



PTEROPODA General character of the class 552 1478 



Anatomy of Clio borealis 553 1480 



External structure of Clio 553 1481 



. Cephalic appendages and extraordinary prehensile apparatus . . 554 1482 



Hoods 554 1483 



Tentacula 554 1484 



Mouth .... 555 1485 



Structure of jaws 555 1486 



Muscular cylinders wherein the jaws are lodged 555 1487 



Action of these remarkable dental organs 556 1488 



Structure of the tongue 556 1489 



Arrangement of the alimentary system 556 1490 



Respiratory apparatus of Clio 556 1491 



Heart and systemic vessels 556 1493 



Nervous system of Clio 556 1494 



Senses 557 1495 



Structure of eyes 557 1495 



Generative apparatus 557 1496 



Singularly formed penis 558 1497 



Hyalaa 558 1501 



Pneumodermon 559 1502 



CHAPTER XXIV. 

 CEPHALOPODA. 



CEPHALOPODA General characters of the class . . . -v ... ... . 559 1503 



Octopus vulgaris 559 1505 



Structure of "cephalic arms" 559 1506 



" Arms " of the Calamary (Loligo) 560 1508 



Organization of tentacular suckers 561 1509 



inthePoulpe . . ,.,,.,; ,, . 561 1510 



Onychoteuthis .... 561 1511 



Argonaut or Paper Nautilus v ;.;,!.. 563 1512 



Nautilus Pompilius 565 1517 



