LIST OF ILLUSTRATIONS xxix 



II". PACK 



569. Chiton, nephridial and genital systems 669 



570. ,, development . . . 670 



571. Triton nodiferus, shell 672 



572. Triton nodiferus, shell, median section 673 



573. ,, ,, operculum 674 



574. , , , , lateral view of body 674 



575. , , , , diagram of introvert 675 



576. ,, ,, dissection fron^ dorsal side 677 



577. ,, ,, buccalmass 678 



578. ,, ,, vertical section of buccal cavity .... 678 



579. ,, ,, nervous system from dorsal side .... 680 



580. ,, ,, ,, ,, and related parts, lateral view . 681 



581. ,, ,, section of eye 682 



582. Solarium perspectivum 685 



583. Terebra oculata 686 



584. Cyprsea moneta 687 



585. Doris tuberculata . . . . . . . . . . .687 



586. Carinaria mediterranea " . . . 687 



587. Limax -. . 687 



588. Sigaretus Irevigatus 688 



589 Aplysia 688 



590. Shell-bearing Pteropoda . . .689 



591. Atlanta peronii 689 



592. Pterotrachea scutata . . '690 



593. Helix nemoralis 690 



594. Pleurophyllidia lineata . 691 



595. Patella vulgata 691 



596. Pulmonary cavity and related parts in Limax 692 



597. Nervous system of Patella 693 



598. Diagrams of displacement of mantle-cavity, &c. .... 694 



599. Nervous system of Aplysia 695 



600. ,, ,, ,, Limmeus . . . . . . . .695 



601. Eyes of Gastropoda 696 



602. Osphradium of Murex 696 



603. Reproductive organs of Helix 697 



604. Hermaphrodite gland of Gastropoda 698 



605. Forms of egg-cases in Gastropoda 699 



006. Segmentation and formation of germinal layers in Gastropoda . 700 



607. Early development of Patella 701 



608. Trochospheres of Patella 702 



609. Later trochosphere of Patella 703 



610. Veliger of Vermetus . . .704 



611. Diagram illustrating the relationships of the Gastropoda . . 70o 

 (512. Dentalium, section of shell . . 706 



613. ,, anatomy 706 



614. * larvae 706 



<>147m. Rhodope 



615. Sepia cultrata 709 



(5 Hi. sucker . 710 



