MOLL USCABRACHIOPODA . 



CLASS II. PELECV 



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Characteristics of the Pelecypoda... 616 

 Order I. Protobranchiata. 



Nutshells, Etc 620 



Order II. Filibranchiata. 

 Sub-order i. Anomiaceae. 



The Saddle Oyster, Etc. ... 621 



Sub-order ii. Arcacea. 



Noah's Ark Shells, Etc. ... 621 



Sub-order iii-. Trigoniacea. 



The Trigonia 621 



Sub-order iv. Mytilacea. 



The Marine Mussel, Etc. ... 621 



Order III. Pseudolamellibranchiata. 



The Oyster, Etc. 622 



Sub-order i. Aviculacea. 



Swallow Shells, Etc 622 



Sub-order ii. Ostreacea. 



Oysters ... ... ... ... 622 



PODA (BIVALVES}. 



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Sub-order iii. Pectinacea. 



Scallops, Etc. ... ... ... 622 



Order IV. Eulamellibranchiata. 

 Sub-order i. Submytilacea. 



Fresh- water Mussels ... ... 623 



Sub-order ii. Tellinacea. 



Sunset Shells, Etc. ... ... 624 



Sub-order iii. Veneracea. 



The Venus Shells, Etc 625 



Sub-order iv. Cardiacea. 



The Cockles, Etc. ... ... 625 



Sub-order v. Myacea. 



The Mya or Gaper, Etc. ... 626 



Sub-order vi. Pholadacea. 



The Piddock and Ship-worm, Etc. 627 

 Sub-order vii. Anatinacea. 



Pandora, Etc. ... ... ... 627 



Order V. Septibranchiata. 



Poromyidae, Etc. .., ... 628 



CLASS III. SCAPHOPODA. 



Scaphopoda or Solenoconcha ... 628 | The Elephant's-tooth Shells 



628 



CLASS IV. < 



SUB-CLASS A. STREPTONEURA. 

 Order I. Scutibranchiata. 



The Limpets, Etc. 

 Sub-order i. Docoglossa. 



The Common Limpet, Etc. 

 Sub-order ii. Rhipidoglossa. 



The Keyhole Limpet, Etc. 

 Order II. Pectinibranchia'.a. 



(The Marine Gastropods) 

 Sub-order i. Gymnoglossa. 



(Parasitic Mollusca) 

 Sub-order ii. Ptenoglossa. 



The Purple Sea-snails, Etc. 

 Sub-order iii. Taenioglossa. 



The Cowries, Etc. 

 Sub-order iv. Rachiglossa. 



The Dog-periwinkle, Etc. 



631 

 631 

 631 



032 



633 

 633 

 633 



637 



GASTROPODA. 



Sub-order v. Toxoglossa. 



The Cone Shells, Etc 638 



SUB-CLASS B.- EUTHYNEURA. 

 Order I. Opisthobranchiata. 

 Sub-order i. Tectibranchiata. 

 Group A. Bulloidea. 



The Bulla, Etc 640 



Group B. Aplysioidea. 



The Sea-hares, Etc. ... ... 640 



Group C. Pleurobranchoidea. 

 Sub-or>!er ii. Nudibranchiata. 



The Sei-slugs .. ... ... 640 



Order II. Pulmonata. 



Land Mollusca ... ... ... 641 



Sub-order i. Basommatophora. 



Pond-snails, Etc. ... ... 641 



Sub-order ii. Stylommatophora. 



Land-snails, Eic. 



CLASS V. CEPHALOPODA. 



Order I. Tetrabranchiata. 



The Nautilus , 



Order II. Dibranchiata. 



6 45 



| Sub- order i. Dec i pod a. 



The Cuttle-fish, Etc. 



Sub-order ii. Octopoda. 



The Argonaut, Etc. 



SUB-KINGDOM IV. BRACHIOPODA. 



LAMPSHELLS, &c. 

 Characteristics of Brachiopods ... 649 | Lampshells, Etc. ... 



642 



646 

 647 



649 



