9 2 



INTRODUCTION. 



b. Cheilostomata 



c. Ctenostomata 



Cellepora, Eschar a, Lepralia, Flustra, Bugula. 

 Vesicularia, Alcyonidium. No fossil forms. 



i. Inarticulata 

 2. Articulata 



Sub-class II. — Entoprocta. 



Loxosoma, Pedicellina. No fossil forms. 



Sub-class III. — Aspidophora. 



Rhabdoplenra. No fossil forms. 



CLASS II.— BRACHIOPODA. 



Crania, Discina, Lingula,* Lingulella,* Acro- 



treta. 

 Terebrattda, Rhynchonella, * Spirifera, * Stro- 



phomena, * Orthis, * Pro duct a. 



SUB-KINGDOM VI.— MOLLUSCA. 

 CLASS I.— LAMELLIBRANCHIATA (CONCHIFERA or PELECYPODA). 



i. Ostreacea 



2. Pectinacea 



3. Mytilacea 



4. Arcacea . 



5. submytilacea 



6. Erycinacea 



7. Cardiacea 



8. Chamacea 



9. conchacea 



10. Myacea . 



11. Adesmacea 



12. Lucinacea 



13. Telllinacea 



14. Anatinacea 



Ostrea, * Grypha:a, Anomia. 

 Spondylus, Lima, Pecten. 

 Avicula, * Aviculopecten, Afytilus, Pinna. 

 Area, Pectuncuhts, Nucula. 



* Modiolobsis, Trigonia, Unio, Astarte, Crassa- 



tella. 



* Eryciua, Galeomma. 



Tridacna, Cardinal, * Liinulicardium. 

 Cham a, * Diceras, * Caprina, * Hippnrites. 

 * Megalodon, Cyprina, Venus, Cyj'ena, Psam- 



mobia, So/en, Donax. 

 Mactra, Mya, Glycimeris, Gastrochccna. 

 Pholas, Teredo. 

 Lucina, Corbis. 

 Tellina, Scrobicularia. 

 Sole mya. Anatina, Pholadomya, Clavagella. 



CLASS II.— GASTROPODA. 

 Sub-Class I. — Branchiogastropoda. 



1. Prosobranchiata 



2. Opisthobranchiata 



3. Pteropoda. 



a. Gymnosomata 



b. Thecosomata 



4. Heteropoda 



Buccinum, Strombus, Littorina, Natica, * Mur- 



chisonia. 

 Actccoji, Bulla, Aplysia, Doris. 



Clio, Pneumodermon. No fossil forms. 

 Cavolinia, Cleodora, * Hyolithes, * Tentactdites. 

 Carinaria, Atlanta. 



Sub-class II. — Pulmogastropoda. 



Stylommatophora . . Helix, Limax. 



Limnaia, Plauorbis. 



2. Basommatophora 



Chitonid^e 



I. SOLENOCONCHIA 



CLASS III.— POLYPLACOPHORA. 



Chiton, * Helminthochiton. 



CLASS IV.— SCAPHOPODA. 



. Dentalhtm. 



