SUB-KINGDOM MOLLUSCA. 



FiKST Class, 

 Second Class, 

 Third Class, 

 Fourth Class, 

 Fifth Class, 

 Sixth Class, 



BRYOZOA. 



BRACHIOPODA. 



PTEROPODA. 



GASTEROPODA. 



CEPHALOPODA. 



LAMELLIBRANCHIATA. 



CLASS BRYOZOA. 



FAMILY CELLEPORID^.— Flustra, Paleschara, Sagenella. 



FAMILY ESCHARIDjE.— Arthroclema, Clathropora, Coscinium, Eschara, Escharopora, 



Glauconome, Helopora, Intricaria, Phsenopora, Ptilodictya, Semicoscinium, 



Stictopora. 

 FAMILY CRISID^.— Alecto, Hippothoa. 

 FAMILY RETEPORID^.— Archimedes, Botryllopora, Carinopora, Cryptopora, Evacti- 



nopora, Fenestella, Fenestralia, Gorgonia, (7) Hemitrypa, Ichthyorachis, Lyropora, 



Phyllopora, Polypora,Ptilopora, Retepora, Septopora, Synocladia, Tseniopora. 

 FAMILY THAMNISCID^.— Thamniscus. 

 FAMILY TUBULIPORIDjE. — Callopora, Ceramopora, Oeriopora, Cyclopora, Hornera, 



Lichenalia, Rhinopora, Trematopora. 



Alecto, Lamouroux, 1821, Exposi. Method. 

 [Ety. mythological name.] 



auloporoldes, Nicholson, 1875, Ohio Pal., 



vol. 2, Cin'ti Gr. [Sig. like Aulopm-a.'] 



,, canadensis, Nicholson, 1875, Can. Nat. 



& Geol. , Corniferous Gr. [Ety. proper 



name.] 



confusa, Nicholson, 1875, Ohio Pal., vol. 

 2, Cin'ti Gr. [Sig. confused.] 



frondosa, James, 1875, Ohio Pal., vol. 2, 

 Cin'ti Gr. [Sig. branchy.] 



inflata. Hall, 1847, Pah N. Y., vol. 1, 

 Trenton & Hud. Riv. Gr. [Sig. in- 

 flated.] 



nexilis, James, 1875, Int. to Catal. Cin. 

 Fobs., Cin'ti Gr. [Sig. wreathed to- 

 gether.] 

 Archimedes, LeSueur, 1842, (Retepora arch- 

 imedes) Am. Jour. Sci., vol. 43. [Ety. 

 from its resemblance to the machine 

 for raising water, consisting of a tube 

 rolled in a spiral form round a cylin- 

 der, invented by Archimedes, a Greek 

 mathematician.] 



laxa. Hall, 1857, Proc. Am. Ass'n Ad. 



Sci., vol. 10, Kaskaskia Gr. [Sig. 



loose.] 

 meekiana. Hall, 1857, Proc. Am. Ass'n 



Ad. Sci., vol. 10, Kaskaskia Gr. [Ety. 



proper name.] 

 oweniana. Hall, 1857, Proc. Am. Ass'n 



Ad. Sci., vol. 10, Keokuk Gr. [Ety. 



proper name.] 

 reversa. Hall, 1858, Geo. Rep. Iowa, War- 

 saw Gr. [Ety. from the reversed direc- 

 tion of the spiral frond.] 

 swalloviana. Hall, 1857, Proc. Am. Ass'n 



Ad. Sci., vol. 10, Kaskaskia Gr. [Ety. 



proper name.] 

 wortheni. Hall, 1857, Proc. Am. Ass'n 



Ad. Sci., vol. 10, Warsaw Gr. [Ety. 



proper name.] 

 Archimedipora, D'Orb., 1849, Prod, de Pal. 



Syn. for Archimedes. 

 archimedes, see Archimedes. 

 Akthroclema, Billings, 1862, Pal. Fobs., vol. 



1. [Ety. arthron, a joint; hlema, a 



twig.] 



