SUB-KINGDOM MOLLUSCA. 



First Class, 

 Second Class, 

 Third Class, 

 Fourth Class, 

 Fifth Class, 

 Sixth Class, 



BRYOZOA. 



BRACHIOPODA. 



PTEROPODA. 



GASTEROPODA. 



CEPHALOPODA. 



LAMELLIBRANCHIATA. 



CLASS BRYOZOA. 



FAMILY CELLEPORID.E.— Flustra, Paleschara, Sagenella. 



FAMILY ESCHARID^E. — Arthroclema, Clathropora, Coscinium, Eschara, Escharopora, 



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



Stictopora. 

 FAMILY CRISIDjE.— Alecto, Hippothoa. 

 FAMILY RETEPORID^E.— Archimedes, Botryllopora, Carinopora, Cryptopora, Evaeti- 



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



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

 FAMILY THAMNISCIDiE.— Thamniscus. 

 FAMILY TUBULIPORID^E.— Callopora, Ceramopora, Ceriopora, Cyclopora, Hornera, 



Lichenalia, Rhinopora, Trematopora. 



Alecto, Lamouroux, 1821, Exposi. Method. 

 [Ety. mythological name.] 



auloporoides, Nicholson, 1875, Ohio Pal., 

 vol. 2, Cin'ti Gr. [Sig. like AuloporaJ] 



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, Pal. N. Y., vol. 1, 

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

 flated.] 



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

 Foss., 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. 

 Arthroclema, Billings, 1862, Pal. Foss., vol. 



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



twig.] 



