OF CONCHOLOGY. 115 



titles and names to the warm and cold-blooded vertebrata, viz., 

 Tliermalia, Sicremia. Latreille adopted (1825) this view, chang- 

 ing the names to Thematherma and Hsemacryma, under the 

 misleading title of rank or races. 



The following terms seem indispensable to indicate the value 

 of the higher systematic divisions : 



1. Regnum, L., {= Imperium, Raf. Embranchement of French 



authors.) 

 Expl. R. animale, R. vegetabile, R. cryptobiaticum, Buquoi. 



2. Semiregnum, Anth., in Revue et Mag. de Zoologie. 



Expl. Vertebrata and Evertebrata, (= Vertebrata and 

 Articulata* on one side, opposite to the Inarticulata or Mollusca 

 and Radiata on the other. f) 



3. Subregnum, Owen. (Regnum, Raf. ; Typus, Blv. ; Penplades' 



Latr. ; Provincia, Fitz.) 

 Expl. Vertebrata, Articulata, Mollusca. 



4. Siipraclassis,X Raf. (Races, Latr. ; Series, Morch, 1865.) 

 Exp)l. Thermalia, Sicremia, Insecta, Monotocardia, Dioto- 



cardia. 



5. Classis, L. et Auct. 



ExjjI. Mammalia, Aves, Herpetia, Pisces, Mandibulata, 

 Haustellata, Aptera, Androgyna, Exophallia, Pseudophallia, 

 Acephala. 



6. Semiclassis. 



Expl. Placentalia, Aplacentalia, Reptilia, Amphibia, Arach- 

 nida, Crustacea, Coleoptera, Pulmonata, Opisthobranchia. 



7. Suhclassis is perhaps not different from the preceding division. 

 Expl. Macrosthena, Microsthena of Dana ; Geophila, Hydro- 



phila. 



8. Prceordo. 



Expl. Unguiculata, Ungulata Owen, 



9. Or do. 



Expl. Quadrumana, Carnivora, Herbivora, Mutilata. 



10. Suhordo. 11. Familia. 12. Suhfamilia (Phalanx v. d. 

 Hoeven). 



Genus, Subgenus, Species, Subspecies or doubtful species. 



* Acrozoces, 



t Hydrozoces, Lamoraux, Soc. Linn, de Calvados, 1825. 



+ Perhaps more correctly Prceclassis. 



