Chap. II. CLASSIFICATIONS OF ACALEPHS. 137 



CLASSIFICATION OF DeBLAINVILLE, 1830-1834. 



DeBlainvillo has introduced groat modifications in the classification of the Acalephs, part of vvliicli 

 he removed to the Jlolhisks. The following diagram gives a general idea of his views respecting the 

 classification of the lower animals: — 



Zoophytes. 1. False Zoophytes, to be referred to the Mollusks : Physogrades and Diphyes, or 



perhaps to the Holothurians : Ciliobranches. 

 " " " " to the Articulates. Entozoa. 



" " forming a heterogeneous assemblage of very small animals. Infusoria. 



2. Genuine Zoophytes. Actinozoaria, containing 5 Classes: Cirrhodermaria, Arachuo- 



dermaria, Zoantharia, Polypiaria, and Zoophytaria. 

 A m o p h o z o a r i a : Spongia-. 



3. False Zoophytes, to be referred to the vegetable kingdom : Corallin;v, Nematozoa, Psy- 



chodiaria. 

 " " neither animals nor plants. ZoiJspei'ms and Nullipores. 



It appears from this sketch of DeBlainville's system, that he considers the Siphonophorn^ of Esch- 

 scholtz as Mollusks, and the Ctenophorre either as Mollusks or Eehinoderms. The other Acalephs he 

 calls Aeachnodermaria, and divides them in the following manner : — 



1st Order. Pdlmograda. 



1st Section. Simple Pulmogrades : Eudora, Ephyra, Phorcynia, Eulimenes, Carybdea, Euryale. 

 2d Section. Tentaculate Pulmogrades : Berenice, -^quorea, Mesonema, Polyxena, ^Egina. 



Cunina, Faveolia, Eurybia, Pegasia, Obelia. 

 3d Section. Subproboscidate Pulmogrades : Oceania, Aglaura, INIelicerta, Cytaeis, Thauniantias, 



Tima, Campanella. 

 4th Section. Proboscidate Pulmogrades : Orythia, Geryonia, Saphenia, Dianea. Linuche, Favonia, 



Lymnorea, Sthenonia. 

 5th Section. Brachiate and pedunculate Pulmogrades : Ocyroe, Cassiopea, Aurelia, Melitea, 



Evagora, Cepliea, Rhizostoma, Chrysaora, Pelagia. 

 2d Order. Cirrhograda. Velella, Rataria, Porpita. 



The Hydroids are referred to the class of Polypiaria. An earlier diagram of these animals was 

 published by DeBlainville in 1822, in his work " De I'Organisation des Animaux." See vol. 1 of this 

 work, p. 198. 



DeBlainville did not enjoy the same lavorable opportunities for the study of 

 the Acalephs as Esclischoltz ; and yet he is the author of an original classification 

 of these animals, which differs entirely from those of his predecessors. Eminent 

 as a closet student, and deeply imbued with the conviction that Zoology required 

 great reforms, and that methods may supply the deficiency of actual knowledge, 

 he never hesitated in introducing great changes in the classification of the animal 

 kingdom whenever a suggestion was presented to his mind, and without awaiting 

 the opportunity for making the necessary investigations to test its accuracy and 



VOL. III. 18 



