420 REVIEW3, 



well worthy of notice. His arrangement, compared with that of the 

 French naturalist, De Blainville, 14 whose nomenclature of the Aca- 

 lephse several English writers have followed, is indicated in the sub- 

 joined table. 15 



ACALEPHJE. 



Hschscholtz. J)e Blainville. 



Order I. Cte^ophoka. =± Ciliogeada. 



Order II. Discophoea. ^ 



1. Phanerocarpoe. S = PuLMOOEADA. 



2. Cryptocarpaj. j 



Order III. Siphonophoea. 

 Family 1. 



DlPHYID^!. = DlPHYDA. 



Family 2. 

 Physopiioeid^). = Physogeada. 



Family 3. 



VeLELLID^. 16 = ClEEHIGEADA. 



The Pulmograda and Cirrhigrada form the only two orders of a 

 class to which De Blainville gave the name of Arachnodermata. The 

 remaining Acalephs he associated with the Entozoa and Infusoria 

 in a group of uncertain constitution, which he denned as " faux, 

 mais animaux a tort rapportes aux Zoophytes." His vague and 

 erroneous statements as to the affinities of these organisms, present 

 a striking contrast to the tersely accurate scientific descriptions, 

 wherein, no less than in his incomparably richer stores of knowledge 

 gained by observation, Eschscholtz appears superior to his French 

 contemporary. 



More recently, Edward Forbes, 17 followed by Lutken, 18 and Gre- 

 genbaur, 19 gave greater definiteness to the leading groups of Disco- 

 phora, introducing various improvements into the limitation of the 

 several families. Other modes of sub-dividing the Acaleplije had, it 

 is true, long before been proposed by Peron et Lesueur, 20 Brandt, 21 

 and Lesson, 22 but never having been generally received, and present- 

 ing no advantages over the classifications mentioned above, they do 

 not call for any detailed consideration. 



11 Article " Zoophytes" in Dictionnaire cles Sciences Naturelles, 1830, and 

 Manuel d' Actinologie ou de Zoophytologie, 1 834. 



,5 With various slight modifications De Blainville's names have been adopted 

 by Carpenter, E. Forbes, Grant, Rymer Jones, and Owen. 



16 The families of the two preceding orders have, for obvious reasons, been ex- 

 cluded from this table. 



17 A Monograph of the British Naked-eyed Medusae, 1848. 



18 Videns. Med., 1850, p. 15. 



19 Versuch eines Systems der Medusen, &c. Z. W. Z., 1857, Band. 8, p. 202. 



20 Annales du Museum, 1809. 



21 Prodromus, &c, Petersb. Mem., 1833. 



22 Acaleph.es, in Nouvelles Suites a Buffon, 1843. 



