Remarks on Zoological Classification. 485 



since so entirely changed, that a reference to his Work will 

 not carry us very far. The Cuvierian Table to be found at 

 the end of Griffith's Translation, takes us nearer to the pre- 

 sent views of Classification, but the Scale of Genera is so ex- 

 tremely high and so inadequate to necessary subdivision, as 

 to remind us of the wide I iinnaean Genera. It will perhaps 

 be better to enumerate the references of the leading Struc- 

 tures, where these Publications principally fail us : — > 



The Infusoria, Polypi, and other Elementary Structures are 

 as yet in the same loose state, as the Fungi, Lichens, and Al- 

 gae of Botany ; the place of many in the System is disputed, 

 and the stations deviate widely; Ehrenberg, Blainville, Milne 

 Edwards, and Farre may be consulted. 



The Amgebales are the Gymnica, Epitricha, Pseudopodia; 

 Enantiotreta, and Allotreta of Ehrenbergh. 



The Flustrales may represent the Bryozoa of Ehrenbergh, 

 and the Ciliobrachiata of Farre; they open with Ehienbergh's 

 Katotreta and Anopisthia. 



Sertulariales may represent the Hydriform Polypes of 

 Farre ; Madreporales are nearly his Zoanthiform Polypes. 

 In the Echinales I have taken the limits of Agassiz. I fol- 

 low Agassiz in considering the Medu sales as the true pas- 

 sage, connecting the Echinales with the Ascidiales. The 

 Bryozoa are admitted to pass by Vorticella to the Infusoria, 

 and are said on the other hand to pass into the Ascidiales ; 

 but in laying stress on the Vent, we must recollect, that the 

 Vent may gradually approach the Mouth, until the two open- 

 ings may coincide. 



The Families of Aviculales and Tridacnales are limited 

 from Dr. Flemming's Treatise on Mollusca. 



The Crustacea are limited principally from Milne Ed- 

 wards : — 



Gecarcinales are Oxyrhinques, Cyclometopes, Catome- 

 topes, Leucosiens-calappiens, and Qorystiens-dorypiens. 



Hippales are Dromiens, Raniniens, Hippiens, Paguriens- 

 homaliens-pactoliens, and Porcellaniens. 



PaLjEMOnales are Macroure cuirassees, Thalassiniens-as- 

 taciens, Salicoques ; Caridioides-bicuirassees, and Unicui- 

 rassees. Bopyridae-cymothoadae are his Cymothoadiens ; 

 Sphaeromadae-idoteadae-asellidae are his Idoteidiens ; Gam- 

 maridae-corophiadae are his Crevethiniens. 



The Families of the Cephalose-Molluscs are easily dis- 

 tinguishable ; their order of Succession and that of the Alli- 

 ances are open to remark. 



The Pisces are principally formed from the Groups of Cu- 

 vier. 



Vol. II.— No. 21. n. s. zz 



