308 



Viscount d'ARCHiAC and M, de Verneuil 



animals, belonging to 326 genera, distributed into classes and in each system ac- 

 cording to the following table. It is necessary, however, to inform the reader, that 

 in the number of species given in the table there are not included, for want of de- 

 scription, or sufficiently accurate figures, Istj the species determined by M. Hce- 

 ninghaus and noticed in the French translation of Mr. De la Beche's Manuel ; 2nd, 

 those mentioned by M. Eichwald in his memoir on the Silurian System of Esthonia ; 

 3rd, those alluded to by M. Sandeberg de Weilburg, in a letter addressed to M. 

 Bronn, and inserted in the ' Neue Jahrbuch fur Mineralogie,' &c. We have also 

 not taken into consideration the distribution of fossil species in the older forma- 

 tions of the south of Ireland, as indicated by Mr. Weaver, because there appears 

 to be some uncertainty about the true geological position of several of these fossili- 

 ferous strata. Lastly, the beautiful work of M. de Koninck not having begun to 

 be published till after the completion of our table, we have been able to avail our- 

 selves of only a manuscript hst which he had the politeness to give us in April 1841 . 



RECAPITULATION OF THE FAUNA OF THE PALEOZOIC ROCKS. 









.S 



it 



_g 





2 a 





a-s 

 g ". 



05 t/3 



,a 







o 



u 



la 



p. 08 







-1 



So 



■5 <U 



S a 







a 





I^M 



rt 



<u 



•sg 



'^^ 



J3 



"So; 



Classes. 



ca 



§s 



s § 



^=2 



«l 



-^ 



si-^ 



fecg 



in 



si:3 





S 







^ 2 



-= s 



^ s 



X: 



^2 



Xl "^ 







la 



3 s 



y a 



a ? 



a a 



s-e 



a d 



a e 



a-y 





<u 



-^ n- 



=* -3 



s 



3 <u 



3 



3 c3 



s 



3 a 







O 



H!W 



^OJ 



■^ a 



;z;R 



z a 



^;o 



z a 



?; a 



Z-6 



Pisces* 



31 

 46 



4. 

 20 



78 



216 



4 



448 



8 

 135 



82 



"7 

 10 



50 

 32 



199 



2 



6 



20 



24 



4 



168 



"2 

 "2 



"2 



36 

 22 



Crustacea 



Insecta 



MoUusca, Ord. Cephalopoda... 



Ord. Heteropoda ... 



2 



64 



15 



6 



22 



3 



36 



1 



2 



5 



Orrf. Pteropoda 



1 



11 



6 



1 



4 



*.. 



2 



■ •• 



■ > • 



. . ■ 



Ord. Gasteropoda . . . 



46 



382 



63 



7 



116 



16 



225 



5 



... 



10 



Conchifera, Ord. Brachiopoda.. 



15 



568 



230 



30 



182 



28 



229 



7 



3 



12 



Ord. Monomyaria.. 



9 



161 



33 



3 



60 



5 



77 





... 



... 





38 



4 



34 



indet. 



65 



302 



11 



163 



260 



49 



4 



42 



115 



9 



1 



S6 



145 



5 



59 



indet. 



107 



5 



10 



4 



126 



2 



75 



indet. 



83 





9 



2 



"3 



2 



Annelida 



'3 

 



Radiata 



Foraminifera 



Polyparia 



Infusoria 



indet. 

 11 



"30 



"25 



"3 



"3 





indet. 

 1 



... 





5 



Incertae Sedis 



Totals 



326 



2698 



807 



113 



984 



79 



1072 



22t 



15 



97t 



O 



* The numbers that we have given for the genera and species in this class will be augmented when the discoveries made 

 by Dr. Malcolmson in Scotland, Mr. Asmus in Livonia, Courland, &c., shall Have been published. 



+ The species in this column may probably at some future time be united to those of the next, since it may be supposed that 

 they might have lived during the Devonian period, in the beds of which future researches will not faU to discover them. 



J The greater number of species in this column are from North America. 



§ In the above recapitulation of Palaeozoic species we necessarily depend in many instances upon the names and descrip- 

 tions of foreign authors. Not having had it in our power to compare all the original forms, we conceive that, though by the 

 deduction of several names which we have ascertained to have been applied to the same shell in distant countries, the numerical 

 aggregate may be diminished for the present, yet the amount will doubtless be more than sustained by future discoveries. 



