2^4 



The Numerical Relations of Animals. 



Number of Genera. 



Neuroptera, 



Hymenoptera, 



Lepidoptera, 



Diptera, 



Myriopoda, 



Thysanura, 



Parasita, 



Suctoria^, 



Rhipiptera, 



10 



Latreille. 



27 

 207 



87 

 268 



8 



4 



9 



1 



2 



[ 



Fabricius. 



12 

 83 

 15 

 81 

 2 



KNTHBLMINTHA. 



Linnseus, 

 Zeder^ 

 Rudolphi *, 



Year. 



1767 

 1803 

 1819 



Linnaeus, 

 Blainville t 



Linnaeus, 

 Eschscholtz :|:, 



11. RADIARIA OR ECHINODEBMATA. 

 1769 



12. MEDUSA. 



1830 



1767 

 1829 



LinnseuSj 

 Blainville, 



Linnaeus, 

 Ehrenberg §, 



13. ZOOPHYTA OR POLYPI ||. 



1767 



1830 



14. ROTATORIA. 



1767 

 1832 



15. INFUSORIA. POLYGASTRICA. 



Linnaeus, 1767 



Ehrenberg, 1832 



Linnapu* 



7 

 10 



3 

 10 



2 



No. of species. 

 15 

 390 

 1100 



46 

 280 



11 

 208 



134 

 536 



8 



291 



8 

 291 



The total number of known living species of animals thus 

 appears to be : 



• Sjmopsis Entozoorum; Berolini, 1819. 8vo. At present, probably 

 the number of known species of Vermes may amount to 1500. 



-j- Diet, des Sciences Naturelles, torn. Ix. 



X Sytem der Acalephen. Berlin. 



II The Actiniae and Spongiae are included imder this head. 



§ Zur Erkentniss der Organisation im kleinsten raum. Berlin. 



