374 



INDEX. 



DUFOUR, his work, 116, n. 2 

 DUGES, his works, 111, n. 1; 188, n. 1 

 DUJARDIN, his works, 45, n. 1; 104, 



n.; 121, n. 1 

 DUMAS, his paper with Prevost, 12,5, 



n. 3; his work, 185, n. 1 

 DUMERIL (A. M. C.), his work, 45, 



n. 2; 64, n.; 307, n. 2 

 DFMORTIER, his papers, 108, n. 1; 



110, n. 1 



DUTROCHET, his work, 125, n. 



DUVERNOY, his paper, 1 22, n. 1 



Duration of life, 133-135 



Early attempts to classify animals, 

 300-302 



Earliest types of animals, 31-36 



Ech inoderms, their standing, 40; their 

 geological succession, 149 ; their 

 development and geological succes- 

 sion, 170; their structural grada- 

 tion, 180; their characteristics, 222 ; 

 not to be considered as a primary 

 division of the animal kingdom, 

 287; a class of Radiata, 294; cte- 

 nophoroid characters of the young 

 Echinoderms, 294 



Echinoids, their standing and succes- 

 sion, 162 



ECKER, his paper, 104, n. 



EDWARDS (F. E.), his works, 142, 

 n. 4 



EDWARDS (H. Milne), his works, 44, 

 n. 1; 44, n. 3; 45, n. 1; 109, n.; 



111, n. 1; 115, n. 1; 117, n. 2; 118, 

 n. 3; 119, n. 1; 139, n. 1; 169, n. 

 1 ; his classification, 330 



EGEKTON (Sir Ph.), his paper, 145, 

 n. 1 



Eggs in all animals, 101; classifica- 

 tion based upon eggs, 210, n. 1; by 

 Vogt, 365 



Egyptian monuments, 82 



EHRENBERG, his works, 16, n. 1; 108, 

 n. 3; 136, n. 3; 145, n. 1; 285, n. 

 1; his classification, 319 



Elephant) the young compared to 

 Mastodon, 174 



Embryological systems, 350-369 



Embryology, its bearing upon classi- 

 fication, 4, 99, 126 



Embryonic types, 174 



EMMERICH, his work, 145, n. 1 



Enaima, correspond to Vertebrata, 

 208 



Entomostraca, 118 



Epicotyledones or EpiviteUians, a pri- 

 mary division of the animal king- 

 dom, 361 



Epizoa, as a class, 328 



ERDL, his paper, 119, n. 2 



ESCHER VON DER LiNTH, his paper 

 with Hier, 145, n. 1 



ESCHRICHT, his work, 109, n. 



ESCHSCHOLTZ, his work, 44, n. 1 



FALCONER, his work, 145, n. 1 



FABRE, his paper, 120, n. 1 



Families, 6, 236-247 



Family analogies, 276; family iden- 

 tity, 22 



Faunae, 48 



FAVRE (A.), his paper, 145, n. 1 



FENISSAC, his work, 44, n. 3 



FILIPPI (FiL. DE), his paper, 117, n. 

 2; 122, n. 1 



(TnEO. DE), his papers, 116, 



n. 1 

 Fishes, their standing, 40, 122; the 



fishes proper form a distinct class 



of Vertebrata, 299 

 FITZINGER, his works, 45, n. 2; 234; 



his classification, 340 

 Flesh-animals, 208 

 Florae, 48 

 FORBES (Eo.), his works, 103, n.; 103, 



n. 3; 128, n. 1; 145, n. 1 

 FORCHHAMMER, his work, 122, n. 1 

 Form, different meanings of the term, 



236 ; characterizes the families of 



animals, 236 

 FRANTZIUS, his paper, 104, n.; 108, 



n. 1; 116, n. 2 

 FREMY, his paper with VALENCIENNES, 



102, n. 



Fresh water animals, 73 

 FREY, his works, 37, n. 2; with Leuck- 



art, 104, n. 

 Fundamental relations of animals, 



1-14 



FUNK, his work, 124, n. 2 

 Ganoids, a distinct class of Vertebrata, 



299 



Ganglioneura, 208 

 Gasteropoda, their standing, 40 

 GEGENBAFER, his works, 44, n. 1 ; 103, 



n. 3; 110, n. 1; 118, n. 3 

 GEINITZ, his work, 142, n. 4 

 Genera, 6,247-249; views of Aristotle, 



301 



General remarks upon modern sys- 

 tems, 285-300 



