INDEX. 



609 



Diplostomum, 165. 



Dipnoi, 384; general characters of, 375-377. 



Dipodidce, 545. 



Diprotodon, 562. 



Diptera, 235 ; mouth of, 236 ; characters 



of, 246. 



Dipterus, 378. 

 Discina, 275, 277. 

 Discinidce, 275. 

 Discophora (Medusae), 78 ; characters of, 



95-99. 



Discophora(Leeche$), 181 (see Hirudinea). 

 Dissepiments, of Corals, 117. 

 Distal, 77. 

 Distoma. 165. 

 Distribution, geographical, 39 ; bathy- 



metrical, 39; geological, 39-41. 

 Dithyrocaris, 220. 

 Dodo, 456, 470. 

 Dog, 531, 538, 539. 

 Dog-fishes, 373. 

 Dolabfilla, 296. 

 Doliolum, 270. 



Dolphins, 472, 476, 483, 504, 505, 510. 

 Donax, 285. 

 Dorcatherium, 565. 

 Doridce, 292, 296. 

 Doris, 296. 

 Dormice, 545. 



Dorsal vessel, of Insects, 237. 

 Dorsibranchiata, 186 (see Errantia). 

 Draco, 412. 

 Dracunculus, 171. 

 Dreissena, 284. 

 Drornaius, 452. 

 Dromatherium, 561. 

 Dromedary, 521. 

 Dryopithecus, 568. 

 Duck, 440, 447. 



Duck-mole, 473, 474, 479, 489, 490. 

 Dugong, 472, 502, 503, 504. 



EAGLE, 465. 



Eederon, 109. 



Echidna, 479, 482, 483, 485, 489, 490. 



Echinococci, 164. 



Echinodermata, 135; general characters 

 of, 136-138; development of, 136; divi- 

 sions of, 138; distribution of, in space 

 and time, 155-158. 



Echinodon, 413. 



Echinoidea, 138; characters of, 138-143; 

 test of, 138 ; ambulacra! system of, 141 ; 

 digestive system of, 142; families of, 

 143; distribution of, in space, 155; in 

 time, 157. 



Echinorhynchus, 169. 



Echinozoa, 135 (see Annuloida). 



Echinus, 141, 142. 



Echiurus, 178. 

 -Ectocyst, 261. 



Ectoderm, 75, 109. 



Ectosarc, 47, 



Edaphod",'*, 372, 380. 



Edentata, 475, 482, 484, 486; general char- 

 acters of, 498; distribution of, in time, 563. 



Edriophthalinata, 211; characters and 

 divisions of, 211. 



Elasmobranchii, characters of, 370, 371 ; 

 division;! of, 371 ; position of, in the scale 

 of Fishes, 374 ; distribution of, in time, 

 377, 379. 



VOL. II. 



Elazmodus, 372, 380. 



Eledone, 311. 



Elephas, 528, 529, 566. 



Elysia, 296. 



Elysiadce, 292, 296. 



Elytra, of Aphrodite, 186; of Coleoptera, 



234, 251. 



Emarginula, 295. 

 Emeu, 452. 

 Emydidce, 401, 402. 

 Emys, 401. 

 Enaliosauria, 416. 

 Enallostega, 54. 

 Encephala (Mollitsca), 278, 286. 

 Encrinus, 156. 

 Enderon, 109. 

 Endocyst, 261, 262. 

 Endoderm, 75, 109. 

 Endopodite, 196. 

 Endosarc, 47. 

 Endostyle, 267. 

 Entoinostega, 54. 

 Entomostraca, 198; characters of, 204; 



divisions of, 204. 

 Entosolenia, 52. 

 Entozoa, 158. 

 Eozoon, 55, 56. 



Ephemeridce, 244. 



Ephyra, 102. 



Epidermis (of the shell of Mollusca), 257. 



Epimera, 194. 



Epipodite, 196. 



Epipodium, 287; of Pteropoda, 297 of 

 Cephalopoda, 300. 



Episterna, 194. 



Epistome, 263, 265. 



Epistylis, 70. 



Epizoa, 198 ; characters of, 198, 199. 



Equidce, 515. 



Equus, 515, 565. 



Erinaceidce, 550. 



Erinaceus, 551. 



Errantia, 181; characters of, 185; gem- 

 mation of, 187; development of, 187; 

 distribution of, in time, 188. 



Esocidce, 361. 



Eudendrium, 85. 



Eulima, 295. 



Eunice, 188. 



Eunidea, 188. 



Euomphalus, 295. 



Eupsammidce, 134. 



Euryale, 147. 



Eurypterida, 211; distribution of, in time, 

 220. 



Eurypterus, 220. 



Exopodite, 196. 



Extracrinus, 156. 



FACIAL Suture of Trilobites, 209. 



Falconidce, 466. 



Favositidce, 133, 



Favospongia, 64. 



Feathers (structure of), 24, 425. 



Feather-star, 136, 150. 



Felidce, 539, 567. 



Felis, 540, 568. 



Fenestella, 276. 



Ferce, 530. 



Fiber, 544. 



Field-bug, 243 



Filaria, 171. 



2Q 



