690 



INDEX. 



Cyprcea, 839. 



Cyprceidce, 335, 339. 



Cypridina, 234. 



Cyprina, 328. 



CyprinidcK (Mollusca), 327 ; (Fishes), 409. 



Cypris, 234. 



Cypselidce, 527. 



Cyrena, 328. 



Cyrtta, 316. 



Cyrtoceras, 356, 358, 361. 



Cyrtolites, 359. 



Cysticerci. 187, 188. 



Cystic Worms, 184, 186, 188. 



CystiphyllidiK, 151. 



Cystiphyllum, 14). 



Cystoidea, 157 ; general characters of, 



175 ; distribution of, in time, 182.. 

 Cy there. 234. 

 C'ytherea, 321, 328. 



Dacelo, 528. 



Uactylethraj 441. 



Z>acfyop(!ertt*,<.393. 



Dafila,, 576. 



Dakosaurus,- 471. 



Dama, 694. 



Daphnia, 237. 



])arwinian iTheory, 41. 



Dasypodidx, 565, 5ti7. 



Dasyprocta, 619. 



Dasypus, 567. 



Dasyurus, 564. 



DecapodA (Crustacea), 246 ; distribution 

 of, in time, 254 ; (Cephalopoda), 350, 

 351. 



Decollated shells, 297. 



Deer, 591, 593, 594, 



Deinosauria (see Dinosauria). 



Deinotherium t 6uO, 603, 646. 



Delphinidce, 577, 579. 



Delphinula, 340. 



Ddphinus, 578. 



Demodex, 260. 



Dendroccela, 192. 



Dendrograpsus, 121, 12 1. 



Dendrolagus, 560. 



Dendrophyllia, 132. 



Dendrostyles, 120. 



Dental formula, 546. 



DentaUdce, 336, 340. 



Dentalina, 62. 



Dentalium, 340; shell of, 333; position 

 of, 340. 



Dentirostres, 523, 525. 



Development, 35 ; Retrograde, 37 ; of 

 Gregarinidae, 61; of Foraminifera. 61 ; 

 of Hydra, 92 ; of Corynida, 97 ; of 

 Sertularida, IQI;ofCalyCophoridce, 105 ; 

 of Physophoridce, 108 ; of Medusidoe, 

 113; of Lucernarida, 116; of Actinidin, 

 1-29; of Pleurobrachia, 145; of Echino- 

 dermata, 155; of Echinoidea, 157; of 

 Asteroidea, 167; of Ophiuroidea, 169; 

 ofComatula, l75;ofHolothuroidea, 178; 

 of Toeniada, 185; of Trematoda, 190 ; 

 of Nemertida, 193 ; of J canthocephala, 

 394; of Trichina, 196; of the Guinea- 

 Worm, t'6. ; of Tubicolar Annelides, 211 ; 

 of Errant Annelides, 215 ; of Crustacea, 

 22') ; of Ichthyophthira. 227; of Rhizoce- 

 phala, 228; of Cirripedia, 229; of Cope- 

 poda, 235; of Ostracoda, 234; of Phyllo- 



poda, 237; ofTrilobita, 239 ; of Limulus, 

 241; of Isopoda, 244; of Amphipoda, 

 243; of Stomapoda, 245; of Macrura, 

 246 ; of ylnomwra, 249; of Brachyura, 

 251; of Myriapoda, 2d6 ; of Insecta, 

 273, e se^. ; ofPolyzoa, 305 ; of Tunicata, 

 310 ; of ttrachiopoda, 315 ; of Lamelli- 

 branchiat'i, 325; of Gasteropoda, 332; 

 of Amphibia, 431, e sew. 



Dextral shells, 297. 



Dibranchiata (Cephalopoda), 350 ; charac- 

 ters of, i6. ; divisions of. i6. ; distribution 

 of, in time, 361. 



Dicer as, 327. 



Dicoryne, 96. 



Dicotyles, 587, 649. 



Dicranograpsus, 124. 



Dictyonema, 12 1. 



Dicynodon, 474. 



Dicynodontia, 474. 



Didelphia, 551, 557. 



Didelphidie, 557, 5')3. 



Didelphys, 557, 563, 641 



Didunculus, 519. 



ZJi'dws, 518 



Didymograpsus, 124. 



Diffltiffia, 57. 



Digitigrada, 605, 610. 



Dimerasomala, 261. 



Dimorphodon, 477. 



Dimyaria, 326. 



Dinabolus, 317. 



Dinophis, 460. 



Dinornis, 535. 



Dinosauria, 477, 478. 



Diomedea, 504. 



Diphydce, 106. 



Diphyes, 106. 



Diphyllidia, 341. 



Diphyozooids, 106. 



Diplacanthus, 428. 



Diplodonta, 328. 



Diplograpsus, 122, 124. 



Diplostomum, 191. 



Dipnoi, 424, 428 ; general characters of. 

 424, e seg. 



Dipodidce, 621. 



Diprotodon, 642. 



Diptera, 271, 275 ; mouth of, 271 ; char- 

 acters of, 284. 



Dipterus, 428. 



-Dipws, 621. 



Discina. 317, 319. 



Discinidce, 315, 3l7. 



Discophora (Medusce), 90; cliaracters of, 

 111, eiseg. 



Discophora (Leeches^ see Hirudinea. 



Dissepiments of Corals, 134. 



Distal, 89. 



Distoma, 190, 191. 



Distribution, geographical. 43; bathy- 

 metrical, 16. ; geological, 44. 



Dithyrocaris, 253. 



Dodo, 518, 519, 536. 



Dog, 544, 613. 



Dog-fishes, 422. 



Dolabella, 341. 



Doliolum, 309. 



Dolphins, 538, 542, 549, 578, 644. 



Dorcatherium 614. 

 Doridce, 336, 3 11. 



