INDEX. 



663 



Ickthyopterygia, 423: chaiacleia of. 445. 

 446. 



lohthyosauria, 445. 



Ichthyosaurus, 446, 448. 



Idothea, 226. 



Tgnana, 440, 451. 



Iguanidce, 440. 



lgug,nodon, 461. 



llyanthidas, 118. 



Ilyanthus, 118. 



Imago, 254. 



Imperforata (Foraminifera), 55, 66. 



Implacentalia (Marnimalia), 522. 



Individuality, geueral defiDition of, 27; 

 in Sponges, 69. 



Infundibulam, o^ Cephalopoda, 323. 



Infusoria, spontaneous generation of, 87, 

 3S ; characters of, 70 ; divisions of, 70 ; 

 affinities of, 77 ; Ciliated, 70; Suctorial, 

 75; Flagellate, 7i3; Compared with, 

 Rotifera, 1S3. 



Inia, 551. 



Innocua (Ophidia), 433. 



liwceramus, 306. . 



Inop&rculata, 316, 319. 



Insecta, 200 ; general charactera of, 248- 

 257; organs of the mouth of, 250; 

 ■\vings of, 249; digestive system of, 

 252 ; tracheae of, 253-; circulation of, 

 253 ; metamorphoses of, 254 ; partheno- 

 genesis of, 31-34; sexes of, 256 ; orders 

 of. 257-272: distribution, of, in time, 

 273. 



Insectivora, 522,526; general characters 

 of, 595; families cf, 596; distributioa 

 of, in time, 617. 



Insessoresy 474 ; characters of, 495 ; sec- 

 tions of, 49fi. 



Xntegro-pallialia, 303, 305, 306. 



Invertebrata, geaeral characters of, 346, 

 347. 



IschioduSy 397, 405. 



Isis, 121, 128. 



IsocardUi, 3u7. 



Isopoda, 208 ; characters of, 225; develop- 

 ment of, 225; distribution of, in time, 



m. 



lulus, 247. 

 Ixodes, 240. 

 Ixodidce, 210. 



Jaouar, 5S5. 



Jelly-nshea, urticating powers of. 100; 



nature of, 102; former classification of, 



100. 

 Jerboa, 590, 591. 

 Jumping Hare, 591. 

 Jumping Mouse, 591. 



Kan'oaroo, 529, 531, 53S, 

 Kangaroo-rat, 531, 533. 

 Kellia, 307. 

 Kei-atode, 64. 

 Kerdtosa (Sponges), 67. 

 King-crabs, 221, 228. 

 Kinknjon, 579. 

 Koninckia, 296. 

 KnurbckiadcVj 303. 



LxiiRi^'M. of Lohtitur, 206; oT A rachnida, 

 236 ; of Insecta, 250, 251, 252. 



Labrum, of Lobster, 206 ; of Trilobftes, 

 219 ; of Scorpion, 236 ; of insecta, 250. 



Labyrinthodontia, 417, 418. 



Laccrta, 439. 



Lacertidoe, 438. 



Lacertilia, 413, 423 ; general charactera 

 of, 435, 436; families of, 437^41; die- 

 tribution of, in time, 441. 



LcBmoelipoda, 208 ; characters of, 224. 



Lagena, 55. 



Lagomys, 5S8. 



Logopus, 489. 



Lamallibranchiata, 274, 276 ; general 

 charactera of, 300; shell of, Sui ; di- 

 gestive system of, 302; circulatory 

 system of, 303; mantle of, 302; bran- 

 eliise of, 303 ; reproduction of, 304 ; 

 muscles of, 304; habits of. 3(i5; divi- 

 sions of, 305; families of, 306-3 8; 

 distribution of, in time, 336. 



Lamellirostres, 478. 



Lamprey, 372, 378, 379, 380. 



Laraii-shells, 292. 



Lancelot, -348, 356, 358, 371, 373, 376; 

 anatomy of, 376, 377. 



Land-salamanders, 413. 



La7iiidce, 498, 



Loamedea, 93, 



Laornis, 507. 



LaridcB, 477. 



Lark, 497. 



Larva, of Echvnodermata, 148, 144; of 

 Echinoidea, 144; of Asteroidea, 151, 

 152 ; of Ophiwroidea, 154 ; of Crmoi- 

 (Zert, 155, 158; of Holothuroidea, 160; 

 of Tceniada, 168, 170, 171 ; of Trema- 

 toda, 172; of Nemertida, 174; of Acan- 

 thoeephala, 176; of Ichthyophthira,209 ; 

 of I{hizocephala,210 ; of Ci/rripedia, 211; 

 of LiTimlus, 222; of Macrura, 22S; of 

 Brachyura, 232 ; ot Myriapoda, 246; of 

 Insecta, 234, '265; ofTunicata, 290; of 

 Brachiopoda, 296 ; of Lamellibranchi- 

 ata, 304; of Gasteropoda, 311; of Am- 

 phibians, 406, 407, 415. 



Leech, 189, 190, 191. 



Lemui'idce, 601. 



Leopard, 585. 



Lepadidce, 207,211; characters of, 213 ; 

 distribution of, in time, 234. 



Lepas, 212. 



Lepidoganoidei, 391, 403. 



Lepidcptera, 256 ; mouth of, 251 ; char- 

 acters of, 266- 



Lepidosiren, 373, 374, 379 ; characters of, 

 400, 401. 



Lepidosteiis, 303, 389, 391. 



Lcpidota^ 408 (see Dipyio'C) 



Lepisma, 258. 



Leporidae, 588. 



Leptmna, 296. 



Leptidce, 240. 



Leptocardia, 376 (see Pharyjigobraj^ 

 chvC). 



Leprts, 5SS. 



Lenicea, 36, 209. 



/jibelhtlidce, 261. 



TAcherlcxihnia, 53. 



LiqUl, 226. 



Ligula, 251. 



Liinoeidoi, 319. 



