322 



INDEX. 



Hjosternal (Gi*. hyo, and sternon 



the breast bone), 128 

 Hypapophysis (Gr. hypo below, and 



apophysis springing from), 28 

 Hyperoodon (Gr. hyper above, and 



odous a tooth), dentition of the, 



259 

 Hyposternal (Gr. hypo under, and 



sternon the breast-bone), 128 

 Hypotympanic bone (Gr. hypo and 



tympanon under the drum), 45 

 Hyrax (Gr. hyrax the rock rabbit), 



dentition of the, 308 



I 



Ichthyosaurus (Gr. ichihus a fish, 

 and saura a lizard), vertebra) of 

 the, 98 



Iguana, osteology of the, 91, 93 



Iguanodon (Gr. iguana a saurian 

 reptile, and odous a tooth), den- 

 tition of the, 252 



Iliac bones (Lat. ilia the flanks), 130 



Incisor tooth, magnified section of 

 the, 230 



Incisors (Lat. incaedo to cut in), of 

 the carnivora, 264 



Intercondyloid tract (Lat. inter be- 

 tween, and Gr. kondylos a protu- 

 berance), 146 



Ischium (Gr. ischis the lumbar re- 

 g¥>n), 131 



Ivory, supplied from the discovered 

 tusks of the mammoth, 275 ; mus- 

 kct-balls often found in, 276 



Jacchus (Gr. iacho to cry aloud), 



dentition of the, 306 

 Jaws of fishes, modifications of the, 



53 : of the boa-constrictor, 83 



K 



Kangaroo, skeleton of the, 205 



Labroids (Gr. lahros voracious, and 



eidos appearance), dentine of the, 



247 

 Labyrinthodonts (Gr. lahyrinthos a 



labyrinth, and odous a tooth), a 



singular variety of extinct Batra- 



chians, 236; teeth of the, ib. 

 Lachrymals (Lat. lacrymsetenTs), 81 

 Lamelliform teeth of fishes (Lat. 



lamina a thin plate, and forma 



shape), 243 

 Lancelet-fish, skeletal framework of 



the, 25 

 Lemuridoe (Lat. lemtir a hobgoblin), 



teeth of the, 307 

 Lemurs, teeth of, 307 

 Lepidosiren (Gr. lepis a scale, and 



siren a water-nymph), osteoden- 



tine of the, 247 

 Lepidosteus (Gr. lepis and osteon 



bony-scaled), a fish of the Ohio, 



19 

 Leptobranchii (Gr. leptos slender, 



and branchos the throat), order y 



of the, 240 

 Limbs of animals, nature of, 183; 



of the protopterus, ib. ; of the 



sloth, 189, 192; of the batra- 



chians, 65 

 Lion, skeleton of the, 198-204 ; its 



jaws and teeth, 263, 264 

 Lithophytes (Gr. lithos a stone, and 



phuton a plant), the food of the 



Scari, 247 

 Lizards, osteology of, 91-95 ; dental 



system of, 253 

 Loggerhead, a species of turtle so 



called, 123 

 Lophioid fishes (Gr. lophos a crest 



or mane, and eidos resemblance), 



61 

 Lophius (Gr. lophos a crest), den- 

 tine of the, 247 ; plicidentine of 



the, 247 

 Lumbar vertebrte (Lat. lumbus the 



back), 100 

 Lunare (Lat. one of the carpal 



bones), 216 



