Lens vesicle, 276, 284, 294, 302, 309, 321, 332 “Leviathan” of Book of Job, 40 Liver, 154 development of, 304, 307, 312, 326 Lower jaw, 74 Lungs, 199, 200 capillaries of, 200 development of, 303, 304, 312, 331 Mandible, 74 Mandibular fold, 296, 301, 308, 317, 318 Manus, 84, 317, 318, 329 Mating season of alligator, 19 Maxillary process, 301, 308, 317, 318 Meatus venosus, 312 Meckel’s cartilage, 330 Medulla, 132 Medullary canal, 254, 255, 258, 259, 260, 262, 267, 268, 269, 270, 271, 272, 275, 282, 291 Medullary folds, 250, 251, 253, 254, 256, 258, 265, 266, 291 origin of, 336 Medullary groove, 236, 237, 238, 241, 242, 244, 245, 248, 250, 253, 255, 256, 263, 265, 313, 334, 336, 337 Medullary plate, 249 Melbourne, Fla., 27 Mesentery, development of, 299 Mesoderm, 234 Metanephros, 332 Miami, Fla., 27 Midbrain, 275, 276 Middle ear, 149 Mouth, 150 Muscles: abdominal, 112 ambiens, 118 anconæus, 104 atlanti-mastoideus, 96 capiti-sternalis, 96 caput coraco-scapulare, 105 caput humerale mediale, 106 caput humerale posticum, 105 caput humeri laterale, 105 caput scapulare laterale, 104 carpo-metacarpalis, 111 carpo-metacarpalis V., 111 carpo-phalangei, 109, 110 carpo-phalangeus, 111 carpo-phalangeus primus digiti V., 111 caudali-ilio-femoralis, 120 caudi-femoralis, 121 cerato-hyoideus, 93 cervicalis adscendens, 96 collo-capitis, 94 collo-occipitis, 96 collo-scapularis superficialis, 97 collo-squamosus, 95 collo-thoraci-suprascapularis profundus, 98 coraco-antebrachialis, 101 coraco-brachialis, 101 coraco-ceratoideus, 92 costo-coracoideus, 93, 99 costo-scapularis, 94 costo-vertebralis lateralis, 94 costo-vertebralis medialis, 94 deltoideus scapularis inferior, 103 diaphragmatic, 115 dorsalis scapulæ, 103 of dorsal neck region, 94 dorso-humeralis, 102 dorso-scapularis, 97 episterno-ceratoideus, 92 epistropheo-vertebralis, 95 extensor hallucis proprius, 129 extensor ilio-tibialis, 118 extensor longus digitorum, 125 of eyeball, 146 femoro-tibialis, 119 flexor digitorum brevis, 128 flexor longus digitorum, 127 flexor tibialis externus, 122 flexor tibialis internus, 122 of forearm, 107 gastrocnemius, 126 humero-antebrachialis inferior, 102 humero-carpi-radialis, 108 humero-carpi-ulnaris, 108 humero-metacarpalis, 108 humero-radialis, 106 humero-radialis brevis, 108 humero-radialis internus, 107 humero-radialis lateralis, 109 humero-radialis longus, 107 humero-radialis medialis, 109 humero-ulno-phalangei, 110 ilio-femoralis, 120 ilio-fibularis, 119 ilio-ischio-caudalis, 130 intercostales, 115 intermaxillaris, 91 interosseus cruris, 128 ischio-femoralis, 123 latus colli, 92