554 
Physeter macrocephalus,historyof the knowledge of,309. 
, humerus of, 357. 
—— ——,, hyoid bones of, 325. 
—— ——, known specimens of, 311-314. 
—— ——, measurements of skulls of, 321-323. 
—— ——,, metacarpals of, 362-364. 
— —, nares of, 317. 
, nasal bones of, 318. 
—— — , orbits of, 319. 
—— —, osteology of the, 309-369. 
, pectoral limb of, 356-364. 
, pelvis of, 364-366. 
—— ——,, petrotympanie of, 321. 
—— ——,, pisiform bone of, 360. 
, radius of, 358. 
—— —, ribs of, 351-354. 
, scapula of, 356. 
—— —, sternum of, 354-356. 
—— — , teeth of, 320, 324. 
, ulna of, 358. 
, vertebral column of, 326-350. 
—— —, vertebral formula of, 348. 
—— microps, 369. 
—— (Huphysetes) simus, 30-48. 
, comparison of skull of, 41, 42. 
, description and measurements of, 
172-174. 
, external characters of, 30-32. 
, fins of, 43. 
—— —— — , frontals of, 37. 
—— —— ——,, interior of cranium of, 40, 
, lower jaw of, 40, 
—— —— ——, malars of, 39. 
—— —— — , maxillaries of, 38. 
—— —— ——,, nasals of, 37. 
—— —— — ,, occipital of, 34. 
——_ —— —, palatines of, 37. 
, pelvic bones of, 43. 
—— —— — ,, pterygoids of, 38. 
—— —— —, ribs of, 43. 
, Seapula of, 43, 
, Skull of, 34. 
, Sphenoids of, 35, 36. 
, Squamosals of, 39. 
—_—_ ——. ——,, ulna of, 43. 
—— —— —, vertebre of, 42, 43. 
——,, vomer of, 37. 
—— tursio, 369. 
INDEX OF SPECIES. 
Physeteride, 30, 32, 33, 93, 108, 118, 114, 116, 
366, 368. 
Physeterine, 114, 115, 368. 
Pimelepterus boscti, 386. 
Pimelodus cinerascens, 384, 474. 
godmanni, 393, 404. 
—— guatemalensis, 393, 403. 
—— managquensis, 393, 474. 
—— micropterus, 393. 
—— modestus, 384, 393, 405. 
—— motaguensis, 393, 404. 
—— nicaraquensis, 393, 405. 
petenensis, 393, 404. 
polycaulus, 393, 404. 
salvini, 393, 404. 
—— wagneri, 384, 393, 405, 474. 
Platalea, 72,76. 
Platanista, 44, 87, 89, 92, 94, 96, 98, 100, 102-104, 
112; 315. 
——., atlas of, 330. 
——-, cervical vertebrae of, 328, 330, 333. 
gengetica, vertebral formula of, 349. 
Platanistide, 113, 115. 
Platanistine, 114, 115. 
Platyglossus bivittatus, 390. 
dispilus, 390, 447. 
Plecostomus, 393, 405. 
bicirrhosus, 477. 
Plectognathi, 396. 
Plectropoma afrum, 385, 411. 
— chloropterum, 411. 
-— monacanthus, 411. 
multiguttatum, 411, 
Pleuronectide, 392. 
| Plotus, 512. 
Plovers, 72, 75, 79. 
Podargus humeralis, 74, 
Podiceps, 76, 520. 
Peecilia chisoyensis, 395, 40A. 
—— dovii, 395, 403, 405. 
elongata, 395, 406, 484. 
—— gillii, 395, 406, 485. 
mexicana, 395, 403. 
petenensis, 395, 404, 484. 
—— spilurus, 395. 
thermalis, 395, 403. 
Polynemide, 387. 
Polynemus approximans, 383, 387, 423. 
