LIST OF ILLUSTRATIONS. 



TEXT FIGURES. 



Paga 



Actaon tra-skii Steaius ^ 298 



Skull of Sciuropteriis sabrinus macroHs 353 



Ear of Sciuropteriis sabrinus (a) from Hudson Bay, and S. sabrinus viacrotis (b), 



tj'pe specimen 354 



Sknll of Sciuropterus sabrinus (a) from Great Slave Lake, and 5 sabrinus 



macrotis (b), type specimen 354 



Fore foot (a) and hind foot (b) of Sorex macriirus from the Catskill Mountains. 355 



Head of Sorex macriirus from the Catskill Mountains 355 



Tail of Sorex personatus (<i), S. fnmeus (b), and S. maerurus (c) 356 



Topaz crystals from Alabashka 362 



Topaz crystals froui Ilmen Mountains 363 



Topaz crystals from Nerchinsk 364 



Topaz crystal from Schneckenstein 364 



Topaz crystal from Japan 364 



Topaz crystals from Brazil 365 



Topaz crystal from Brazil 366 



Topaz crystals from Sau Luis Totosi, Mexico 366 



Topaz crystals from Pikes Peak, Colorado 367 



Topaz crystal from Pikes Peak, Colorado 368 



Topaz crystals from Utah 368 



Topaz crystal from Bald Face Mountain. New Hampshire 369 



Pseudothelphusa exilipes, female 514 



Psciidothelphusa ag rest is, male 515 



Pseudothelph usa belliana, male 516 



Pseudothelphusa montana, male 516 



Pseudothelphusa tnmimanns, male 517 



Pseudothelphusa nobilii, female 518 



Pscudothelp)husa bouvieri, female 519 



Pseudothelph usa agassi::ii, female -. 519 



Pseudothelph iisa fossor 520 



Pseudothelphusa dilatata, male 521 



Pseudothelphusa su Icifrons, male 522 



Pseudothelphusa (jarmani 523 



Pseudothelph usa maxillipes, male 525 



Pseudothelph usa con rexa, male 526 



Pseudothelphusa pittieri, male 527 



Pseudothelph usa peruviana, male 527 



Platypcecilus quitzeoensis, new species 540 



Claw on the thumb. Oreortyx 644 



Pterylosis of the crown, Lophortyx 645 



Pterylosie of the crown. Oreortyx 646 



Special neck tracts of Bonasa 649 



XI 



