ii. 215
_Thinolestes_, N. American Tertiary, i. 133
_Thinornis_, ii. 356
_Thomomys_, ii. 233
_Thous_, ii. 197
_Thrasaëtus_, ii. 348
_Threnetes_, ii. 107
_Thripadectes_, ii. 103
_Thripophaga_, ii. 103
_Thryophilus_, ii. 263
_Thryothorus_, ii. 263
Thrushes, ii. 255
_Thyca_, ii. 471
_Thylacinus_, Australian Post-Tertiary, i. 157