Hydrochœrus, N. American Post-Pliocene, i. 130

Hydrochœrus, ii. [241]

Hydrocissa, ii. [317]

Hydrocyon, ii. [445]

Hydrogale, ii. [199]

Hydromedusa, ii. [408]

Hydromys, ii. [230]

Hydrophasianus, ii. [355]

HYDROPHIDÆ, ii. [384]

Hydrophis, ii. [384]