91. Cystignathus peronii, Dumeril and Bibron Erp. Gen. 8 409. Inhabits New Holland ? Peron. 92. Cystignathus dorsalis, Gray Annals of Natural History 1841. Inhabits Western Australia. 93. Crinia georgiana, Tschudi, 2 78. Cystignathus georgianus, Dumeril and Bibron Erp. Gen. 8 416. Inhabits Australia, King George's Sound. 94. Heleioporus albopunctatus, tab. 1 f. 2 Gray Annals of Natural History 1841. Inhabits Western Australia. Family HYLIDAE. 95. Litoria freycinetii, Dumeril and Bibron Erp. Gen. 8 504 t. 88 f. 2. Inhabits New Holland, Port Jackson. 90. Hyla peronii, Dumeril and Bibron Erp. Gen. 8 569. Dendrohyas peronii, Tschudi, 75. Inhabits New Holland, Peron. 97. Hyla coerulea. Hyla cyanea, Daud. Schlegel. Dum. Blue Frog, White Journal Appendix 248. Rana australasiae, Schneider. R. coerulea, Shaw Gen. Zool. 3 113. Daud. Mer. Calamites cyanea, Fitz. Tschudi. Calamites coerulea, Wagler. Inhabits New Holland, New Guinea, Timor. 98. Hyla jervisiensis, Dumeril and Bibron Erp. Gen. 8 580. Inhabits New Holland, Jervis Bay. 99. Hyla lesueurii, Dumeril and Bibron Erp. Gen. 8 595. H. oculata, Peron manuscript. Inhabits New Holland, Port Jackson. 100. Hyla ewingii, Dumeril and Bibron Erp. Gen. 8 597. Inhabits Van Diemen's Land. 101. Hyla citropa, Peron and Lesueur. Dumeril and Bibron Erp. Gen. 8 600. Dendrohyas citropa, Tschudi, 75. Inhabits New Holland, Port Jackson. 102. Hyla aurea. Rana aurea, Lesson Voyage Coq. t. 7 f. 2. Hyla jacksoniensis, Dumeril and Bibron Erp. Gen. 8 602. Ranoidea jacksoniensis, Tschudi. Inhabits New Holland, Port Jackson. 103. Hyla adelaidensis, t. 8 f. 2. Gray Annals of Natural History 1841. Inhabits Western Australia. 104. Hyla bioculata, t. 8 f. 1. Gray Annals of Natural History 1841. Inhabits Western Australia. 105. Uperoleja marmorata, Gray Annals of Natural History 1841. Inhabits Western Australia. Family BUFONIDAE. 106. Phreniscus australis, Dumeril and Bibron Erp. Gen. 8 725. Bombinator australis, Gray Proceedings of the Zoological Society. Inhabits New Holland. 107. Breviceps gouldii; Gray Annals of Natural History 1841. Breviceps heliogabali, Gray, tab. 1 f. 1. Inhabits Western Australia. I have been induced to add to the foregoing list the following observations on the more obscure and hitherto unknown genera and species. RONIA, Gray. Head rather shelving, shielded with one transverse frontal and two large vertebral plates, the hinder largest; the rostral plates large, with two unequal superciliary plates. The nasal plate triangular, interposed between the rostral plate and the frontal ones, with the nostrils in its centre; loreal plates two, square; labial plates large; ears none, only a very indistinct sunk dot in their place. Body cylindrical; tail conical, tapering. Scales smooth, ovate, imbricate, those of the belly 6-sided. The front limbs very small, rudimentary, undivided; the hinder limbs moderately developed, ending in two very unequal toes, with distinct claws.