REPTILES. 
Tribus— EUNOTES. Bihron. 
Familia— TROPIDURID^. Mihi. 
Tropidolepidiens. Bibr. 
Genus — Tropidurus. (In part.) Weigmann. 
Proctotretus. Bibr. 
Character Genericus. — Pori femorales nulli. Pori in maribus tantum. Crista dorsalis imWa,. 
Dentes palatini. Squama; imbricatce ; dorsales carinatsc. 
The genus which I take the present favourable opportunity to illustrate, formed 
a section or sub-genus of the genus Tropidurus, according to Weigmann, who, how- 
ever, was acquainted with two species only ; Pr. Chilensis‘dwA Pr. nigromaculatus. 
Of the varieties of the former of these, that author has made no less than three 
species ; but these have been very properly reduced by M. Bibron to one only. 
The last-named excellent erpetologist described several additional species, 
which had been brought from Chile, by M. D’Orbigny, and others ; and I received, 
some years since, from Capt. King, three or four species which were found 
by him in the same locality, in the course of his well-known survey. The number 
of species altogetlier, hitherto known, amounts to ten ; to which I have now the 
opportunity of adding four entirely new, forming part of the interesting collection 
of Reptilia made by Mr. Darwin. One of them, Pr. Kingii, was already in my 
collection, amongst those which were given me by Capt. King. The genus, 
therefore, of which, but lately, two species only were known, now consists of 
fourteen ; and it is highly probable that more may yet be obtained by more pro- 
longed and extensive investigation in the same districts. 
B 
