discoglossid^:. 129 



Genus LATONIA, Meyer 1 . 



Skull with sculptured ossifications, and the parieto-frontal bones 

 completely ossified [as in Ceratojphrys]. Bibs with short, posteriorly 

 directed processes : urostyle articulating with sacrum by two 

 condyles. 



This genus was regarded by its founder as closely allied to Cerat- 

 ophrys, the vertebrae being described as procoelous 2 . Cope 3 , how- 

 ever, pointed out that it should be referred to the present family, 

 the transverse processes to the urostyle and the expanded sacral 

 processes being distinctly shown in Meyer's figure of the type. 

 The second vertebra in advance of the sacrum in this figure seems 

 to be distinctly opisthocoelous ; and vertebras of this type are found 

 in association with the Sansan species. 



Latonia seyfriedi, Meyer 4 . 

 Syn. Latonia (Ceratophrys) seyfriedi, Meyer 5 . 



The type species. Of the approximate dimensions of Leptodac- 

 tylus pentadactylus . 



Hob. Europe (Switzerland). 



42737. Slab showing the ventral aspect of the imperfect skeleton ; 

 from the Upper Miocene of (Eningen, Switzerland. This 

 specimen is considerably smaller than the type skeleton 

 figured by Meyer in his ' Fauna der Yorwelt — Saugethiere 

 etc. aus dem Molasse,' pi. iv., and may therefore indicate 

 a male individual. The character of the vertebrae cannot 

 be determined. Van Breda Collection. Purchased, 1871. 



Latonia gigantea, Lartet 6 . 



Syn. Rana gigantea, Lartet 7 . 

 Rana rugosa, Lartet 8 . 

 Latonia rugosa, Cope 9 . 



Very imperfectly known, and therefore only provisionally sepa- 

 rated from the type species. There is every probability that Rana 

 rugosa was founded upon small (? male) individuals of this species ; 



1 Neues Jahrb. 1843, p. 5S0. 



2 Meyer, Fauna der Vorwelt — Saugetb. etc. aus dem Molasse, p. 19 (1845). 



3 Fat. Hist. Eev. ser. 2, vol. v. p. 105 (1865), and Journ. Ac. Nat. Sci. 

 Philad. ser. 2, vol. vi. p. 75 (1867). 



4 Neues Jahrb. 1843, p. 580. 5 Log. tit. 

 6 Notice de la Colline du Sansan, p. 41 (1851). — Rana. 7 Loc. tit. 



8 Loc. cit. Preoccupied by Schlegel, 'Fauna Japonica- — Kept.' pi. iii. fig, 

 (1838). 



9 Nat. Hist. Kev. ser. 2, vol. v. p. 105 (1865). 



PART IV. K 



