RATKACHIA SALTENTIA. 109 



some black spots on the loin and on the hinder part of the 

 upper leg ; the disks appear to be rather larger, and there 

 is a very distinct web between the fingers. 



o, IT. Adult and half-grown. China. From Mr. Cuming's Collection. 

 p. Adult female. China. From Mr. Cuming's Collection. 

 s-x- Adult and half-grown. China. From Mr. Cuming's Collection. 

 \p. Adult : skeleton. China. From Mr. Cuming's Collection. 



II. Var. japonica. Spot on the loin and streak through the 

 eye Avanting. In Schlegel's description (Fauna Japon. 

 p. 11 2), another frog is confounded with this variety. Onl)'' 

 fig. 6 of the third plate in that work belongs to H. arhorea : 

 see Poli/pedates sMegelii. 



w, aa. Adult and half-grown. Japan. From the Leyden Museum. 

 hb. Adult. Japan. From the Leyden Museum*. 



30. Hyla euphorbiacea. (Plate X. fig. C.) 



Vomerine teeth between the nostrils. Fingers not webbed ; a shght 

 nidiment of a web between the first and second fingers ; toes one- 

 third webbed ; a fold across the chest ; tympanum one -third the size 

 of the eye ; tongue circular, hardly nicked behind. Above grejash 

 (in spirits greenish olive), with a grey streak from the nostril through 

 the eye, widening on the sides and reaching to the loin ; the liinder 

 sides of the thighs white-spotted. 



a. Adult male. Cordova. From M. Salle's Collection. 



h. Adult male. Cordilleras. From M. Parzudaki's Collection as 



H. pulcheUa. 

 c, d. Adult. Mexico. From M. Salle's Collection. 

 e. Adult : skeleton. Mexico. From M. Salle's Collection. 



I formerly considered this American species to be a climatal va- 

 riety of Hi/la arhorea ; but M. Salle, who collected the greater part 

 of the specimens, has afi'orded me such information, that I no longer 

 adhere to my former opiuion. The American species never fuUy 

 attains to the size of the European, the ground- coloiu- is always grey 

 or greyish, never green, and the voice is much less vigorous and dif- 

 ferent in intonation. M. Salle generally found it resting on the large 

 euphorbiaceous plants. From the great similarity of all the out- 

 ward characters to Hyla arhorea, and from the figure in Plate X., it 

 will not be necessary to give a full description. The toes appear to 

 be proportionally a little more slender. 



The results of a comparison of the skeletons of the Eiu-opean and 

 Chinese varieties of Hyla arhorea and of H. eupliorhiacea are, that 



* In the "Zoology" of the 'Voyage au Pole Sud et dans rOceanie sur les 

 Corvettes 1' Astrolabe et la Zelee,' Part " Eeptiles et Poissons, par Jacquinot et 

 Guichenot," another variety of Hyla viridis is described at p. 25, and figui-ed in 

 pi. 1. fig. 2, 2 A, with black, lighter-edged spots. The figure does not appear 

 to be very well executed, and the country where it was found is not mentioned. 



