DEVELOPMENT OF THE SKULL IN THE BATRACHIA. 11 



Fourth genus. Hylarana. 



39. HijJarana malabarica, DuM. and Bib. sp. — Young, f inch long. India. 



40. Hylarana temporalis, Gthr. — Adult male, 2^ inches long. Ceylon. 

 Fifth genus. Rapjna. 



41. Rappia 1 sp. — Adult female, finch long. Lago.s. (Probably /i'. kujo- 



eusis, Gthr., see P. Z. S., 1868, pp. 478-4'JO, plate 40, fig. 2.) 



42. Rappia {Ilyperolius) hicolor, Gray, sp. — Adult female, | inch long. Dog-trap 



Road, Paramatta, Australia. (See " Batr. Sal.," p. 89 ; Dr. Gunther there 

 remarks that, "this species is very probably the type of a separate genus, but 

 the condition of this single specimen does not enable me to give the characters 

 with certainty." The fact of the case is, that the skull of this specimen is 

 extremely membranous, as much so as in that of Acris Pickerimjii (see 

 Plate 19, figs. 6-10, and Plate 30, figs. 1-5). The Rappia from Lagos had, 

 on the contrary, a highly ossified skull, with a well-covered roof (see Plate 28, 

 figs. 6-10). 



Second Family. " Hylodid^." 



(I make up this family of Professor Mivart's sub-famiUes Acridina and Hylodina.) 

 No bone in the manubrium ("omosternum"). Vertebree procoelian ; fontanelle very 

 open {Acriti), or covered {IIylode.-<). 



First genus. Hylodes. 



43. Hylodes martinicensis, Bib., sp. — Adult female, 1^ inch long. Martinique. 

 Second genus. Acris. 



44. Acris Pickeringii, Hole. — (A) Adult female, 10 lines long (f inch) ; and 



(B) larva, 1 inch 2 lines long ; tail, f inch ; hind legs, \ inch. Cambridge, 

 Mass., U.S. 



Second sub-division of Tree-froc/s. 



Family " Hylid.^." 



These have the sacral apophyses dilated ; and have no parotoids. The ear is 

 perfect, and, as a rule, tlie fontanelle is ojDen ; I find it covered in Hyla rubra, and 

 almost covered (by sculptured solid bones) in Nototrema. 



First genus. Hyla. 



45. Hyla Eivingii. DuM. and Bib. — Adult female, 1^ inch long. Van Diemen's 

 Land. 



46. H. p)hyllochroa, Gthr. (see P. Z. S., 1868, \). 481).— Adult female, 1 inch 5 Imes 

 long. Cape York, Austraha. 



c 2 



