i6i 



I. Vomerine teeth present 9. Rhacophorus p. 242. 



II. No vomerine teeth , .... 10. Philaiitiis p. 268. 



C. Pupil vertical. No intercalary ossicle between the 



two distal phalanges. No vomerine teeth 11. Nyctixalus p. 277. 



I. Rana L. ') 



(LiNNE, Syst. Nat., ed. 10, 1758, p. 210). 



Pupil horizontal. Tongue notched and free behind. Vomerine 

 teeth present (rarely absent). Tympanum distinct or hidden. 

 Fingers free; toes usually webbed; tips of fingers and toes 

 simple or dilated, the disks without transverse groove. Outer 

 metatarsals usually separated by web. 



Omosternum and sternum with a bony style. No intercalary 

 ossicle between the penultimate and terminal phalanges; the 

 latter obtuse or T-shaped. 



Tadpoles. — Eyes superior, rarely lateral. Spiraculum 

 sinistral. Vent dextral, near the lower edge of the subcaudal 

 crest, rarely median. Upper crest of tail not extending beyond 

 the base of the tail. Mouth normal; sometimes a large sucking 

 disk behind it; papillae absent along the upper border of 

 the upper lip, rarely entirely absent; number of series of 

 teeth variable. 



Distribution: that of the family. 



Synopsis of the Subgenera. 



A. Tips of fingers and toes not dilated, or with dilatations 



devoid of horizontal groove a. Rana p. 167. 



B. Tips of toes, and usually also of fingers, with disks, 

 which have a crescentic or horseshoe-shaped horizontal 

 groove between upper and lower surface. 



I. Omosternum with forked base. 



1. Toes strongly webbed b. Discodeles p. 183. 



2. Toes free or slightly webbed c. Platy mantis p. 187. 



II. Omosternum entire d. Hylarana p. 193. 



i) Ra?ta mackloti Schlg. (Boulenger, Cat. Batr. Sal. Brit. Mus., 1882, p. 72) 

 has been omitted: the specimens of this species, preserved in the Museum at 

 Leiden and according to the label collected by S. Miiller in Java, evidently 

 are males of Rhacophorus burger I Schlg. from Japan ; probably there has been 

 made some error with the label, the species never being found again in Java. 



iNDO-AUSTRALIAN AMPHIBIA. II 



