Genera Cornufer, Platy mantis, &c. 373 



of the latter, which agree with those of Discodeles (large 

 nasals in contact with the frontoparietals, omostemal Btyle 

 forked at the base) and differ from those of Amolops and 

 Stauroia (small nasals widely Beparated from each other and 

 from the frontoparietals, omosternal style not forked). 



Digital discs absolutely similar to those of Cornufer are 

 found in Staurois, Cope (type : Ixalua natotor, Grtlir.), and 

 in a frog from Kina Balu, North Borneo, described by me 

 thirty years ago under the name of Ixalua latopaltnatus, 

 whieh I now regard as the type of anew genus, Simomantia, 

 so named in allusion to the curious pug-like form of the 

 snout ; this frog agrees with the species grouped under Stauroia 

 in the very large digital discs, broader than long, supported 

 by T-shaped phalanges in whieh the horizontal limb is longer 

 than the longitudinal, in the absence of an intercalated bone 

 between the penultimate and distal phalanges, in the outer 

 metatarsals separated to the base by the very broad web of 

 the toes, in the absence of vomerine teelh, and in the osteo- 

 logical characters referred to above. In addition to the 

 structure of the digital discs, Simomantia is distinguished 

 from Buna, as it is also from Staurois, by the webbed fingers, 

 a character whieh had led me to refer S. latopalmata to the 

 vicinity of Ixalua bimaculatua, Peters, likewise from Borneo, 

 whieh is, however, a true Lva/us. 



Simomantia is confined to Borneo ; Cornufer is known 

 from Burma ( ('. tenasserimensis, Stoliczka, originally de- 

 scribed as a Band), Borneo (C '.baluensis, Blgr. = ifona aariba 

 Shelford), the Philippines (C.guentheri, Blgr., jagorii, Peters 

 worcesteri, Stejneg., corrugatus, A. Dum.), New Guinea 

 (C. unicolor, Tschudi), the Salomon Islands (C. quppyi, 

 Blgr.), and the Fiji Islands (C. dorsalis, A. Dum.', inter- 

 medius, F. Mull.) ; whilst Platymantia is represented in the 

 Philippines (P. corrugata, A. Dum., meyeri, Grtlir.), New 

 Guinea and neighbouring islands (P. corrugata, A. Dum. 

 punctata, Tetevs & Doria, beauforti, v. Karnp.), New Britain 

 (P. Ijoulengeri, Boettg.), the Solomon Islands (/\ aolomonia. 

 Blgr.), and the Fiji Islands (P. vitiana, A. Dum., unilineata. 

 Peters). 



Although the presence or absence of vomerine teeth is 

 generally regarded as of generic importance, it would be so 

 obvious a violation of the principles of natural classification 

 to separate geneiically Stauroia hainanensis, Blgr., from 

 Rana latopalmata, Blgr. (Amolops afghana, Cope), or Stauroia 

 natator, Gthr., from liana guttata, Gthr., on this ground, that 

 I have no hesitation in referring Staurois hainanensis to liana 

 in spite of the absence of vomerine teeth, and in modifying 

 the definition of the genus Staurois, founded on the absence 



