374 On the Genera Cornufer, Platymantis, cfcc. 



of these teeth, so as to include Rana guttata, in which they 

 are present though feebly developed. I have formerly even 

 gone so far as to regard the last as specifically identical 

 with Stazirois natator ; now, with a larger material for study, 

 I find it advisable to distinguish them and also to recognize 

 the species described by Mocquard as Ixalus nubilus. 

 Rana larutensis, Blgr., shows the same digital structure as 

 the last-named species, and is therefore removed from Rana 

 and referred to the same genus. 



Five species constitute the genus Staurois as now defined, 

 agreeing in the small tympanum; in the very large discs of 

 the fingers, broader than long and larger than those o£ the 

 toes, with a half-disc within the disc on the lower surface ; 

 in the very full web of the toes, involving the base of the 

 discs; and in the outer metatarsals separated to the base. 

 They may be distinguished as fullows : — 



I. Head as long as broad, much depressed ; no papilla in the middle of 

 the tongue ; vomerine teeth in small groups just behind level of 

 choante ; tibio-tarsal articulation reaching tip of snout or beyond ; 

 tibia 4 to 4^ times as long as broad. S. larutensis, Blgr. (Malay 



Peninsula and Borne.)). 



TI. Head longer than broad, moderately depressed. 



A. No papilla in the middle of the tongue ; tibio-tarsal articulation 



reaching tip of snout or beyond ; tibia 5 to 7 times as long as 

 broad ; skin of upper parts coarsely granulate. 

 Vomerine teeth in small groups between 



the choanoe S. guttatus, Gthr. (Borneo). 



No vomerine teeth S. natator, Gthr. (Philip- 

 pines). 



B. A conical or rounded large papilla in the middle of the anterior 



third of the tongue ; no vomerine teeth. 

 Tibio-tarsal articulation reaching tip of 



snout or beyond ; tibia 5 to 6 times as 



long as broad ; skin of upper parts [wan). 



coarsely granulate S. nubilus, Mocquard (Pala- 



Tibio-tarsal articulation reaching between 



eye and nostril ; tibia 4 to 4£ times a8 



long as broad ; skin of upper parts [(Borneo). 



feebly granulate S. tuberilinyuis, sp. n. 



The eggs, which measure 1^ mm. in diameter, are strongly 

 pigmented, dark brown over the greater part of the surface, 

 in 8. guttatus, feebly pigmented, pale brown, in 8. nubilus, 

 unpigmented in 8. natator; they are also unpigrnented, but 

 larger (2 mm.), in S. larutansis. 



I append a description of the new species; — 



Staurois tuber ilinguis. 

 Vomerine teeth absent. A large conical papilla in the 



