410 ME. G. A. BOULENGER ON ORIENTAL [Apr. 28, 



sacral diapophyses on tlie left side — the first on the ninth vertebra, 

 as normal, the second being part of the coccyx ; on the right 

 side the ninth vertebra has a slender diapophysis, as on that 

 preceding it, and the triangular process forms part of the 

 coccyx. 



I have alluded above to irregularities in the mode of arti- 

 culation of the vertebra?, which lose all systematic importance 

 from the fact that, in these lowly forms, the intervertebral 

 sphere of cartilage which is at first distinct from the so-called 

 centra, as they ossify, become attached either to the vertebra 

 anterior or posterior to each, if not remaining independent. We 

 may thus find, on the same vertebral column, proccelous, oj)istho- 

 ccelous, or amphicoelous vertebrae ; and it is now quite clear that 

 such a character is worthless in the Pelobatidae even as a specific 

 character. I may add that the same will probably be found to 

 be the case in the Hemiphractidpe. Brocchi has described the 

 vertebrae of Heiniphractus as opisthocoilous. I have not been 

 able to verify the statement, but I find them proccelous in a 

 skeleton of the closely-allied Ceratohyla bitbahis. 



Genus Megalophrys Kuhl. 



Pupil erect. Tongue circular or pyriform, entire or nicked 

 ■and free behind. Vomerine teeth in two small groups, if pre- 

 sent. Tympanum distinct or hidden under the skin. Fingers 

 free, toes free or shortly webbed; outer metatarsals united. 

 Sternum with a bony style. Coccyx, if distinct from the sacral 

 vertebra, with simple articulation. 



South-eastern Asia. 



Synopsis of the Species. 



I. Profile of snoiit obliquely truncate, strougly projecting beyond lower jawj 

 canthus rostralis angular and loreal region vertical or slightly oblique. 



A. Head at least once and a half as broad as long (to occiput) ; tihio-tarsal 



articulation not reaching eye ; vomerine teeth usuallj^ present ; tympanum 



hidden or feebly distinct. 

 End of snout without or with a mere indication of a 

 dermal appendage ; outer border of upper eyelid pro- 

 duced in the adult into a pointed appendage, which 

 does not, as a rule, measure more than half diameter 



of eye 1. M. montana Kuhl. 



Snout terminating in a pointed dermal appendage ; outer 

 border of upper eyelid produced into a pointed append- 

 age, which is at least f diameter of eye in the adult ... 2. 31. nasuta Schleg. 



B. Head not more than once and two-fifths as broad as long ; tympanum 



distinct. 



1. Tibio-tarsal articulation reaching beyond eye ; vomerine teeth present. 

 Upper eyelid with a horn-like tubercle ; tibia 1^ to 



If times in length from snout to vent ; toes with a 



slight rudiment of web 3. 31. longipes Blgr. 



Upper ej'elid without appendage ; tibia If to 2 times 



in length from snoi\t to vent ; toes i to ^ webbed 4. Jf. major Blgr. 



