524 The Philippine Journal of Science 1923 



first, second, and third toes; an elongate inner metatarsal 

 tubercle, followed by a small fold on heel; a well-defined skin 

 flap on outer side of fifth toe; no outer tubercle; tibiotarsal 

 articulation reaches tip of snout. 



Color in life. — Above mottled gray to gray-brown with in- 

 distinct dark markings; a broad cream-yellow line runs from 

 snout to anus, the edges not sharply defined, and more or less 

 mottled and marked with darker; markings on lips very indis- 

 tinct; tympanum brown; throat dirty gray- white, belly, under 

 thigh, and groin canary to lemon yellow; limbs very dimly 

 barred with darker. 



Measurements of type of Rana acanthi sp. nov. 



Upper eyelid ° 



Interorbital distance 6 



Length of head 31 



Width of head 29 



Forelimb 41 



Hind limb 114 



Tibia 38 



Femur 36 



Longest toe to end of metatarsal tubercle 35 



Variation. — There is at hand a good series of young and half- 

 grown specimens from northern Palawan and Busuanga. The 

 characters recorded for the type are evident in most of them. 

 The broad stripe on the back is absent in only one of the larger 

 specimens, but is wanting in several of the smaller specimens. 

 The development of the two teeth in the anterior part of the 

 lower jaw depends upon age and sex, being largest in the older 

 males. Two of the specimens are almost uniform gray-brown 

 above, with the cream-yellow stripe and a light area above the 

 arm and below the posterior part of the eye; the bars on the 

 leg are more strongly marked than in the type. 



Remarks. — This belongs to the Rana macrodon group of frogs, 

 characterized by the enlarged teeth in the lower jaw, the skin 

 flap on the outer toe, and the absence of the outer metatarsal 

 tubercle. The Philippine forms, R. magna Stejneger, R. wood- 

 worthi sp. nov., and the present species differ from R. macrodon 

 in having vocal sacs. R. acanthi sp. nov. differs from the two 

 Philippine species in the presence of the broad medial stripe 



