264 DR. MALCOLM SMITH ON 



series is uninterrupted, the second slightly interrupted by the indi- 

 vidual teeth being ' grouped with intervals ' about the centre of the 

 line ; the remaining series are broadly interrupted." In nearly all the 

 specimens which 1 have examined the second series is also uninter- 

 rupted, and I believe the normal dental formula for the upper lip to be 

 2:3 + 3 and not 1:4 + 4. Where I have seen the second row inter- 

 rupted in the manner apparently referred to by Flower, it has been due 

 to erosion of the teeth at that point, a not unlikely thing to happen in 

 a creature of such active habits. 



The tadpole may attain a size considerably larger than he men- 

 tions, and specimens of 65-70 mm. in total length, with a head and 

 bodj' of 25, are not uncommon. 



I have obtained them throughout the rainj' season between July 

 and October, from pools and ponds where the water is usually fairly 

 deep. They are predacious, and like their parents, that will readily 

 devour other frogs, feed for choice, at anj' rate in captivity, upon other 

 tadpoles. A reall}' hungr}' individual will bolt its victim whole, but 

 the more usual method is to seize its prey by the belly, catching it 

 from below, and then to suck out the abdominal contents, after which 

 the body is dropped. In this way a well grown tadpole will dispose 

 of ten to fifteen others, the size of Microhyla ornata, in the course 

 of a daj'. 



Rana cancrivora Gravenh. 



Rfimi tiqrina, var. nnffustapalmata, van Kampen, Webers Zoolog. 



Ergeb'n., Bd. IV, p'. .S89 ( 1907). 

 /ion,, tigrina, id.. Natuurk. Tijdsoli. Nod.-Irul. LXIX, p. 3.3 (1000). 

 llnna cancrironi, Annand.ilp, Mem Asint. See. Beiig.il. VI, p. 128 

 (1917). 

 To Dr. Annandale belongs the credit for having at last assigned 

 this frog its true place in scientific literature ; and it was a great pleasure 

 to me to obtain the larvae so soon after the publication of his article, and 

 to compare them with Van Kampen's description of Java specimens. 



Mine were collected near the mouth of Chumpon River (Pen. 

 Siam), where this frog was very common, and from Koh Lak, a little 

 further north, at the end of June. Some of them, with their tails 

 still incompletely absorbed, liad just left the water, and it is from these 

 that the diagnosis has been made. 



JOURN. NAT, HI.ST. SOC, SUM. 



