ART. 25 CHINESE AMPHIBIANS AND EEPTILES STEJNEGEB 25 



the hind feet at once discloses that it belongs to an entirely different 

 group of the genus. 



About five closely allied forms have been described or recorded 

 from the surrounding regions, namely, R. feae^ yunnanensis, and 

 phrynoides from Yunnan, spinosa from southern China south of the 

 Yangtse, and tibefana from a locality in Tibet. Of these the descrip- 

 tion of the last mentioned species agrees in almost all particulars 

 Avith our specimen. It has a distinct tympanum which is about 0.6 

 the diameter of the eye; a tarsal fold; the tibio-tarsal articulation 

 reaches the anterior angle of eye; the tibia is 314 times as long as 

 broad, and about twice in length from snout to vent; first finger is 

 longer than second; tips of toes swollen into small disks; inner 

 metatarsal tubercles narrow, about 0.6 length of inner toe, no outer 

 metatarsal tubercle; canthus rostralis quite distinct; loreal region 

 concave; nostril nearer the eye than the end of the snout; distance 

 between nostrils greater than interorbital width which is less than 

 upper eyelid; heels overlapping; barely trace of a fold across the 

 head behind the eyes, but a strong glandular fold from the eye to 

 the shoulder. The upper parts in the type which is hitherto the 

 only museum specimen recorded of R. fihetana, are described as 

 " rough with granules and numerous round or oval warts tipped 

 with black homy spinules." The wartiness of the Mount Omei 

 specimen is apparently even more pronounced, for the skin of the 

 whole upper surface resembles that of R. ^nigulosa, being densely 

 granular with elongate narrow warts, 2 to 3 millimeters long, and 

 arranged in about 8 fairly regular series on the back. The warts 

 on the sides and upper surface of legs are shorter, but also arranged 

 more or less serially, giving the whole upper surface a very rough 

 appearance. 



With regard to the type locality as given by Boulenger, I have 

 failed to locate any Yin-tsin-wau or -wan in Tibet proper, nor a 

 Wassu State. There is a Yin-tsin at the extreme eastern end of 

 Szechwan in or near the Wu-shan range, but that is not likely to be 

 the locality intended. There is, however, indicated on some maps 

 an independent tribe (or state) Wasu or Wa-ssu in Central 

 Szechwan near which a locality Wenchwan. Under the circum- 

 stances I feel that my identification of the species does no violence 

 to the probable geographical distribution of this interesting frog, 

 especially as Szechwan apparently has encroached upon Tibet by 

 the absorption of the various independent kingdoms.^" 



A table of measurements of our specimen is appended for compari- 

 son with the dimensions given by Boulenger of the type, I have 

 tried as far as possible to conform to his directions for taking the 

 measurements. 



20 See Rockhill, Joiiin. Mongolia Tib^et, 1894, p. 370. 



