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Show • 1899.] BATRACHIANS OF THE MALAY PENINSULA AND SIAM. 893 end of the snout than the spiraculum, the distance between the eyes twice the distance between the nostrils, and about equal to the width of the mouth. Spiraculum on the left side, directed backwards and upwards, a little nearer the anus than the end of the snout, visible from above and from below. Anus opening on the right side. Tail from 3| to 4 times as long as deep ; acutely pointed; upper crest convex, a little deeper than the lower, not extending on to the back; depth of the muscular portion at its base about half the greatest total depth. Mouth. The large powerful beak is entirely black ; the uoper mandible terminates in front in a long sharp tooth-like prominence ; the lower mandible is bicuspid, each "tooth" being long and sharp. The lips are bordered with very short fleshy papillae : inside the upper lip are five series of fine, black teeth ; the 1st series is uninterrupted, the second slightly interrupted by the individual teeth being " grouped with intervals " about the centre of the line; the remaining series are broadly interrupted, the 5th being very short and difficult to distinguish : the lower lip has also five series of teeth; the 1st is short and uninterrupted, the second long and uninterrupted, the remainder broadly interrupted and very short. Colour (in life). Above'yellowish brown, mottled with darker brown, a very distinct dark brown crescent-shaped mark above each nostril. Below white, purplish grey about the chin and throat. Tail yellow, mottled with brown, an horizontal dark line along the median line of the basal third of the muscular portion. Iris golden. Size. Total length 52 mm.; length of body 18*5 ; width of body 12*5 ; length of tail 33*5 ; depth of tail 9. Habits. Those of ordinary Rana tadpoles. 10. RANA LIMNOCHARIS Boie. Rana gracilis, Blgr. Cat. Batr. Sal. p. 28. Localities Sf Habits. This species is very numerous in Bangkok, where I have observed it in the months of Jan., Feb., Mar., June, July, Aug., Oct., Nov., and Dec. Small specimens abound in the evening, hopping about the grass, they are very active. In the hot weather, in spite of the burnt up condition of the ground and grass, these frogs still appear at night, and, when one tries to catch them, take refuge down the sun-cracks in the parched earth. Specimens over 50 m m . snout to vent are of comparative rare occurrence. I have also found this species common along the Bangpakong river, at Chantaboon, Paknam Menam, in fields beyond Sapatoom, Ayuthia, Pakpreo, Dong Phya Fai (up to 900 feet elevation), in Siam; at Taiping, Kuala Kangsar, and Chumar in Perak, and at Alor Star and Jenan in Kedah. In a former paper (P. Z. S. 1896, p. 902) I wrote of this species P R O C ZOOL. Soc-1899, No. LVIII. 58 |