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Show 1883.] MR. BOULENGER ON FROGS FROM NORTHERN PERU. 635 3. On a Collection of Frogs from Yurimaguas, Huallaga River, Northern Peru. By G. A. BOULENGER, F.Z.S. [Eeceived December 6, 1883.] (Plates LVII., LVIII.) An interesting collection of Erogs, made at the above locality by Dr. Hahnel, adds considerably to our fragmentary knowledge of the Batrachian fauna of North-eastern Peru. It contains examples of 18 species, 8 of which are new. Examples of the new and of some of the rarer known forms have been secured for the British Museum. The specimens having been deposited in very weak spirit and protected from the light, the coloration is wonderfully well preserved. 1. PROSTHERAPIS FEMORALIS, sp. n. (Plate LVII. fig. 1.) Snout depressed, projecting, truncate, with angular canthus rostralis and vertical loreal region ; nostril nearer the tip of the snout than the eye; interorbital space broader than the upper eyelid ; tympanum perfectly distinct, half the diameter of the eye. First finger longer than second ; toes with a slight rudiment of web ; disks of fingers and toes small ; subarticular tubercles small; two very small metatarsal tubercles. The hind limb being carried forward along the body, the tibio-tarsal articulation reaches the posterior border of the eye. Skin tubercular above. Blackish brown above, limbs lighter and marbled with darker; a narrow white line on each side of the body, extending on the outer border of the upper eyelid and the canthus rostralis to the end of the snout, where it is continuous with its fellow; a second parallel white line on the flanks; a third on the upper lip, from below the nostril, extending to the arm ; lower surface of arm and base of same, and. an oblique band on inner half of upper surface of femur, bright yellow ; throat and breast blackish brown ; abdomen and lower surface of hind limbs brown- and white-marbled. From snout to vent 27 millim. Two specimens, S $ - Closely allied to P. inguinalis, Cope; distinguished by the distinct tympanum and the coloration. 2. PHVLLODROMUS PULCHELLUS, Espada. 3. DENDROBATES RETICULATUS, sp. n. (Plate LVII. fig. 2.) Snout truncate, longer than the diameter of the eye ; loreal region vertical; interorbital space broader than the upper eyelid ; tympanum scarcely distinct, half the diameter of the eye. First finger not extending so far as second ; disks of fingers large, truncate, of toes smaller; subarticular tubercles feebly developed; two scarcely distinct metatarsal tubercles. The hind limb being carried forward along the body, the tarso-metatarsal articulation reaches a little beyond the tip of the snout. Skin smooth. Upper surface of head, back to sacrum, and a spot on the chin, pink ; the rest of the animal |