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Show 442 MR. G. A. BOULENGER ON THE [May 8, 23. ARTHROLEPTIS INGUINALIS, sp. n. (Plate XXVII. fig. 2.) Tongue without conical papilla. Head moderate, as long as broad; snout rounded ; canthus rostralis obtuse ; loreal region concave ; interorbital space as broad as the upper eyelid; tympanum distinct, three-fifths to two-thirds the diameter of the eye. Fingers and toes rather elongate, slender, the tips merely swollen; subarticular tubercles very prominent; first finger not extending beyond second; toes practically free, the rudiment of web being very indistinct; a rather large, very prominent, oval, compressed inner metatarsal tubercle ; no outer metatarsal tubercle ; no tarsal tubercle. The tibio-tarsal articulation reaches the eye or between the eye and the end of the snout. Skin smooth. Coloration very variable : greyish or brownish above, uniform or spotted or freckled with darker, or with dark symmetrical markings ; a black canthal and temporal streak; a more or less distinct dark spot or short oblique band on the groin ; limbs with dark spots or bars ; lower parts white, throat usually freckled with brown. Male with an internal vocal sac From snout to vent 30 millim. Numerous specimens from the Benito Biver (67. L. Bates). GAMPSOSTEONYX, g. n. Pupil vertical. Tongue free and feebly notched behind. Vomerine teeth. Tympanum distinct. Fingers and toes free, the tips slightly swollen; terminal phalange of all but the inner toe a sharp curved claw, projecting through a slit on the lower surface of the extremity of the toe. Outer metatarsals bound together. Omosternum and sternum with a bony style. The projecting, non-retractile bony claw, uncovered with a horny sheath, which arms the toes with the exception of the hallux, is a feature unique, so far, not only among Batrachians but among Vertebrates. The only other instance I know of bone being exposed through the skin in Vertebrates higher than Fishes is to be fouud in tbe ends of the ribs of 31olge (Pleurodeles) waltlii Mich. and Tglototriton andersonii Blgr. 24. GAMPSOSTEONYX BATESI, sp. n. (Plate XXIX.) Vomerine teeth in two small round groups between the choanae. Head large, much broader than long ; snout broadly rounded, with short canthi and very oblique, slightly concave lores; nostril equally distant from the eye and the end of the snout; eye large ; interorbital space as broad as the upper eyelid; tympanum very distinct, oval, little smaller than the eye. First finger longer than second, nearly as long as third ; subarticular tubercles of fingers and toes feeble ; a small, oval, inner metatarsal tubercle. The tibio-tarsal articulation reaches the eye. Skin smooth and shiny; a glandular fold above the tympanum. Dark purplish brown above, white beneath ; a black canthal and temporal streak; a black transverse line between the eyes; two dark bars on the upper lip, |
