OCR Text |
Show 30 MR. G. A. BOULENGER ON SOME SPECIES [Feb. 5, from Sikkim), measuring up to 68 millim. from snout to vent, and in a single Formosan, 60 millim. long, the skin is perfectly free from the skull, which shows no trace of rugosities, and the width of the interorbital space equals or a little exceeds the width of the upper eyelid. The skull of Chinese specimens, up to 48 millim., resembles that of the Himalayan, whilst larger specimens, up to 70 millim., are intermediate between the latter and the Burmese- Malayan, both as regards the width of the interorbital space and the rugosities, the skin adhering to the fronto-parietals, but not to the nasals. In all the other specimens (Rangoon, Tenasserim, Siam, Camboja, Cochinchina, Singapore, Sumatra, Nias, Borneo, Java, Philippines, Celebes) the skin adheres to the fronto-parietals in individuals only 40 millim. long; and in the adult the interorbital space becomes very broad and concave, once and a half to twice the width of the upper eyelid, strong angular postorbital processes are developed, and the skin adheres not only to the fronto-parietals but also to the nasals and squamosals, as may be seen at a1' in the figure (p. 28). Here follow some measurements, in millimetres, of the skulls of specimens from various localities :- Length of skull Width of skull.. Width of fronto-parietals in front Width of fronto-parietals at postorbital processes... Darjeeling. 19 21 2- S. China. 23 24 9 10 ?• Rangoon. 20 21# 8-1 »1 ?* Manado. 24 27 10 15 2- 8iam. 25 28 11 19 Disk of third finger one half to three fifths the diameter of the eye. In some specimens the tibio-tarsal articulation reaches the eye, in others the end of the snout, in most between these two points. This species presents the well-known colour-variety characterized by longitudinal dark bands on the head and body (var. sexvirgata s. quadrilineata). But, as already noticed by Anderson on an Assamese specimen, the passage between this variety and the typical form exists; we have such intermediate specimens from Darjeeling and from Formosa. In spotted examples, a small X- or hourglass-shaped dark marking, extending to between the eyes, is frequently present. The hinder side of the thighs is usually brown, with small whitish spots ; but these may be absent, as usually in B. cruciger, or they may be large and separated by a dark network, as usually in R. maculatus ; these variations do not correspond with anv other that I can find. Hab. Southern China and Eastern Himalayas to the Malay Peninsula and Archipelago. RHACOPHORUS MACULATUS. Hgla maculata, Gray, 111. Ind. Zool. i. pi. lxxxii. ti*.*;. 1 (1832). |