OCR Text |
Show 1 897.] REPTILES AND BATRACHIANS OP CELEBES. 199 ## Dorsal scales smooth or unicarinate. I" 38-50 scales round the middle of the body; no enlarged scale on the heel. j No supranasal; dorsal scales keeled. Dorsal and lateral scales strongly keeled 21. Lygosoma, tropidonotus. Dorsal scales feebly keeled, laterals smooth 22. Lygosoma nigrilabre. \\ No supranasal; dorsal scales smooth. 7 or 8 supraoculars; 44-46 scales round the middle of the body. 23. Lygosoma sarasinorum. 6 supraoculars; 38-40 scales round the middle of the body. 24. Lygosoma variegatum. \\\ Supranasal present; dorsal scales smooth. 25. Lygosoma celebense. tt 20-26 scales round the middle of the body ; an enlarged scale on the heel 26. Lygosoma smaragdinum. (3. Lower eyelid with a transparent disk. # Limbs not overlapping when adpressed; no supranasal. 22 scales round the middle of the body 27. Lygosoma inconspicuum. 30 scales round the middle of the body 28. Lygosoma textum. ## Limbs overlapping when adpressed ; supranasal present. 24-26 scales round the middle of the body 29. Lygosoma cyanurum. 36-40 scales round the middle of the body 30. Lygosoma atrocostatum. ### Limbs not overlapping when adpressed; supranasal present. 31. Lygosoma bowringii. b. Tympanum distinct, more or less sunk ; fourth toe not longer than third. Frontonasal usually in contact with frontal; ear-opening large. 32. Lygosoma temminckii. Praefrontals forming a median suture ; ear-opening small. 33. Lygosoma parvum. c. Tympanum covered with scales 34. Lygosoma infralineolatum. d. Tympanum exposed and superficial; dorsal scales very strongly keeled and ending in a sharp point. 35. Tropidophorus grayi. 2. Limbs absent ($) or hind pair rudimentary and flap-like (<$). 36. Bibamus novm-guinem. IV. SNAKES. A. Eyes under the head-shields. Praeocular in contact with the labials ; 20 scales round the body. 37. Typhlops braminus. Praeocular separated from the labials by a small shield; 18 scales round the body 38. Typhlops ater. B. Eyes exposed ; all the teeth solid. 1. Tail prehensile ; ventral and subcaudal shields present; pupil vertical. a. Upper surface of head with shields ; anterior upper labials pitted ; scales smooth. Four upper labials pitted 39. Python reticulatus. Two upper labials pitted 40. Python molurus. |