146 Proceedings of the Royal Society of Victoria. 



Habitat. — Table lands 50 miles to N.E. of Tennant's Creek, 

 Central Australia. 



We have named this fine species after Professor Baldwin 

 Spencer, F.R.S., who obtained fine specimens on the Spencer- 

 Gillen expedition, and who, during his travels in Central Aus- 

 tralia, has added so much to our knowledge of the fauna of those 

 little known regions. 



Type, in the National Museum, Melbourne. 



The specimen chosen for the type is the largest perfect 

 individual, although apparently not fully grown. Two other 

 imperfect specimens in the series under examination attain a 

 total length respectively of 81 cm. (tail reproduced) and a skin 

 110 cm. Tail, 52 cm. 



This species belongs very clearly to group III. B2 of Boulenger 

 in the British Museum Catalogue, viz., V. varius, V. giganteus, V. 

 gouldii. The members of the group are not differentiated by 

 very strongly marked characters. Tiie chief points of distinction 

 are the shape of the nostril and its position, and the number of 

 transverse rows of abdominal scales. The colour markings are 

 very variable, as is the number of well marked rows of abdominal 

 scales. 



The present species difFei's from all these in the comparative 

 shortness of the tail, in which character it agrees with V. brevi- 

 cauda, Boulenger. 



Diplodactylus bilineatus, sp. n. 



Description. — Head rather short, high, convex. Snout pointed, 

 scarcely longer than the distance between the eye and the ear 

 opening, latter small, vertically oval. Body moderate ; limbs 

 rather short. Digits rather long, moderately depressed with 

 rounded tubercles below ; apical dilations with two suboval 

 plates inferiorly. Upper surfaces covered with small granular 

 scales, largest on the middle of the back. Rostral large, not 

 twice as broad as high, with trace of median cleft above ; nostril 

 pierced between the I'ostral, first labial, and five or six nasals, 

 the supero-anterior large, and in contact with each other. 

 Seventeen upper labials, first very high ; fifteen lower labials, 

 anterior large. Mental large, subtriangular, rounded behind. 



