20 Barbow — New Lizards and New Toad from Dutch East Indies. 



other. Tail covered with small quadrangular keeled scales above and on 

 the sides, with larger, more heavily keeled ones inferiorly. Caudal crest 

 high on the male, with denticulated border; the crested portion of the tail 

 being contained three and one-third times in the length of the tail ; which 

 is two and two-thirds times as long ;l s head and body. Olive above, 

 spotted and vermiculated with black. Fold in front of shoulder black. 



Hydrosaurus weberi sp. nov. 



Type. — Museum of Comparative Zoology No. 7505; collected atWeeda, 

 Ilalmahera, February, 1907, by T. Barbour. 



Paratype.— M. C. Z. No. 7506, taken at same time and place. 



Type an adult male, paratype an adult female. 



Head deep and massive. Snout rather short, with a prominent, up- 

 raised area covered with greatly enlarged keeled scales instead of a longi- 

 tudinal crest between the nostrils; tympanum small, its vertical diameter 

 being contained almost three times in the distance from the anterior 

 border of the eye to the posterior limit of the nostril, which is round 

 instead of oval as in H. amboinensis. Upper head scales extremely small, 

 strongly keeled, not conspicuously enlarged in the frontal area as com- 

 pared to the region between the eyes; gular scales very small, granular; 

 row of enlarged shields on each side parallel with the lower labials, com- 

 mencing from the mental, and extending to a point below the anterior 

 third of the eye. Dorsal and nuchal crests interrupted in the shoulder 

 region; nuchal crest composed of short, thick, compressed spines; dorsal 

 and sacral crests with uniform, elongate, recurved spines, these being 

 most developed in the mid-dorsal region. Dorsal scales small, imbricate, 

 keeled, the keels directed upwards and backwards, along each side seven 

 groups, each composed of two or three very large, roundish, plate-like 

 scales, shortly keeled; these are not so regularly distributed in the female 

 (paratype). Limbs rather long, the adpressed hind-limb reaching the 

 tympanum. Five or six series of enlarged and strongly keeled scales on 

 the anterior face of the fore-limb; these rows are surrounded by very 

 many partially complete series of scales almost as greatly enlarged, 

 making a strong armor over the whole anterior face of the limb as against 

 the three rows seen on H. amboinensis. Femoral pores 11' on one side, i'.\ 

 on the other. Tail as in //. amboinensis, the crested portion being con- 

 tained three and two-thirds times in the entire length of the tail; which 

 is not quite twice as long as head and body. Color uniform dark brown, 

 lower surface more yellowish. 



This species may thus be distinguished at once from the type of the 

 genus by its massive, bull-dog head, covered above with almost uniform 

 minute scales; its small tympanum; and its entirely different nuchal ami 

 dorsal crest, its shorter tail and by the greater number of lateral enlarged 

 scales. 



This species is named in honor of Professor Max Weber, of Amsterdam, 

 to whom we owe so much for his studies of East Indian zoogeography. 



H. pitstulosus, from the Philippines, has the crest between the nostrils 



