258 ME. G. A. BOULENGER ON BATEACHIANS AND 



irregular transverse series on the back ; a dark brown blotch below and behind the 

 eye ; lips white, with a few dark brown spots; lower parts white. 



Total length 195 mm. 



Head 21 



Width of head 14 



Body 69 



Fore limb 24 



Hind limb 38 



Tail (reproduced) 105 



A single specimen from the Mimika R. (B. O. U. Exped.). 



The three species of the Section Parotosaurus, all three from New Guinea, are 

 easily distinguished as follows ; — 



Tympanum rather deeply sunk ; seven supraoculars ; three pairs of 



nuchals ; 40 smooth scales round body L. mimikanum, Blgr. 



Tympanum scarcely sunk; nine supraoculars; no nuchals; 50 smooth 



scales round body L. annedens, Blgr. 



Tympanum scarcely sunk; seven supraoculars; no nuchals; 36 scales 



round body, dorsals and laterals rough with granular asperities . . . L. granulatum, Blgr. 



22. Lygosoma smaragdinum Less. 

 Mimika R. (B. O. U. Exped.). 



23. Lygosoma longiceps Blgr. 



Launch Camp, Setekwa R. (Wollaston Exped.). 



24. Lygosoma semoni Oudemans. 



Launch Camp, Setekwa E. (Wollaston Exped.). 

 The lower parts may be of a lovely pink colour. 



25. Lygosoma fuscum D. & B. 



Mimika R. (B. O. U. Exped.). — Launch Camp and Canoe Camp, Setekwa R. 

 (Wollaston Exped.). 



Some of the specimens from the Mimika River belong to the typical form, others 

 from the same locality as well as most of those from the Setekwa R. may be referred to 

 the var. tricarinatwn (Heteroj>us tricarinatus Meyer, Sauvage). In these the dorsal 

 scales are strongly tricarinate, and the males have the throat and sides of the neck 

 blue, with black longitudinal lines. 



26. Lygosoma cyanueum Less. 



Mimika R. (B. O. U. Exped.). — Launch Camp, Setekwa R. (Wollaston Exped.). — 

 Observation Point and Camp III, Utakwa R., 2500-3000 ft. (Wollaston Exped.). 



