1903.] ON NEW REPTILES FROM BRITISH NEW GUINEA. 125 



The discovery in New Guinea of a fish of the genus Rhiac- 

 ichthys Blgr. {Platyptera C. k, V.), a type of Gobiidse so 

 admirably adapted to life in mountain torrents, is a very in- 

 teresting addition to our knowledge. The tj^pe of the genus, 

 R. aspro, C. & V., which differs from R. novce-guioiece in the 

 larger eye situated much nearer to the gill-opening than to the 

 end of the snout, inhabits Bantam, Celebes, and Luzon *, whilst 

 a doubtful species, R. sinensis Blkr., is founded on a Chinese 

 drawing; described as " dubice excoGtitudinis." 



EXPLANATION OF PLATE XL 



BJiiacichthj/s novce-guinecB, with upper and lower views of head and anterior 

 part of body, reduced f nat. size. 



3. Descriptions o£ new Reptiles from British New Guinea. 

 By G. A. BouLENGEE, F.R.S., V.P.Z.S. 



[Received May 13, 1903.] 

 (Plates XII. & Xlll.t) 



Lygosoma milnense. (Plate XII. fig. 1.) 



Section Hinidia. Head large, especially in the male, body 

 short ; the distance between the end of the snout and the fore 

 limb is contained once to once and one third in the distance 

 between axilla and groin. Snout short, obtuse. Lower eyelid 

 scaly. Nostril pierced in a single nasal ; no supranasal ; a single 

 anterior loreal ; rostral forming a very long, curved suture with 

 the frontonasal, which is nearly twice as broad as long ; pree- 

 frontals forming a median suture ; frontal much narrowed pos- 

 teriorly, longer than frontoparietals and intei'pai-ietals together, 

 in contact with the three first supraoculars ; five supraoculars, 

 first longest; 10 or 11 supraciliaries, first largest; frontoparietals 

 and interparietal distinct, nearly equal in length ; parietals 

 forming a sutui-e behind the interparietal ; nuchals absent or 

 reduced to one pair ; third, fourth, and fifth labials below the 

 eye. Ear-opening oval, nearly as large as the eye-opening ; no 

 auricular lobules. Scales smooth, dorsals largest, 30 or 32 round 

 the middle of the body. Pra^anals slightly enlarged. The hind 

 limb reaches the shoulder, or between the shoulder and the ear. 

 Digits rather elongate, slightly compressed ; subdigital lamellae 

 smooth, 35 to 37 under the fourth toe. Tail once and a half to 

 once and two-thirds the length of head and body. Coloration 

 very variable. Upper parts uniform brown, or with a light, 

 dark-edged dorso-lateral streak joining its fellow on the base of 



* I have not been able to find on any map the locality "Wanderer Bay" given 

 by Giinther, Cat. Fish. iii. p. 138. 

 t For explanation of the Plates, see p. 129. 



