52 Christmas Island. 



This small Gecho, of which a single male specimen was obtained 

 by ;Mr. Lister, is closely allied to G. pumihis, Blgr., from Papua 

 (Port Moresby and Torres Straits), from which it is at once- 

 distinguished by its nearly free toes. 



Family SClXCIDiE. 

 3. Lygosoma atrocostatum, Less. 



Lygosonifi ntrocostatinn, Bouleiif^er, Cat. Liz., iii, p. 295 (1887). 



Mr. Andrews has brought home two specimens of this species, 

 which is widely distributed, being known from the Philippines, 

 Celebes, the Moluccas, I^ew Guinea, Cape York, the Caroline and 

 Santa Cruz Islands. I may also add to its known habitat Pulo 

 Tikos, Penang, where it was found by Mr. S. S. Flower, and 

 whence it had been described by Stoliczka under the name of 

 Mahowja jerdoniana. 



Lives among rocks on beach at Flying Fish Cove. 



4. Lygosoma nativitatis. (PL YII, Fig. 2.) 



LygoHoma nativitatis, Boiilenger, P.Z.S., 1887, p. 516, and 1888, p. 536. 



Section Emoa. Habit lacertiform ; the distance between the end 

 of the snout and the fore limb is contained once and one -third to 

 once and a half in the distance between axilla and groin. Snout 

 long, obtuse. Lower eyelid with an undivided transparent disk. 

 Nostril pierced between a nasal, a postnasal, and a supranasal ; 

 frontonasal broader than long, forming a suture with the rostral 

 and with the frontal ; latter shield nearly as long as the fronto- 

 parietal, in contact with the first and second supraoculars ; four- 

 supraoculars ; seven or eight supraciliaries ; frontoparietals united 

 into a single large shield ; a small interparietal, behind which the 

 parietals form a si;ture ; a pair of nuchals and a pair of temporals 

 border the parietals; four or five labials anterior to tlie large 

 subocular. Ear-opening oval, a little larger than the transparent 

 palpebral disk, with three or four very small lobules on its anterior 

 border. Thirty to thirty-four scales round the middle of the body, 

 all smooth in the adult, quinquecarinate in the young, laterals 

 a little smaller than dorsals and vcntrals. No enlarged prceanals. 

 The hind limb reaches the elbow. Digits moderately elongate, 

 a little flattened at the base, compressed at the end; subdigital 

 lamellae smooth, thirty-one to thirty-four under the fourth toe. 

 Tail two - thirds of the total length. Brown above, strongly 

 iridescent, with small golden and blackish spots, most numerous 

 on the sides and limbs ; lower surfaces white. 



Head... ... ... ... 15 mm. 



Width of head 9-5 „ 



Body 56 ,, 



Fore limb 22 ,, 



Hind limb ... ... ... 31 ,, 



