( 404 ) 



round white sjwts on the lower jiart of the sides. Tail nearly black, with live 

 broad whitish rings. Toes irregularly anmilated with whitish. 



Total length 



Distance of vent from snout 



Lengtli of tail ...... 



Distance of tympanum from snout . 

 Diameter of the eye .... 



Length of fore-limb .... 



„ third finger .... 



„ hind-limb .... 



„ third toe ..... 



-'. Phyllurus lichenosus sji. nov. 

 (Plate XII.) 



Closely allied to Phi/llanis platurtis, with which it agrees in the general form 

 of the head and body. The cliameter of the eye is considerably less than its distance 

 from the ear, and scarcely one-half of its distance from the end of the snout. Ear- 

 opening a narrow vertical slit. Nostril behind the rostral and supranasal, and above 

 the first labial. Rostral divided in the middle, very broad ; median lower labial 

 large, without post-mentals. Tliirteen upper and ten lower labials, without count- 

 ing some granules round the corner of the mouth. Upper parts covered with 

 minute granules, with larger conical tubercles which form about ten longitudinal 

 series ; the series on the border between the side and abdomen contains the most 

 slender and longest tubercles, all being soft and flexible. Lower parts with minute 

 flat granules, those in the pubic and ante-pubic regions being enlarged. No spine 

 above the eye. 



Tail as long as the trunk, greatly depressed, leaf-like, ending in an abruptly 

 attenuated and tapering portion ; its margins are deeply scallojjed. As to the 

 upperside, the middle muscular jiart is finely granular, and the lateral membranaceous 

 l)art provided with two series of strong conical tubercles ; the edges of the lobes are 

 beset with thin spines. The attenuated part of the tail is armed with four series 

 of strong conical tubercles. Lower ])arts of the tail nuiibrmly granular, like the 

 abdomen. 



Greyish, with symmetrical brown markings, confluent across the back, where 

 they form four broad cross-bands, the first occujjving the neck. 



Total length ll!U millimetres. 



Distance of snout from vent .... .s(j „ 



Diameter of eye ...... „ 



licngth of tail .50 „ 



„ atlcnuati'd portion of tail . . I!l „ 



Tlie integuments of the tail of this species are still more highly sjiecialised for 

 protective i)urposes than in Phi/Uiiriin iilntuniH, of which 1 have seen specimens 

 with intact tail, ajjparently not reproduced. In fact the likeness to its surroundings 

 <if this gecko, when lying flat against a lichen-grown bark of a tree or a rock, must be 

 perfect. In the collection of the Natural History Museum are three specimens 

 from the Challenger collection obtained in Queensland, one adiili and two yonng. 



