28. PEKOCHIRTJS. ' 155 



2. PerocMrus guentheri. (Plate XII, fig. 4.) 



Head moderately depressed ; snout obtusely conical, longer than 

 the distance between the eye and the ear-opening, once and two 

 thirds the diameter of the orbit ; forehead concave ; ear-opening 

 small, oval, oblique. Body moderately elongate, depressed. Limbs 

 rather short, stout, depressed ; digits short, with a rudiment of web, 

 all but the rudimentary thumbs strongly dilated ; the free phalanges 

 of the fourth toe measuring the diameter of the eye. Head covered 

 with small granules, larger on the snout ; rostral subquadrangular; 

 with median cleft above, nearly twice as broad as high ; nostril 

 pierced between the rostral, the first labial, and three small nasals ; 

 ten upper and eight or nine lower labials ; mental small, narrow, 

 transverse ; three or four rows of small hexagonal chin-shields, 

 passing gradually into the minute granules of the throat. Upper 

 surface of body and limbs covered with very small granules ; abdo- 

 minal scales very small, Male with ten femoral pores forming a 

 short angular series. Tail very much depressed, as broad as the 

 body, flat beneath, with sharpish lateral edges ; latter denticulated 

 when the organ is intact ; the upper surface covered with small 

 juxtaposed scales, considerably larger than the granules of the back ; 

 the lower surface covered with larger, flat, slightly imbricated scales ; 

 the tail, when intact, is divided in rather distinct segments, each 

 line of separation being indicated on the lateral edge by a large, 

 pointed scale. Brown above, whitish beneath. ' 



Total length 120 millim. 



Head 12 „ 



Width of head 9 „ 



Body 57 „ 



JFore limb 22 „ 



Hind limb 26 „ 



Tail 51 „ 



New Hebrides. 

 C'-b. 6 ? . Erromango, 



This species is evidently very closely alhed to P. ateles, from which 

 it appears to differ in having the interdigital membrane shorter, the 

 rostral broader than high, the mental trapezoid, and probably also 

 in other characters when the types can be compared. 



3. PerocMrus depressus. 



Hemidactylus ateles, var. depressus, Fischei', Arch. f. Nat. 1882, 

 p. 300, pi. xvii. figs. 31-30 *, 



Differs from P. guentheri by the more depressed head and body, 

 the still smaller abdominal scales, and the presence of four prseanal 

 pores only. Erom snout to vent 80 millim. 



Iluk Island, Carolines. 



* Type (a cT ) examined. 



