800 EEPTILIA. 



fine point which tends to curl. Giinther^ records that in a Penang specimen in 

 which the tail had been reproduced, this member terminated in a dilated flap, and 

 StoHczka^ mentions an apparently similar case. 



Inches. 



Adult male, length of body 2'00 



„ taU 2-20 



These specimens fully verify Stohczka's observation that the ungual phalanx 

 of the thumb is distinctly present in a rudimentary form, and that the ungual pha- 

 lanx of the inner toe, so far from being absent, is provided with a very minute claw, 

 even in the adults. Stoliczka, however, was unable to detect its presence in some old 

 specimens. The existence of the ungual phalanges in both of these toes removes 

 any necessity for separating this Hzard generically from Semiclactylus, as the mere 

 absence of a claw on the thumb, considering the rudimentary nature of this struc- 

 ture in some Semiclactyli, cannot well be regarded as of structural importance. The 

 circumstance, however, that the other species S. meyeri is also devoid of a claw on the 

 thumb, would seem to indicate that these two forms may with advantage be grouped 

 under the sub-generic term Peripia, more especially as they are also distinguished by a 

 fold of skin along the back of the thigh, and between the thigh and lower leg.^ The 

 genus Spathodactylus'^ has still more rudimentary thumbs and first toes, and the 

 plates are less developed than in Semidactylus and its sub-division Perijna, but the 

 characters which separate SpatJwclactylus from Peripia do not appear to be more 

 than sub-generic. The toes of S. (P.) midilatits are distinctly webbed at the base, 

 and Cope remarks that P. paclmrdii agrees with Gixnther's description of P.peronii^ 

 except that the former has all the toes strongly palmate at the base. P. packardii, 

 was obtained at Penang, and is apparently identical with this sj)ecies. 



Hemedacttlus maculatus, D. & Bibr. 



Hemidadylm maculatus, D. & Bibr., Erp^t. Genl., vol. iii, 1836, p. 368 {pars!) ; Gray, Cat. 



Lizards, B. M. (pars.), p. 153, 1845 ; Dumeril, Cat. Method. Kept., 1852, p. 39 (jMrs.) ; Kelaart, 



Fauna Zeylanica, (nee, II. St/kesii), 1852, vol. i, p. 158; Jerdon, Journ. As. Soc, Bencral. 



vol. xxii, 1853, p. 467; Giintber, Kept., Brit. India, 1864, p. 107 {pars.) ; Theobald, Journ. 



Linn. Soc., 1868, vol. x, p. 32; Stoliczka, Journ. As. See., Bengal, vol. xxxix, 1870, p. 164; 



id. op. cit, vol. xli, 1872, p. 94; Blanford, op. cit., vol. xxxix, 1870, p. 361 ; Zool. Persia, 



1876, p. 342 ; Peters, Von Der Decken's Reisen, vol. iii, pt. 1, 1869, p. 14; Anderson, Proc. 



Zool. Soc., 1871, p. 160 ; Ferguson, Rept., Fauna, Ceylon, p. 11. 1877. 

 Nulilia argentii, Gray, Cat. Lizards, B. M., 1845, p. 273. 

 GecJco tytleri, Tytler, Journ. As. Soc., Bengal, vol. xxxiii, 1864, p. 547. 

 Hemidactijlus fasciatnS; Theobald, Journ. As. Soc, Bengal, vol. xxxvii, 1868, p. 30. 



The two OecJcos which I refer to this species were obtained at Tsagain in Upper 

 Burma. The sides and upper surface of the body, nape, sides of neck, upper surface 



'1. c. 



= 1. c, p. 163. 



3 Stoliczka, observing that some of the posterior plates on the toes are only angularly bent and not divided, even 

 went so far as to hold that the species included under Peripia should, strictly speaking, form only a section of the 

 genus GecJeo. 



" Gunther, Proc. Zool. Soc, 1872, p. 594. 



