146 MR. G. A. BOULENGER ON REPTILES AND [Feb. 15, 



2. On a Collection of Eeptiles and Batrachians made by 

 Mr. H. Pryer in the Loo Choo Islands. By G. A. 



BoULENGER, F.Z.S. 



[Received Januarj 28, 1887.] 



(Plates XVII. & XVIII.) 



Our Corresponding Member Mr. H. Pryer has presented to the 

 British Museum an important series of Reptiles and Batrachians, 

 formed by him during a recent visit to the Loo Choo Islands. This 

 being the first herpetological collection from that group of islands that 

 has reached Europe, its interest in exceptionally great. The North- 

 Pacific Exploring Expedition, under Capt. J. Rogers, U.S.N., visited 

 the Loo Choo Islands in 1854-55, and a collection of Reptiles was 

 made, upon which Hallowell reported (Proc. Acad. Philad. I860, 

 p. 490 et seq.). Unfortunateh', owing to the imperfection of his 

 descriptions, little more than a score of new names was gained 

 by that author's contribution. Now that actual specimens are 

 at hand, identification of most of Hallowell's specimens has become 

 possible ; and it is my pleasant duty to furnish diagnoses of those 

 species together with a list of the others collected by Mr. Pryer, 

 among which are two entirely new. 



REPTILIA. 

 Lacertilia. 



1. Gecko japonicus, D. & B. 



1 Hemidactylvs marmoratus. Hallow. I. c. p. 491. 

 1 Hemidactylus inornatus. Hallow. /. c. p. 492. 



2. Ptychozoon homalocephalum, Crev. 



The unique specimen in the collection, a male, though in other 

 respects agreeing with the ludo-Malayan specimens, is remarkable 

 for having only eight prseanal pores. 



3. Japalura polygonata. Hallow. (Plate XVII. fig. 1.) 



Diploderma pohjgonatum. Hallow. I. c. p. 490. 



As was to be expected, this species is closely allied to J. swinhonis, 

 Gthr. It differs in having the tibia constantly shorter than the skull, 

 fewer labials as a rule, and in coloration. The number of upper and 

 of lower labials is six or seven, very rarely eight. The hind limb, 

 stretched forwards, reaches between the commissure of the mouth 

 and the anterior border of the orbit. Adult yellowish green above, 

 the interspaces between the scales black ; throat and nuchal crest of 

 males bright yellow ; females with broad black cross bands on the 

 back ; tail, in both sexes, annulate with black ; young more greyish, 

 with black cross bands on the back. 



