EEPTILIA. 
11 
This species of JBlirynocephalus is very closely allied to the Persian P. maculatm^ and 
probably to the true P. caudivolvulus, Pallas nee Gunther. It appears to he a much larger 
form than the latter. Prom the former it is distinguished by its limbs, when adult, being 
shorter, the fore limb, as a rule, not reaching the thigh, whereas it always reaches or even 
exceeds it in P. maculatus. The fifth toe of the hind foot in P. maculatus is longer; the 
fringe on the outer edge of the fourth toe less developed, and there is scarcely any fringe on 
the inside of the toe. Put the most important distinctions are in colouration. P. maculatus^ 
of which I have collected many living examples, never has a red spot behind the shoulder, 
and it always has a black tip to the tail, below at all events. The colouration of the tail in 
Thrymcephali is, as a rule, very constant. 
P. axillaris is said by Dr. Stoliczka to be very active, to run at a great pace, and to 
have the habit of coiling its tail upwards at the end. It, doubtless, inhabits open plains, like 
its Persian ally. 
Prom the above, it would almost appear as if I had proposed a new species on characters 
of no more importance than those which I have just before shown to be insufficient in the 
case of P. forsytlii. But in the present case the characters appear constant, probably 
because the two forms P. axillaris and P. maculatus inhabit distant and isolated areas, 
whilst in the case of P. forsytlii and P. tlieohaldi there is great variation, and no constant 
distinction can be detected even in colouration; moreover, so far as my experience of the 
genus goes, I should say that the red patch behind the axil in P. axillaris and the black 
tail tip in P. maculatus are more important than the back markings which distinguish 
P. forsytlii. When P. maculatus exhibits bright colours, as it very often does, they are 
confined to the lower surface of the tail and hinder parts of the thighs. 
Pamily— GWKOTII)^. 
7. Tehatosoincus keyseulingi. 
Strauch: Bull. Acad. Sci. St. Pet., ISGl, vi, p. 480;—Mel. Biol., vi, p. 554;—Zool. Kecord, 1864, 
p. 111. 
Kuli-yailing, Yarkandi (Scully). 
1, YangiEissar, Easteru Turkestan. 
This is a new locality for this very remarkable gecko. Terafoscincus heyserlingi was 
originally discovered by Count Keyserling in the Persian province of Khorassan, at a spot 
called Sar-i-chah, and it has since apparently been found in Western Turkestan, as it is 
included by Severtzoff in his list of the Eeptiles^ found in that province. It thus appears 
to have a considerable distribution in Central Asia. The original description was copied in 
the “ Zoological Becord.” 
The single specimen obtained by Dr. Stoliczka is not in a very good state of preservation, 
but still the characters are easily distinguishable. The following is a description : 
^ Anderson: Proc. Zool. Soc., 1872, p, 389;—^Eastern Persia, i i, p. 331. 
^ Turk. Jev., p. 71. 
