(13) br ST. I. BOLKAY. 297 
colus has a relative in Varanus griseus Daun., and Pelobates robuslus 
in Pelobates syriacus Brrer.! 
We may solve the whole problem by this two species. To this 
reckon yet amongst the Amphibians Molge Karelinit Strauch, amongst 
the Reptiles Ophisaurus pannonicus Korn., the descendants of which 
live now in the mediterranean region. 
Ophisaurus pannonicus Korm. undergoing perhaps on some chan- 
ges, has lingered yet for a time in:the environs of Püspökfürdö. 
It seems to be in general, that Püspökfürdö was a refuge for 
several now mediterranean species in the Pr&glacial and even in the 
Pleistocen periode. 
I am inclined to refer the remains of Lacerta viridis Laur. here 
described to the form-group of Lacerta major Brer. that is to say 
Lacerta strigata Fıcmw. living now in Asia-Minor and Syria also. 
The ineompletness of the remains prevented me however to 
unite them with the species here mentioned. 
In this manner only the logical supposition remains, that there, 
where Ophisaurus and Molge Karelinü were found, the natural 
surroundings were not the same as shonld be favourable to the typical 
Lacerta wiridis; so that by this reason we could rather suppose the 
ancestor of Lacerta major, the descendant of which is still now occurs 
side by side with Ophisaurus and Molge Karelinit. 
In account of seeing this whole question as lightly as possible, 
let us suppose, that before the Glacial periode, strietly speaking in the 
Pannonian age, when the climatic zones were not yet so sharply 
limitid as now, this southern and south-western species may have 
been distributed all over the Periaretie and Palwaretie regions of 
to-day. 
In the time, when the first great glaciers came from the north, 
the more delicate species little by little extincted, others less delicate 
remained on several protected spots, and spreading out from them, 
populated our pleistocenie regions. 
After the definite withdrawal of the glaciers the mediterranean 
and south-western asiatie species have reconquered their ancestral 
territoriums northwards as far, as the newly warmed up elimate made 
it possible. 
All the species, which lived here in this periods and live here 
I | compared during the description Pelobates robustus with Pelabutes cultri- 
pes (uv., having no material from ‚Pelobates .syriacus. The latter species otherwise 
agrees striclly with Pelobates cultripes in osteological marks. 
