HEBPETOLOGY OF THE GRAND DUCHY OF BADEN. 179 



be overlooked, northern breeding birds arriving on the Holder- 

 ness and North Lincolnshire coasts largely using this route 

 during their land journeys. At certain times of the year the 

 effect of this migration is very apparent in Nottinghamshire. 



The most interesting feature connected with the Trent Valley 

 route is the fact of its being used as a highway in spring, birds 

 apparently arriving from the east and north-east. Amongst the 

 birds using this route in spring are the Dunlin, Common Sand- 

 piper, Redshank, Yellow Wagtail, and Sand Martin. I suggest 

 that these species, or some of them, reach us via the Rhone and 

 Rhine Valleys, and then across the North Sea to Lincolnshire, 

 but beyond my own observation I have found little to confirm 

 this theory. 



ON THE HERPETOLOGY OF THE GRAND DUCHY 

 OF BADEN. 



By (j. Norman Douglass. 

 (Continued from p. 144.) 



4. Lacerta muralis, Laur. — An accurate account of the peculiar 

 distribution of L. muralis in this part of South Germany was 

 published thirty years ago.* As this account is quoted in most 

 works on the subject, it will be unnecessary to give it here in 

 extenso, but it suggests a fact worth noticing which has not, 

 I think, been mentioned hitherto. 



It has been assumed that the immigration of this species into 

 this country has taken place via the gap between the Jura and 

 Vosges ranges (a route by which many other southern forms 

 have entered Germany), but, on comparing its actual distribution 

 with a map, considerable difficulties present themselves. In the 

 first place, the non-occurrence of L. muralis on the sunny slopes 

 of the Rhine-valley proper, and in other warm parts of the country 

 (on the Kaiserstuhl and the southern incline of the Schwarzwald, 

 for instance), appears very singular. Instead of this, it is found 

 high up in the Black Forest at several points over 700 metres 

 above sea-level, in cold and exposed situations. Further, it is 

 curious that L. muralis should be absent in localities where other 



Dr. Paulus, ■ Verein fiir Vaterland. Naturkunde in Wiirttemberg,' 1857. 



p 2 



