Mexican Amphibians and Reptiles. 699 
Hypopachus variol. 
Basiliscus 
Glauconia. 
Drymobius margar 
Himantodes 
Leptophis mexic. 
Dryophis acumın. 
Urotkeca. elapoides 
Ayla baudini 
Leptodira personal. 
Trimorphodon biscut. 
Phylodadylus tubere. 
Bufo marinus 
Ctenosura. acanthın. 
Streptophorus 
Leptodira albofusca 
Engysloma ustum. 
Elaps: fülvius 
Rhadinea. vittata 
Bufo intermedius 
Trimorphodon ypsuon. 
Anoüs nebulosus 
Hylodes rhodopis 
Bufo compactilis 
Hylodes calcitrans 
Dromicus laureatus 
List A. 
Showing the vertical distribution or range of 44 Southern species. 
Speeies which attain their unusual toplimit on mountains, are marked witk a ring 
(ef. page 700). 
Double lines indicate species modified for exelusively temperate or cold zones. 
11 species remain in the Tierra caliente. 
1 I EN ascend another thousand feet to 4000‘ 
BSOENO, ; ei 4500 or 5000‘ 
2 ® N 6000 
2 0228. % 7000 
1 H n 8000 
1 z ® 10000 
These 35, out of 42, “starting” from near sealevel, produce ina 
diagram a regular curve which shows that a considerable number 
