500 The American Naturalist. [June, 



respiratory capacity of that cavity increased more rapidly than that of 

 the lungs, which is the easier to understand, as the air breathed must 

 first pass through that cavity, and because the cavity is rather large. 

 When this capacity had developed to a certain extent, the lungs were 

 no longer needed, and gradually atrophied from disuse. 



All the salamanders examined lead a more or less terrestrial life; 

 but the peculiar characteristic of reduction of lungs is not confined to 

 terrestrial forms. (Zool. Anz. XIV, Bd., No. 494, 1896.) 



Batrachia Found at Raleigh, N. C.—Neehirus maculatus. 

 Water Dog. This species is caught by anglers in the spring, and seems 

 scarce, as I have only seen eight specimens so far, none of which 

 measured over 7 h inches in total length. Some of them were evidently 

 breeding females. 



An>bfy*tovia opacum. Marbled Salamander. Common. They lay 

 their eggs in dry season under logs on the edges of dried-up pools, and 

 the eggs hatch out quickly when the pools fill up again from rain ; 

 whether they do this in wet seasons I do not know. Sometimes 

 the larvse are very abundant, sometimes very scarce. This winter, 

 after a dry autumn, they are abundant. Last winter, after a wet 

 autumn, I found difficulty in securing any. The eggs are laid in 

 October and November. 



Amh!<i.<t„))m punctatum. Quite rare here. 



Plethodon glutinosus. Viscid Salamander. Very common under 

 rotten logs in woods. 



Munrulns qumlridigit-atus. Tolerably common. This species enters 

 the water in December to breed, and retires to dry land again about 

 February. It seems entirely terrestrial, except when breeding. I took 

 nearly full grown larvae in May, 1895. 



Spelerpes bilineatus. Striped Salamander. Common. This sala- 

 mander is found in the water, breeding from December to March ; the 

 larvse first appear in May, and do not attain their full growth till a 

 year or more afterwards. Except in the breeding season I believe it to 

 be entirely terrestrial. 



Spelerpes guttolineatus. Tolerably common. Found mostly in or 

 around rocky springs or on the edges of rocky brooks, or of the larger 

 streams. They can be taken containing eggs in November; but I have 

 never seen any larvae that had any sign of belonging to this species. 



Spelerpes ruber. Red Triton. Aquatic, though like the next species 

 sometimes found under logs not far from the water. Judging from the 

 varying size of larvae taken at the same time of year, I think it proba- 



