192 REPORT OF NEW JERSEY STATE MUSEUM. 
as internasals, which are subtriangular with broad convergence 
anteriorly. Nasals rather deep, and nostril piercing most of 
posterior just after commisure. Rest of upper surface of head 
covered with small tuberculated scales. Scales on back all 
strongly keeled, and lateral series in contact with gastrosteges 
more or less smooth, though each with a slight median ridge or 
keel on posterior portion of body. Scales in 22 transverse series 
over back. About 220 scales counted from internasal plates to 
tip of tail, and rattles g in number. Gastrosteges 171 to vent. 
Urosteges single, 19 in number to rattle. Tail short, robustly 
rounded, slightly tapering to rattle, and about 114% in body. 
Color in alcohol light brownish below, upper surface darker or 
AER? 
Waistsrce 
ages eae y 
Rattle Snake. Crotalus horridus Linnzus. 
more or less tawny. On each side of median dorsal line 2 series 
of deep brownish dorsal blotches anteriorly, becoming confluent, 
and as broad or broader than paler interspaces. Blotches 24 in ° 
number, and upper median series larger on anterior part of body. 
Edges of these dark blotches all with more or less narrow traces 
of blackish within their areas, and paler brownish than ground- 
color without. Alternating between each of lateral dark blotches 
along each side of median line of gastrosteges, regular clusters 
of brownish dots over each group of 3 or 4. Under surface 
of tail deep brown like dark blotches on back and all of its 
