SYNOPSES AND DESCRIPTIONS. 39 
side from the nasal through the eye along the flank there is a black 
band three or more scales in width. Below the black a band of yel- 
lowish green a scale or more in width separates it from a second dark 
band about half a seale in width; one or the other of these is often obso- 
lete. Outer rows dull yellowish green. Belly uniform dull yellowish. 
Mexico. 
var. HEXALEPIS. 
PHYMOTHYRA HEXALEPIS Cope, 1866, Proc. Ae. N. Sc., Phil., 304. 
Is shorter, and has the loreal divided. 
SALVADORA DECURTATA. 
PHyYMOTHYRA DECURTATA Cope, 1860, Proc. Ac. N. Se., Phil., 310. 
“This species is distinguished by many features. The head is short- 
ened and somewhat arched, the rostral plate very broad and free, entirely 
separating the internasals. There is a complete annulus of scales around 
the eye. The tail is relatively shorter than in the known species. 
“Ground color light grey; a series of elongate parallelogramic brown 
blotches occupies the dorsal region, from the nape to the end of the tail. 
Labials and under surfaces unspotted. Length about 14 inches. This 
serpent is remarkably different from the three already known representa- 
tives of the genus. In these the orbit rests on the labials, and the color 
is in bands.” Upper part of Lower California. 
CycLorpuis, 
Giinther, 1858. 
Body slender, belly rounded; head ovoid, distinct from the neck; tail 
long, tapering regularly. Eye somewhat large, pupil round. Teeth equal, 
smooth. Head-shields nine. Loreal present or lacking. Nasal entire. 
Orbitals 1—2. Scales smooth in 15 rows, or keeled in 17. Anal and 
subcaudals bifid. 
CYcLOPHIS VERNALIS, pl. IIT, fig. 4. 
Couper yernauis (De K.) Harlan, 1826, Jour. Ac. N. Sc., Phil., V, 361. 
CyYcLopuis VERNALIS Giinther, 1858, Cat, Col. Snakes, 119. 
Moderately slender, subcylindrical, with flat belly. Head moderate, 
distinct from the neck, sides concave in front of the eye. Tail rather 
stout, near one third of the total, tapering. Eye medium, over the third 
