1854.] 61 



edge is indistinct) and sending a dark branch across the arm to the chin. No 

 bars on the limbs. Body about two inches in length. 

 Hab. Anderson, South Carolina. 



8. Ihjla exlmia, Baird. Smooth above. Tibiajnot half the total length of 

 body. Hind foot not longer than arm from elbow. Bluish above, with two dark 

 longitudinal stripes; beneath white. A dark band from the eye along the sides, 

 margined above and below by a white line, the latter reaching only to the arm, 

 behind which the outline of the dark band is indistinct. Legs not banded. Body 

 about an ineh long. 



Hab. City of Mexico. 



9. Hyla vanvlietii, Baird. Nearly smooth above. Tympanum nearly as large 

 as the eye. Tibia half as long as the body, longer than arm from elbow, which 

 in turn exceeds the foot. Ash gray or olive, with an irregular cruciform dorsal 

 blotch. A black spot on the side above the foreleg. A white spot under the 

 eye. Thigh and leg with three transverse bands each. Their inner surfaces 

 (when flexed) scarcely reticulated, but spotted with white upon a darker ground. 

 Inside of tibia uncolored. Body two inches long. 



Hab. Brownsville, Texas. 



10. Hyla affinis, Baird. Body rough. Tympanum two-thirds the size of eye. 

 Tibia not quite half the length of the body, but reaching more than halfway 

 from anus to centre of eyes. Color ash gray or green, with numerous rounded 

 dorsal blotches. Three transverse bands on each thigh and leg. No vermicu- 

 lation on anterior and posterior faces of hind legs, nor on lower part of sides. 

 A light spot under the eye. Web of hand extending only to the third joint of 

 the second finder. Arm from elbow less than tibia, but longer than hind foot. 

 About li inches long. 



Hab. Northern Sonora. 



RANIDiE. 



Teeth in upper jaw. Abdomen smooth. Two outer metatarsals free for most 

 of length, or united only by membranes. 



11. Rana montezumce, Baird. Head as wide as long. Body generally smooth, 

 except pustulation on the sides and sometimes above. No fold of skin, either on 

 the sides or around the tympanum. Tympanum about size of eye; but little 

 variation with sexes. Large vocal vesicles on each side behind jaws. Tongue 

 broad, cornua short. Palatine ^protuberances close together. Toes not webbed 

 beyond middle of last phalanges on the external sides. Color purplish olive 

 above, grayish below, with crowded spots or vermiculations of whitish all over 

 the body. In young specimens, rounded, areolated, dark blotches on the back and 

 foreleg. Size, that of Rana pipiens of Holbrook. 



Hab. City of Mexico. 



12. Rana septentrionalis> Baird. Body stout, depressed. Skin not tuberculated, 

 but uneven. A broad depressed ridge on each side of back; none intermediate ; 

 a branch of same round the tympanum, meeting a thickening from the jaw. Hand 

 much longer than forearm. Femur and tibia nearly equal, about half the length 

 of the body, and less than the hind foot. Foot large ; terminal joint of middle 

 toe free ; that of the others free only on the inner side. Above light greenish 

 olive, vermiculated with lighter, and with a few large dark blotches posteriorly. 

 Beneath yellow, unblotched. No line on sides of the jaw. Two inches long. 



Hab. Northern Minnesota. 



13. Rana sinuata, Baird. Body rather stout; tympanum three-fourths the 

 size of eye. Palatine teeth small, ranging with the centres of inner nares. Skin 

 pitted all over with minute pores, with scattered glandules beneath; an indistinct 

 fold of skin on each side of back, none intermediate ; granulation of buttocks in- 

 distinct. Femur not half the length of body, rather longer than tibia ; hind foot 

 considerably longer than the tibia. Above and on sides purplish brown, with 



