NATURAL SCIENCES OF PHILADELPHIA. 485 



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anterior temporal ; two internasals ; two prefrontals, much longer than the 

 internasals ; a frontal longer than broad, occipitals large. Head somewhat 

 broader than neck, posteriorly ; scales smooth, lanceolate, 19 or 21 rows ; nearly- 

 quadrangular upon the tail ; anal and subcaudal scutes bifid ; abdomen slightly 

 angular; tail long and tapering; posterior tooth much longer than the rest 

 and distinctly channelled; the teeth in the upper jaw increase in length as 

 they recede backward. 



CONIOPHANES PISSIDENS nob. 



Spec. char. 19 rows of smooth scales near the middle ; color brownish, 

 approaching to violet, with two somewhat indistinct lateral stripes, and a 

 median dark colored one upon the back; abdomen whitish, with a row of 

 minute black points on each side and upon the tail ; a narrow white vitta, 

 commencing on the first labial, passes beneath the eye along the temples, and 

 is lost upon the sides of the neck ; another, shorter upon the back, commencing 

 at the occiput. Total length 8 inches; of tail 7 \ inches; circumference 1 inch. 



Habitat. Nicaragua. One specimen. 



OxYCEPHALID^E. 



Dryophis aeneus. One specimen. 



Conocerques. (Serpens Proteroglypb.es.) 



Elaps Schn. 



Elaps melanocephalus nob. 



Spec. char. Entire head, chin and throat black; 16 black rings upon the 

 body, margined with white ; 4 distinct rings upon tail ; inter-spaces between 

 black rings spotted with black; 200 abdom. scuta; a double praeanal ; 52 

 subcaudal; 15 rows of scales. 



Habitat. Nicaragua. One specimen. 



BATE AC HI A AN OUR A. 



Ranid^:. 



Cystignathds melanonotus nob. 



Spec. char. Color black above, black spotted ; a black subround spot 

 between the eyes ; under parts white, minutely mottled and spotted with 

 brown ; body and extremities slender. 



Description. Head of moderate size, eyes not remarkably prominent, tympanum 

 well developed, tongue obcordate, not notched posteriorly ; palatine teeth in 

 two transverse rows; the anterior margin on a line with the posterior margin 

 of the posterior nares ; color as stated in the specific character. 



Dimensions. Length of head 4 lines ; greatest breadth 3 ; length of head and 

 body 9 lines; length of anterior extremities 6 lines ; of posterior, 1 inch; of 

 thigh 3 lines ; of leg 4 ; of tarsus 2 lines ; of foot to extremity of longest toe 

 4J- lines. 



Habitat. Nicaragua. One specimen ; perhaps the young of a larger animal. 



Hylid^:. 

 Hyla grisea nob. 



Spec. char. Skin smooth, tongue obcordate, notched posteriorly, palatine 

 teeth in two fasciculi behind the posterior nares ; color light grey, a brown 

 above, with darker maculations ; length 1| inches. 



Description. Head triangular; snout somewhat acute; nostrils two lines 

 apart; tongue obcordate, slightly notched posteriorly; extremities slender; 

 toes palmate at their base, the webs reaching to the proximal extremity of the 

 second phalanx, tympanum of moderate size, eyes slightly prominent. Color 

 grey or brownish above, with a transverse bar of darker grey between the 



I860.] 



