346 PROCEEDINGS OF THE ACADEMY OF 



in diss ol eu cus, are yellow, and much narrower in elegans; the latter 

 has a yellow ring round the neck, and the black does not extend upon the throat. 



51. E. Mar cgravii? Neuioeid. Two sp. Dr. Wilson. 



52. E. lemniscatus Schneider. 



One sp. Surinam. Dr. Hering. 



One sp. 



53. E frontalis D. $ B. 



One sp. South America. Dr. Wilson, 



Two sp. " ? 



54. E. baliocoryphus nobis. Body rather stout. Head broad, depressed, 

 but still distinct. Tail short, one-fourteenth of total length. Scales in fifteen 

 rows. 



Fifteen triads of black rings four scales apart posteriorly, increasing in dis- 

 tance anteriorly to eight. Scales in these intervals broadly tipped with brown- 

 ish black. Exterior ring of the three, two and two and a half scales wide, 

 separated by a space of equal width from the central, which is three and four 

 scales wide. The first ring is four scales back of the occipital plates. The 

 scales in this interval, and the temporals are broadly tipped with black. Occi- 

 pitals black, anteriorly and posteriorly edged with the light color, perhaps red 

 in life. A spot below and in front of the eye, the superciliaries and vertical 

 black, the last pale-edged anteriorly. Fost-frontals immaculate, pre-frontals 

 black, anteriorly light-edged ; apex of rostral black. Except three black blotches 

 on the chin, the other plates of the head are of the light color. 



Gastrosteges 226 ; anal one, divided ; urosteges 26 pairs. 



Length 2 feet, 8 inches. The tail 1 inch, 9 lines. 

 One sp. Buenos Ayres. Dr. Kennedy. 



This species resembles E. lemniscatus somewhat: it is peculiar for the 

 shortness of the head. 



55. E. surjn amen sis Cuv. 



One sp. Surinam. Dr. Colhoun. 



2. BENDRASPIDINJE. 



Fangs without external trace of the canal. 



Dendraspis Schlegel. 



Verslag. Zool. geuootsch. Amsterd., 1848. Dinopkis Hallow., Proc. Acad. 

 Nat. Sci., 1852, p. 203. 



56. D. Jamesoni Schlegel. Maps Jamesoni Traill, Trans. Schlegel's Essai, 

 p. 179, 1843. Dinophis Hammondii Hallow., loc. cit. 



Two sp. Liberia. Dr. Goheen. 



In this species the superior maxillary bone is elongate, and much compressed, 

 not offering any plane surface for the attachment of solid teeth. There is a 

 malar process of considerable length, which is connected by ligament with the 

 posterior frontal bone. 



III. HYDROPHID.E.* 



Platdrus Latr. 

 Kept. Tome iv., p. 185. 



57. P. fascial us Daudin. 



One sp. East Indian Ocean. C. Guillou. 



Disteira Lacep. 

 Ann. Mus. Fr., iv., p. 199. 



*Swainson, Fishes Amphibia, etc. Lardner'sCab. Cyc, 1839. Hydridae, Gray, 

 Zooleg. Miscell., 1842. 



[Dec. 



