240 
LEBIASINA BIMACULATA, Cuv. & Val. 
This species has, during life, a red spot on the third scale of the 
fourth longitudinal series. 
BRYCON DENTEX, 0. sp. 
D.11. A.35. V.1/8, L.lat. 48. LL. transv. 9/7. 
Intermaxillary with four, maxillary with a single series of teeth ; 
a series of much stronger ones in the mandibula, and a pair of smaller 
teeth behind. The mandibulary teeth correspond to the posterior 
series in the upper jaw, the anterior series being free and not covered 
by the lower jaw. The height of the body is contained three times 
and three-fifths in the total length, the length of the head five times 
and one-fifth. The interorbital space is slightly convex, and its 
width is one-third of the length of the head. The pectoral extends 
on to the posterior portion of the root of the ventral. The dorsal 
is as remote from the occiput as from the root of the caudal.  Sil- 
very ; the lining membrane of the humeral arch and the margin of 
the anal blackish ; the other fins reddish. 
Hab. Fresh waters of Esmeraldas. 
inches. lines. 
PotalTensth ses Fo As Sie Si aie t's oie ags TAD ORO 
Height of the body .......... pica tats 1 2 8 
Length of the head ...... quien sst... woh tal Spee 
Width of the space between the eyes...... 0 8 
9. DrescripTION OF HoMALOCRANIUM LATICEPS, A NEW SNAKE 
FROM CARTHAGENA. By Dr. ALBERT GUNTHER. 
A Snake presented by Capt. Garth to the British Museum proves 
to belong to a new species. It was procured at Carthagena. 
HoMALOCRANIUM LATICEPS. 
Diagnosis.—Scales in fifteen rows. Head broad, depressed as in 
Elaps. Seven upper labial shields, the third and fourth of which 
enter the orbit ; two posterior oculars. Above black, with about 
twenty-three narrow brownish-yellow rings, the first forming a collar ; 
belly brownish-yellow. 
Description.—This Snake much resembles an Elaps in general 
habit, but there is no fang anteriorly, and the last maxillary tooth is 
longer than the others, and appears to be grooved. The rostral 
shield is rather low, triangular, and somewhat bent backwards on 
the upper surface of the head ; the anterior frontals are much broader 
than long, and only one-fourth of the size of the posterior ; the ver- 
tical is six-sided, not much longer than broad ; occipitals moderate. 
The nostril is between two shields, the anterior of which is the 
largest ; loreal none ; one anteorbital. Seven upper labial shields, - 
the second of which is in immediate contact with the posterior frontal ; 
the third and fourth form the lower part of the orbit; the fourth 
and fifth touch the lower postorbital; the sixth and seventh are 
