412 MEMOIRS OF THE CARNEGIE MUSEUM 



I have examined the specimen figured by M tiller and Troschel and: 



Twenty-eight specimens, 120-200 mm., and one about 340 mm. Rockstone 

 sand-bank. (C. M. Cat. Nos. 1115a and 1996a-«; I. U. Cat. No. 12244.) 



One specimen, 500 mm. Rupununi. (C. M. Cat. No. 2464.) 



Head 2.8-3.42; depth 6.5-7.5; D. 10; A. 10 or 11; V. 9; P. 30; scales 12-100 

 to 108-8; eye 4.3-5 in snout, 8-8.5 in head, 1.5-1.75 in interorbital. 



Elongate, snout and lower jaw greatly prolonged into a slender pointed beak ; 

 upper jaw ending in a fleshy or cartilaginous tip more than half as long as the eye. 

 Profile from dorsal to tip of snout nearly straight and horizontal; parietals with a 

 zigzag suture; no fontanel; snout considerably more than half the length of the 

 head; teeth minute, very numerous, in a single series in each jaw. Maxillary 

 meeting the premaxillary at a distinct angle, ankylosed with it; cheeks with a very 

 narrow naked border below the suborbitals in the young, entirely covered in the 

 old; gill-rakers about twelve on the lower arch, very small, the anterior ones reduced 

 to imbedded tubercles. 



Dorsal nearer to ventrals than to anal, narrowly rounded or obliquely truncate; 

 caudal forked, the lobes not more than twice the length of the middle rays, some- 

 times shorter; anal emarginate in the adult, the anterior rays reaching tip of last 

 ray, the last three or four rays prolonged, the third from the last sometimes reaching 

 the caudal; ventrals small, truncate or emarginate, reaching about half-way to 

 anal; pectorals very broad, the inner rays minute, the outer 2.2-2.5 in the distance 

 to the ventrals. 



Lateral line nearly straight, not continued on the basal scales of the caudal; 

 scales regularly imbricate, with numerous irregular striae and denticulate margins 

 in the adult. Fins naked. 



A lateral band in the young, narrow and distinct from the eye to the opercle, 

 broader and less regular on the sides; back irregularly spotted; outer margins of 

 upper and lower caudal lobe, and anterior margin of anal light, the rest of the fins 

 blackish; dorsal, ventrals, and pectorals hyaline; a small black ocellus at the base 

 of the middle caudal rays. These markings, with the exception of the caudal 

 ocellus, are less distinct in the adult. 



Subfamily Erythrinin^e. 

 Hoplias Gill. 

 Macrodon Muller and Troschel, Horoe Ichth., Ill, 1842, 6. 

 Hoplias ('.ill, Proc. U. S. Nat. Mus., XXVI, 1903, 1015. 

 Type, Esox malabaricus Bloch. 



