412 MEMOIRS OF THE CARNEGIE MUSEUM 



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



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

 sand-bank. (C. M. Cat. Nos. 1115a and 1996a-g; 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; pafietals 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 Erythriniinle. 

 Hoplias Gill. 

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

 Hoplias Gill, Proc. U. S. Nat. Mus., XXVI, 1903, 1015. 

 Type, Esox malabaricus Bloch. 



