34 



PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



depth of caudal peduncle 3|; caudal If; pectoral 1|; ventral If; 

 snout 3f in head measured from upper jaw tip; eye 3; maxillary 

 2f ; interorbital 4. 



Body elongate, contour evenly fusiform with greatest depth at 

 fourth dorsal spine base, and edges all convex, or with but slight 

 keel just before dorsal. Caudal peduncle compressed, about long 

 as deep. 



Head large, well compressed with flattened sides little approxi- 

 mated below, and profiles evenly and slightly convex. Snout rather 

 conic, convex over surface and slightly so in profile, length about 

 f its width. Eye very large, impinging on upper profile, and hind 

 pupil edge near head center in length. Mouth large, oblique, and 



Fig. 14. — Rhomhoplitoides megalops sp. nov. 



gape extends about opposite front nostril. Premaxillaries mod- 

 erately protractile. Maxillary ol^lique, upper edge entirely slips 

 below preorbital, reaches first third in eye, and expansion 2^ in eye. 

 Lips thick, firm, tough, largely conceal teeth, lateral in jaws. Teeth 

 in jaws in narrow bands, villiform, and with outer row of simple 

 enlarged well-spaced canines, only visible in profile in front of upper 

 and side of lower. Vomer with an elongate patch of villiform teeth) 

 in outhne similar to a narrow kite. Each palatine with narrow 

 well-developed band of villiform teeth. Mandible rather robust, 

 moderately deep, rami little elevated inside mouth, and symphysis 

 slightly protrudes when closed. Buccal folds within mouth rather 

 narrow. Nostrils rather large, simple, front one near last third in 



