REVIEW OF THE ERYTHRININ.E. 101 



c. Walls of the air bladder normal. Outer series of palatine teeth en- 

 larged and removed from the villiform teeth; a detiched patch of teeth 

 in front of the palatines, Dentary with canines anteriorly and latei- 

 ally. Maxillary with a canine auteriorlx ; all teeth pointed. Dentary 

 process joined to the dentary at the symphysis, within the lateral can- 

 ines and merging into the dentiferous ridge midway between symphy- 

 sis and posterior angle of dentary; the pit formed behind the larger 

 canine and the one behind the lateral canines filled with numerous 

 short conical teeth which lie concealed in the muscles; a deep pit in 

 the intermaxillary for the reception of the larger dentary canine. 

 Snout pointed; maxillary and mandible extending beyond the orbit. 

 Supratemporal plate single. D. 12-15; A. 11. Lat. 1. 39-U (fig. 1). 



Macrodon 1. 



cc. Walls of the anterior portion of the posterior air bladder cellular. 



Palatine teeth all villiform. in a single patch on the sides of the palate. 



Maxillary with pectinate teeth only, no canines. Dentary with short 



conical teeth; two canines near the symphysis the outer of which is 



the larger; no lateral canines. All the teeth blunt. Dentary process 



joined for its whole length to the dentiferous ridge. Intermaxillary 



without a pit. Snout decurved, rounded. Supratemporal plate double. 



D. 11-12; A. 11; Lat. 1. about 33 (fig. 2). Erythrinus 2. 



bb. Gape oblique, not reaching beyond middle of orbit, usually shorter. 



Maxillary with a few slender teeth, no canines. Palate edeutulous or 



shghtly roughened in Lebiasina; caudal forked or emargiuate. Lateral 



line obsolete or developed on a few scales only. 



d. Walls of the air bladder normal. Teeth all conical; intermaxillary 

 teeth in one or two series; dentary teeth in two series; maxillary 

 teeth in a single series; mouth very oblique; maxillary not reaching 

 orbit, Cypiinit'orm. Species with a black spot on dorsal (fig. 3). 



Pyrrhulina 3, 

 dd. Walls of the anterior portion of the posterior air bladder cellular. 

 Intermaxillary, maxillary and outer series of the dentary teeth tri- 

 cuspid; dentary with an inner series of much finer conical teeth 

 separated from the outer series by a deep groove; supratemporal 

 plate double (fig. 5). Lehiasina 4. 



cm. Dorsal over the anal. A. 20-31; V. 6. Opercle terminating iu a spine 

 or filament. Teeth compressed, with multicuspid crowns, the median 

 cusp longest, in two rows on intermaxillary, in a single row on mandible; 

 palate toothless. Caudal deeply forked; lat. 1. present. Body subfusi- 

 form, compressed. Mouth moderate, obhque, Sttvardia 5. 



I. Macrodon. 

 Macrodon Miiller '42a^ 308 (traJiira). 



* See Bibliography at end of paper. 



