C04 DR. A. GUNTHER ON THE FISHES OF PANAMA. [DeC. 13. 



total (without caudal). Origin of the dorsal fin much nearer to 

 the snout than to the caudal. No humeral spot. 

 Libertad. 



Engraulis mysticetus. 



D. 17. A. 20. L. lat. 42. 



The length of the head is contained twice and four-fifths in the 

 total (without caudal). 

 Panama. 



Rhinobates leucorhynchus. 



Anterior nasal valve not prolonged to the inner angle of nostril. 

 Disk longer than broad ; praenasal part of snout not so long as broad 

 at the base, but longer than the distance between the front extremi- 

 ties of the nostrils. A series of very small tubercles along the middle 

 of the back. Nostrils longer than the space between their posterior 

 extremities, but shorter than the mouth. 



Panama. 



This memoir will be published entire in the Society's * Trans- 

 actions.' 



