6 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Padang fish differs in the maxillary reaching the pupil, gill-opening 

 extending forward about to front pupil edge, longer hind dorsal 

 rays and much finer scales, though the last structurally identical. 



Xenentodon cancila (B. Hamilton). 



Ganges River, India. 



Potamorrhaphis guianensis (Schomburgk). 



Peruvian Amazon and Rupununi River. Potamorrhaphis eigen- 

 manni Ribeiro^, from Paraguay, has D. 28, A. 25 and scales 136 to 

 150. My examples reveal an extent of variation not quite so 

 low as these formulas, other characters well within the limits, 

 and still others exceeding even some Dr. Ribeiro gives for P. 

 guianensis. 



Ablennes hians (Valenciennes). 



St. Christopher's Island, British West Indies. 



SCOMBERESOCIDiE. 

 Scomberesox saurus (Walbaum). 



Newport, R. I.; Cape Cod, Mass. Three from the Atlantic in 

 the Bonaparte Collection. 



HEMIRAMPHID^. 

 Chriodorus atherinoides Goode and Bean. 



Marquesas Keys and Hailer's Rock, Florida. 



Hyporhamphus pacificus (Steindachner). 



Hawaiian Islands. 



Hyporhamphus neglectus (Bleeker). 



Padang, Sumatra. 



Hyporhamphus unifasciatus (Ranzani). 



Colon, Canal Zone; St. Martin's, W. I.; Trinidad; Boqueron, 

 Porto Rico; West coast of Mexico; Los Animas Bay, Lower Cali- 

 fornia. Provisionally this species may be retained as the short- 

 billed form, though I have but one example from the Boqueron 

 lot and another from the west coast of Mexico as exceptions. 

 None of the young appear to have longer beaks than the adults. 



2 Arch. Mus. Nac. Rio Janeiro, XVII, 1915, p. 13. 



