I 



FURTHER NOTES ON NEW JERSEY FISHES. 163 



interest to mosquito investigators in the case of Gamhusia is due, 

 Mr. Seal tells me, largely to its capability of destroying the 

 Anopheles or malaria mosquito larvae. As these occur usually in 

 very shallow places, often in the merest skim of water, such as 

 over lily pads, etc., the fish by being a top feeder, and also further 

 by the comparatively elongate slender body, is enabled to' reach 

 places and carry on its valuable destruction, which would be other- 

 wise inaccessible to deep-bodied or larger species. 



Heterandria formosa Agassiz. 



Plates 66 and 67. 



Least Killifish. 



Introduced by the New Jersey Agricultural College Experi- 

 ment Station, with Gamhusia, during November of 1905. 



Family BELONID^. 



(Mastaccembelidcu. ) 



Tylosurus marinus (Walbaum). 



Green Gar. 



Mr. H. Walker Hand reports it from Green Creek, Cape May 

 county. 



Reported from Great Egg Harbor Bay at Somers Point and 

 B'eesley's Point, where it is said sometimes to reach 2 feet in 

 length. Known as "gar." 



Mr. J. B. Vanderveer, of Trenton, says that he has seen adult 

 "bill fish" skimming along the surface of the water with their 

 bodies entirely out in the air, and inclined more or less perpen- 

 dicularly. They are very active and gambol about. Two varie- 

 ties, called "green bill fish" and "blue bill fish," are thought to 

 occur, and sometimes the large ones were eaten by the fishermen. 



Mr. R. C. Abbott tells me he found a bill fish which had been 

 caught bv the beak or jaws in a fresh-water mussel on the mud 

 flat at Burlington Island. As the tide receded it had left the fish 

 on the mud, the mussel closing its shell and thus retaining its 

 captive. 



