J. History of the Fishes of 21assarlmsetts. 



By DAYID HUMPHREYS STOKER, M. D., A. A. S. 



Continued froyn Vol F. p, 290. 



FAMILY XIII. CYPRINODONTID.E (contimiedy 

 GENUS II. HYDRARG-YRA, LAcip. 



Upper surface of head flattened ; but the jaws are not depressed. Fine card-like 

 teeth upon the jaws. Opening of mouth semicircular. Lower pharyngeal teeth with 

 rounded crowns, the medio-posterior ones the largest. Branchial rays six on either 

 side. Dorsal opposite to anal, as in the genus Esow. Caudal posteriorly subtruncated. 

 Upper surface and sides of head covered with scales. 



Hybraegyra flavula, Storer. 

 The Basse Fry. 



(Plate XXIII. Fig-. 5. Male. 6. Female.) 



Esox Jiavulusj Neio TorJc Gudgeon, Mitch., Trans. Lit. and PMl. Soc. of N. Y., i. p. 439, pi. 4, fi^. 8. 

 Ci/prinodon flavuluSi Val., in Humboldt and Bonpland, ii. p. 164, pi. 62, fig. 3. 

 Uydrargyra flavida, The Basse Fry, Storeb's Eeportj p. 95. 



" ** Athes, Bost. Journ. Nat. Hist, iv. p. 267. 



" " GiEAKD, in Lit. 



Hydrargyraformosa, Storee, Proc. Bost. Soc. Kat, Hist,, i. p. 76. 

 Uydrargyra trifasciata^ Stobek, Bost. Journ. Hat. Hist, i. p. 417. 

 Fundulus fasciatus, Striped Kiliijish, Deicat, Report, p. 216, pi. 31, fig. 98. 

 Hydrargyra vernalis, Cuy. et Val., Hist. Nat Poiss., xviii. pp. 206, 207. 

 Hydrargyra flamla^ Stoeee, Mem. Amer. Acad., New Series, ii. p. 4M. 



" " " Synopsis, p. 180. 



Color. Female of a yellowish-green above, lighter iipon the sides, and white be- 

 neath. Several longitudinal, interrupted black bands, sometimes five in number, may 



VOL. VI* NEW SERIES. 50 



