1889.] NATURAL SCIENCES OF PHILADELPHIA. 263 



anterior portion of second dorsal brown ; central portion with a 

 horizontal white and black band, and tipped with white ; posterior 

 portion with two vertical black stripes and a white one between them ; 

 caudal black, tipped with white, with two longitudinal white stripes, 

 its upper and lower edges narrowly white ; anal white at base and 

 tip, with a black median band half the depth of fin, darkest poste- 

 riorly, with last ray white ; pectorals brown with a black band below, 

 and the lower edge white; ventrals white, with a black longitudinal 

 streak near tip and center of fin. Head 21 in body ; depth 3£ ; D. 

 IV-I, 13; A. 13; length 12 inches. 



Y-GRAECUM. 



4. Upsilonphorus Y-graecum. 



Uranoscoptts Y-graecum Cuv. and Val., Hist. Nat. Poiss. III. 308, 

 1829 (origin unknown); Giinther, Cat. Fish. Brit. Mus. II. 229, 



1860 (Caribbean Sea). 



Upsilonphorus Y-graecum Gill, Proc. Ac. Nat. Sci. Phila. 113, 



1861 (Caribbean Sea); Jordan, Cat. Fish. North America. 118, 

 1885: Jordan, Proc. U. S. Nat, Mus. 28, 1886 (Beaufort, N. C.) ; 

 Jordan, Manual Vertebrates U. S. Ed. V. 156, 1888. 



Astroscopus Y-graecum Bean, Proc. U. S. Nat. Mus. 58, 1879 

 (Saint John's River, Fla., and Matanzas River Inlet, Fla.) ; Gill, 

 Proc. Ac. Nat. Sci. Phila, 21, 1860 (name only); Jordan and 

 Gilbert, Synop. Fish. North America, 628, 1883. 



Habitat. — Atlantic Coast of North America in sandy bays, from 

 Cape Hatteras to Surinam. 



Etymology. Lat, Y-graecvm, the letter Y. 



Specimens are in the National Museum from Matanzas River In- 

 let, Fla., and Saint John's River Fla. 



This species is rather common along the coasts of the South 

 Atlantic and especially the Gulf States, in sandy bays, mostly in 

 shallow water. The specimens examined by me are from Pensacola, 

 and Beaufort, N. C. 



Naked space between forks of Y on top of head short and broad, 

 but longer than the vertical limb of the Y, which is very short; two 

 distinct spinules directed forward before eye ; white spots on body 

 very small and irregular without dark rings; eye 5i in interorbital 

 space; base of the dorsals equal in length to the distance from front 

 of first dorsal to tip of snout ; base of first dorsal twice length of its 

 longest spine ; first spine equal to the second in length, and three 

 times the length of the last ; length of middle caudal rays a little 

 less than that of ventrals ; pectorals slightly longer than ventrals, 



