Jordan and Evermann. Fishes of North America. 89 



laliceps, GILL, Ann. Lye. Nat. Hist. N. Y. 1865, 137, locality unknown, received 

 from San Francisco. It has never been properly compared with A, narinari, and may 

 not be different. 



56. MYLIOBATIS, Dum&il. 

 (EAGLE RAYS.) 



f Cephaleutliertis, RAFINESQUE, Indice Ittiol. Sicil., 61, 1810, (maculatus, probably a deformed ray). 

 DVMKRIL in Cuvicr, Regne Animal, Ed. 1, n, 137, 1817, (aquila). 

 , GILL, Proc. Ac. Nat. Sci. Phila., 1862, 331 (cespertilio = calij 'ornictis) . 



Disk broad, the outer angles acute. Cephalic fins forming a soft con- 

 vex appendage in front of snout. Jaws about equal. Median teeth very 

 broad, much broader than long in the adult, proportionally narrower in 

 the young. Several series of narrower teeth on each side of the median 

 series; teeth changing considerably with age. Free edge of the nasal 

 valve not deeply emarginate. Tail very long and slender, with a small 

 dorsal fin, and one or more serrated spines. Skin smooth or nearly so. 

 Size large. In all warm seas. (/uvMag, grinder ; /3<m'f, ray.) 



MYLIOBATIS: 

 . Ventral fins moderate. 



b. Teeth of main row 4 to 6 times as broad as long ; skin smooth. FREMINVILLEI, 133. 

 HOLORHINVS, (6Aos, solid ; piv, snout): 



<nt. Ventral tins large ; rhomboid, broader than long. 



c. Teeth of main row 3 to 4 times as broad as long. CALIPORNICITS, 134. 



Subgenus MYLIOBATIS. 

 133. MYLIOBATIS FREMINYILLEI, Le Sueur. 



Disk broader than long ; the breadth equal to the length of the tail. 

 Ventral fins much narrower than in C. californicus. Skin entirely smooth. 

 A blunt, whitish prominence over each eye. Muzzle prominent. Teeth 

 of the main row 4 to 6 times as broad as long; small teeth in 3 rows. 

 Reddish brown ; tail nearly black. Cape Cod to Brazil ; not uncommon. 

 (For Chretien Paulin de Fre*minville, a French naturalist.) 



i, LE SITEUR, Jour. Ac. Nat. Sci. Phila., iv, 111, 1824, Rhode Island. 

 MyUobatig biiyiiunxtis, STORER, Proc. Bost. Soc. Nat. Hist., i, 1841, 53, Massachusetts. 

 dr/ilioh/dis bispinosus, DUMKRIL, Elasmobranches, 637, 1870. 

 Mi/Jiobatis acuta, AYRES, Proc. Bost. Soc. Nat. Hist., i, 65, 1841, Connecticut. 



i, JORDAN & GILBERT, Synopsis, 51, 1883. 



Subgenus HOLORHINUS, Gill. 



134. MYLIOBATIS CALIFORNICUS, Gill. 



(CALIFORNIA STING RAY; BATFISH.) 



Disk not quite twice as broad as long ; the wings anteriorly convex, 

 posteriorly somewhat concave. Cephalic fin very blunt, nearly 4 times 

 as broad as long. Tail nearly twice as long as the disk. Ventral 

 large, broader than long. Lateral teeth in 3 to 5 series on each side ; 

 median teeth only 3 to 4 times as broad as long, even in the adult. Skin 

 wholly smooth. Color dusky brownish ; the young somewhat variegated. 



