Fishes of the Western North Atlantic 



439 



Ocean City, Maryland; Noank, Connecticut; Point Judith, Rhode Island; Woods Hole 

 and Provincetown, Massachusetts; in collections of U.S. National Museum, Harvard 

 Museum of Comparative Zoology, and U.S. Fish and Wildlife Service. 



Distinctive Characters. Easily determinable features that separate M. freminvillii 

 from its genus mate M. goodei of the western Atlantic, are: inner ends of fifth pair of 



Figure 102. Myliobatis freminvillii, male, 761 mm wide, from Rio de Janeiro, Brazil (Harv. Mus. Comp. Zool., 

 No. 396). A Side view of anterior part of tail to show dorsal fin, about 0.4 x. B Side view of head. C Ventral 

 view of head and gill area. D Margin of left-hand side of nasal curtain, about 0.5 x . £ Myliobatis aquila, 340 mm 

 wide, from Mediterranean (.\cad. Nat. Sci. Philad.). 



gill openings only i. 0—1.2 times as far apart as distance between inner ends of nostrils 

 (1.6— 1.9 times in M.goodei); dorsal fin conspicuously larger in M. freminvillii relatively, 

 its base 0.9—1.0 times as long as the distance between the nostrils (only 0.6—0.8 times in 

 M. goodei); dorsal fin usually situated farther forward on tail in M. freminvillii, its origin 

 about opposite rear limits of pelvics or only a little posterior thereto (ordinarily posterior 

 to tips of pelvics by a distance 2—3 times as long as its own base in M. goodei); tips of 

 pectorals narrower in M. freminvillii (cf. Fig. 102 with 104); and breadth between axils 



