Fishes of the Western North Atlantic 



393 



straight across, its free edge deeply fringed, the individual marginal lobelets simple, 

 bifid, or trifid; the median lobelet sometimes considerably the largest. Mouth mod- 

 erately arched, the lower jaw slightly indented centrally. A deep furrow extending 

 rearward from outer part of nostril and from corner of mouth, the skin much wrinkled 

 and corrugated also over a zone of considerable breadth posterior to lower jaw, thus 



D 





S'^\ 





, (t>f 





''^ 





I iiiiiim**" 







■^-^^^SS-. 



Figure 94. Himantura schmardae. A Nostril and mouth of male, 563 mm wide, from Toro Point, Panama Canal 

 Zone (U. S.Nat. Mus., No. 86071), with nasal curtain rolled forward, about 0.9X. B Tip, and C Middle 

 part of tail spine of male, 248 mm wide, from Atlantic Panama (U. S.Nat. Mas., No. 128388), about 5.5 X. 

 D Small tubercles and large, from shoulder of same, about 5.5 x. £ Upper teeth of another male from the West 

 Indies (U. S.Nat. Mus., No. 33719), about 12 X. 



allowing a wide gape. Floor of mouth with five papillae, a blunt pair near midline 

 alternating with three much more slender. 



Teeth 5§E^8> close-set in quincunx; oval to elliptical, their long axes parallel to 

 jaw, the functional surface with broad furrow from side to side, irregularly scalloped 

 in contour. 



Pelvics with nearly straight anterior margins, weakly convex posterior margins 

 and narrowly rounded corners; their rear limits posterior to rear limits of pectorals by 

 a distance about half as great as distance between eyes; anterior margin of pelvic about 

 80 "/o as long as distance from its own origin to rear tip of pelvic. Claspers of mature 

 males not yet studied. 



Color. Uniform dark brown, sooty olive, or sepia above, the edges of the disc 



