164 Annals of the Carnegie Museum. 



from posterior angle of mouth to first gill opening one diameter of 

 pupil less than distance from upper lip to tip of snout. A deep pocket 

 of membrane is placed at the angle of the lower jaw and covered by 

 the upper jaw when the mouth is closed. Teeth in lower jaw nearly 

 horizontal; eight cusps on each with sometimes a rudimentary ninth; 

 the inner edge of each tooth finely serrated; the symmetrical median 

 tooth with three or four cusps on each side. A group of sharp slender 

 teeth at center of upper jaw; the other teeth longer, directed towards 

 side of jaw, and with one or two cusps on outer base of each. First 

 gill-opening very long, the others becoming progressively shorter 

 backwards; the last, which is contained 3.2 times in head, is three- 

 fifths of the length of the first. When the skin is stretched flat across 

 the throat the distance between the lower ends of the first gill-openings 

 of opposite sides is equal to the length of the fourth gill-opening. 



The front of the dorsal is over, or a very little behind, the posterior 

 end of the ventral base, while the posterior end of the dorsal base is 

 a trifle in front of the middle of the anal base. Distance of base of 

 dorsal from caudal base is contained 1. 16 times in postorbital part of 

 head. Anterior slope of dorsal equal to its base, or to base of anal, 

 or to anterior slope of ventral. Posterior margin of dorsal very slightly 

 concave; other fins (except caudal) truncate or convex. Anterior 

 slope of pectoral 1.4 in head. When the pectoral is laid close to the 

 body it reaches half-way between the upper part of its base and base 

 of ventrals. Caudal with a very deep notch towards its tip; its lower 

 lobe scarcely developed; anterior slope of lower lobe contained 4.33 

 times in length of upper lobe, which is contained 2.2 times in rest of 

 body. 



Color dark slate, growing lighter below, but not white; under side 

 of snout soiled white; a narrow light lateral stripe along upper part 

 of side to opposite dorsal. 



Family RAJID^. 

 2. Raja rhina Jordan and Gilbert. 

 The adults were commonly taken on set-lines and the young were 

 dredged in deeper water. The following descriptions are of speci- 

 mens from various localities from the Gulf of California to Puget 

 Sound. 



Specimens of both sexes measured on median line from between 

 the front of the eyes were from thirty to forty inches in length. 



