11. RAJA. 465 



single spine on the middle of the shoulder ; and young examples 

 have a round obscure spot on each pectoral fin. 

 a-c. Young. San Francisco. Presented by Dr. W. 0. Ayres. 

 d. Young : skin. Esquimalt Harbour, Vancouver Island. Collected 

 by Mr. Lord. 



10. Raja agassizii. 



Uraptera agassizii, MiUl. i^- Henlc, p. loo, tab. 49 ; Citstehi. An. Am. 

 Slid, Poiss. p. 100, pi. 49. fig. 2 ; Diimeril, Ehtsinohr. p. 573. 



Snout long, produced, pointed, the width of the iiiterorbital space 

 being two-sevenths or one-third of the distance of the cj'e from the 

 end of the snout. The anterior profile (from the snout to the angle 

 of the pectoral fin) is undulated. Mouth stronr/Ii/ curved. Teeth 

 pointed, in about 48 series in the upper jaw. Palatal velum four- 

 lobed. Outer pectoral angle a right one, but rounded. The distance 

 between the two dorsal fins is twice the length of the base of the 

 first ; terminal caudal fin reduced to a fold of the skin *. Body 

 sometimes smooth, sometimes with a few thorns on the orbital margin 

 and shoulder. Tail with a single series of spines. Disk rather 

 broader than long. Coloration uniform, sometimes a dark spot on 

 each side of the back ; lower side white. 



BrazU. 



a. Female. From Prof. Kolliker's Collection. 



17. Raja marginata. 



Raja marginata, LacSp. v. p. 663, pi. 20. fig. 2; Misso,' Eur. Merid. 

 in. p. 148 ; Blainv. Faun. Fr. p. 19, pi. 3. tig. 2 ; Flem. Brit. An. 

 p. 172 ; Bonap. Faun. Ital. Peso. ; Jemjns, Man. p. 512 ; Miill. Sf 

 JTenle, p. 140 ; Yarrell, Brit. Fish. 2nd & 3rd edit. ii. p. 564 ; Couch, 

 Fish. Brit. Is/, i. p. 110, pi. 20; Dum^ril, Elasmoh: p. 568. 



rostrata, Larep. iv. p. 672. 



rostellata, Risso, Ichth. Nice, p. 8, pis. 1 & 2, and Eur. Mdrid. iii. 



p. 148. 



oxyrhvnchus (Burton Skate), Couch, I. c. p. 97, pi. 21 (adult 



male) (not synon.). 

 The anterior part of ike snout is abruptly contracted into a narrow, 

 thin appendage ; the width of the interorbital space is one-third or 

 one-fourth of the distance of the eye from the end of the snout. The 

 anterior profile (from the snout to the angle of the pectoral fin) is 

 deeply undulated. Teeth with a pointed keel, in about 46 series in 

 the upper jaw. The outer pectoral angle is a right one. Body 

 smooth above ; a conical spine in front and behind the eye ; no spines 

 on the back ; lower part of the snout covered with minute asperities. 

 Tail with three series of S2'>ines. The width of the disk is much more 

 than the distance from the end of the snout to the hind margin of the 

 ventral fin. Pectoral fins generally with a blackish margin. 

 Coasts of Europe. 



* Of course this cannot bo usod as a generic character ; in many specimens of 

 typical Raja it is not more developed than in this species. 



VOL. VIII. * - H 



