422 SYNOPSIS. 



a point, and armed towards the base with a long, sharp, ser- 

 rated spine. 



Sp. 245. T. pastinacea. Sting Ray. Body rounded, the 

 broadest part of the pectorals somewhat angular ; snout 

 sharp, but scarcely projecting ; colour of the surface dirty 

 yellow, tinged with blue in the middle, under side white ; 

 tail and spine dusky. Cuv. Reg. An.; Yarr. Brit. Fisk. 9 

 ii. 588. Raia pastinacea, Linn., Penn. Biit. Zool., iii. 

 p. 125 ; Don. Brit. Fish., pi. 99. 



GEN. CXX. MYLIOBATIS. Tail very long and slender, hav- 

 ing a small dorsal near the base, and armed with one or more 

 serrated spines ; head projecting beyond the pectorals and 

 partly disengaged from them, the front obtuse. 



Sp. 246. M. aquila. Eagle Ray. Pectoral fins wing-like, 

 subtriangular ; head depressed, vertex nearly square ; tail 

 once and a half as long as the body ; colour of the surface 

 uniform olive-green, smooth ; ventral surface whitish. 

 Cuv. Reg. An. ; Yarr. Brit. Fish., ii. 591. Raia aquila, 

 Linn. White Ray, Penn. Brit. ZooL, iii. p. 128. 

 GEN. CXXI. CEPHALOPTERA. Body depressed, head trun- 

 cated in front, and having a membrane on each side projecting 

 like a horn ; tail very long, with a fin, and armed with a ser- 

 rated spine. 



Sp. 247. C. Giorna. Horned Ray. Body smooth, of an in- 

 digo-blue colour above, dingy white beneath ; margins of 

 the fins straight ; horns of one colour ; flagelliform tail 

 smooth for one-fourth of its length, then tuberculated ; 

 serrated spine very long. Risso., Ichth., p. 14 ; Cuv. Reg. 

 An.; Yarr. Brit. Fish, ii. 595. 



FAM. XXX. Petromyzid(p. Fam. of Lampreys. Body elon- 

 gated and cylindrical^ ike skeleton soft and almost mucilaginous; 

 mouth circular, placed beneath the head and opening by a longi- 

 tudinal fissure ; branchiae purse-shaped, fixed, opening by several 

 apertures; no pectorals or centrals. 



GEN. CXXII. PETROMYZON. Each side of the ncek with 

 seven branchial openings ; lip circular ; the inside of the mouth 

 furnished with tooth-like tubercles ; a loose fold of the skin on 



