36 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Mcasurcineids of typical specimen. 



(jf,,. , United States Katioual Mnsoum.) 



Extreme len-tli 11.50 inches. 



Leugth to base of ciuulal lin 9.90 iuclie8= 1.00 



Greiite.st f h^ptli '*^ 



Least depth ^^^ 



Length of caudal pedunch- 0^^» 



Length of head ^"^ 



Width of interor))ital area 017 



04 



10 



Length of snout ■ 



Length of nnxxillai-y ■ 



Length of mandible H 



Diameter of orbit ^^^ 



Distance from snout to dorsal ^^^ 



Length of base of dorsal ''^ 



Greatest height of dorsal , -1" 



Distance of anal from snout '^'^ 



Length of base of anal -^^ 



Height of longest ray 11 



Length of caudal 1'^ 



Length of pectoral (right side) .24 



Length of veutrals ^^^ 



The typical example of this species was taken on a hook on the west 

 side of the island of Santa Catilina, Los Angeles Connty, California. 



OESCKIPTIOX OF A NEW KAY (S»BLi ATYKMIIVA TRISEBIATA), FROM 

 THE COAST OF C AI.BFOBIVIA. 



BY DAVID S. JORDAN AND CHARL.ES H. C^ILBERT. 



PLATYRHINA TRISERIATA. 



Disk broad-ovate, broader than long ; the snout very blnutly rounded, 

 not projecting ; the angle formed anteriorly by the pectorals very ob- 

 tuse; anterior margins of the pectorals slightly convex ; tail stout, in 

 form intermediate between i^aia and Bhiiiohatit)^, its width at base about 

 equal to the length of the snout and a little more than the interorbital 

 width ; tail much longer than the disk, not unich depressed, its sides 

 vertical, its lower lateral edges with broad horizontal fold, a slight 

 groove above on each side of the median series of spines. 



Dorsal fins similar, higher than long, the anterior far behind the end 

 of the claspers ; the posterior free margin of both fins very convex, not 

 forming an angle. Caudal flu large, well developed both above and 

 below, its outline entire, elliptical. Ventral fins with their margins en- 

 tire, the claspers well developed. Pectoral fins extending forward to a 

 point but little short of the tip of the snout. 



Eostral ridges wide apart at base, rapidly convergent, inclosing a tri- 

 angular area ; a slight translucent sjoace separates this from the opaque 

 pectorals ; e^es small, wide a])art, the broad spiracles close behind them. 



