38 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



1/5. K. p rod u < t us Ayrea. 



Tiic anterior nasal valve is dilated into a very narrow lateral ibid, 

 scarcely projecting beyond the nasal margin. The length of the nostril 

 is slightly more than its distance from the lateral margin of the head 

 and more than the distance bet \\eeii the inner angles of the nostrils, and 

 much less than the width of the mouth, which is very slightly arched. 

 Snout produced, the distance between the outer angles of the nostrils 

 being ; <! that between the mouth and the end of the snout. A series 

 of small, depressed, polished spines along the median ridge of the back; 

 groups <f small, polished tubercles on the orbital margin and on the 

 shoulder. A broad groove between the rostral ridges, which are sepa- 

 rated along their entire length. Snout lighter colored than the rest of 

 the bo: 1.x ." (Streets.) Coast of California and southward. 



(A.vn-s MSS.; cinml, Pirn-. Ac. Nat. Sci. Phila. 1*>1, 196; Streets, Bull. U. S. Nat, 

 Mu- \ii. l-77.r.."): Rhinobaiua leucorhynchua GttntheT, viii. -144.) 



SUPER-FAMILY TORPEDINOIDEA. 



( The Torjx'dinoltl h'tti/x.) 



FAMILY XIX. TORPEDINID^E. 



(The \nnih-jittlien.) 



Rays with the trunk broad and smooth: the tail comparatively short 

 and thick, with rayed caudal lin. and commonly two rayed dorsal fins 

 the first of which is over or behind the ventrals; a longitudinal Ibid on each 

 side of tail: anterior nasal valves confluent into a quadrangular lobe ; 

 an electric organ composed of hexagonal tubes between the pectoral 

 fins and the head. (ieneraii; species about 15 ; large rays, noted for 

 their power <!' giving electric shocks : found in most seas. (Torpedin'nhc 

 (liinther. viii. I IS-l.Vi.) 



" l><>]-:il lin- iv.n: \i-ntr;ils M'paiutr ; s|iir;irli-s \\cll behind the ryes ____ TOKPKDO, lili. 



36. TOKPEI>O niuiirnl. 



i 1 iimii'i il, Y.><\. Anal.vl. |>. Id 1 . 1 : i\pr /.'nin l<>i-i><-il<> L. ) 



ric i.i\> u ilh the disk very broad, aliruptly contracted at the 

 tail : two dorsal iin- : caudal fin well developed ; ventral fins large, sepa- 

 rate: spiracles lar.^e, placed behind thee\cs; mouth small; teeth pointed; 

 -kin peri'eciK -mootli. l.ar-e rays, chiefly inhabiting the Atlantic. 



