102 SCANDINAVIAN FISIIKS. 



Genus SARDA. 



Bodij riiiind (oid fnsiform or someidnit compressed or elongated. The scales of the hodi/ form a corslet in the 

 2)reabdominal region. Dorsal fins onhj a little apart, tlie anterior part of the first heinq -not at all or only slightlji 

 elevated and forming an even, convex or slightly concave continuation of the Jiind part of the upper margin of the 

 fin: the second, which is generally lon-er than the first", being for the most part situated in front of the anal, to n-hich 

 it is similar in other respects. Height of the anal greater tlian its base. Finlets behind the dorsal and anal fins 

 from 7 to !K Pectoral fins set near the middle point in the height of the body. Length of the ventral usually 

 under S % of the length of the body''. Length of the head less than half the distance between the tip of the 

 snout and the second dorsal fin. Eyes small, the adipose lid but little developed. The preorbital bone does not 

 conceal the broad, posterior part of the upper jair-bone irhen the mouth is closed. Jaw-teeth comparatively large. 

 On each side of the tail a nal-ed, hnig and high, longitudinal middle carina, and at the extremity of the tail 

 two smaller, scaly carince., which converge posteriorly. I'yloric appendages numerous, and sometimes united into 



a glandulous mass. 



Subgenus ORCYNOPSIS. 



Body behind the corslet naked {without distinct scales). Height of the anal fin nearly 10 {9'. 5 to 9' 8) % of the 

 length of the body. Jjengtli of the ventral fins a little more than half {from .54 to 56 %) of the height of the 

 anal and about "/.-, {from 40 to 42 %) of the length of the pectoral. L^ength of the head, as ivell as the distance 

 between the tip of the snout and the first dorsal fin, less than ^j ^ of the lent/tJi of the body. Length of the pec- 

 toral fins generally more than half {from ,57 % to HI %) the length of the Jtead: length of the ventral less than or, 

 at most, equal to ^'4 of the length of the head. Palatine bones and vomer tvith teeth. 



Of the subgenus Orcynopsis only two species are I to doubt tlie distinctions Ijetweeu them given by the 

 known, or perhaps only one, as there is good reason | authors. 



" 111 Ofojnopsis unicolor, according to Moreau, the posterior dorsid fin is liigber tliau the anterior, as in the specimen of this species 

 which we have been able to examine, in whicli, however, the rays of the iirst dorsal are bent and somewliat damaged. Still Moreau's spe- 

 cimen, as well as ours, was stuifed, a circumstance which inclines me to rely on Collett's examination of perfect specimens preserved in 

 spirits, tliough tlie possibility of a difference in this respect due to sex or age cannot be denied. 



' According to Steixdachner, the length of the ventral fins in Sarda cliilieiisis goes as high as nearly 13 fi of the length of the body. 



