SCANDINAVIAN FISHES. 



genus those Pacific forms which are distinguished by 

 the persistence, even in adult specimens, of small and 

 pointed jaw-teeth, set in several rows. With this de- 

 finition the genus Fleuronectes contains some twenty 

 species, several of which, however, must still be re- 

 garded as imperfectly known. 



The five species that belong to the Scandinavian 

 fauna may be distinguished as follows: 



.4; Vertebnc more than 45; rays of 

 the dorsal fin more than 85, of 

 the anal fin more than 70: Sub- 

 genus Glyptocephahts. 



Least depth of the tail less 



than 8 % of the length of the 



body. Length of the lower 



jaw at least about -,3 of the 



least depth of the tail. Anal 



spine present. Kays of the 



ventral fins (J Pleuronecfcs ci/no<jlos,<itn. 



Least depth of the tail more 



than 8 % of the length of the 



body. Length of the lower 



jaw at most about '/j of the 



least depth of the tail. Anal 



spine wanting. Rays of the 



ventral fins 5 Fleuronectes niicroceplialus. 



a: 



B: Vertebra; less than 45; rays of 

 the dorsal fin at most 85, of the 

 anal less than 70: Subgenus 

 Fleuronectes. 



a: Lateral line of the abdominal 

 region distinctly arcuate. 

 Length of the postorbital 

 part of the head less than 



14 %" of that of the body.. Fleuronectes limmvhi. 

 h: Lateral line of the abdominal 

 region straight or only slightly 

 curved. Length of the post- 

 orbital part of the head more 

 than 14%'' of that of the body. 

 ua: Vertebrie more than 40. 

 Rays of the anal fin more 

 than 46. Length of the 

 peduncle of the tail at 

 the dorsal or the ventral 

 edge less than V3 of the 

 postorbital length of the 



head - Fleuronectes platessa. 



bh: N'ertebrae less than 40. 

 Rays of the anal fin less 

 than 4(j. Length of the 

 peduncle of the tail at the 

 dorsal or the ventral edge 

 more than ',3 of the post- 

 orbital length of the head Fleuronectes flesus. 



THE POLE (SW. SKARFLUNDEAN OK .TYDETUNG.iN). 



FLEURONECTES CYNOGLOSSUS. 

 Plate XIX, fig. 3. 



Bodij comparativehi elongated, like that of the <SV)/r. the gieatest depth hehifi itsnalh/ from SO % to 36 % of the 

 length. Dorsal and aval fns with especially nmneroas rays, the former eoiitaiiiiiig about 100 — 112 and the latter 

 about 90—100 rays. Least depth of the tail less than 8 96 (aboat (>-.5—7%) of the length of the body. Length 

 of the head less than 18% {about 17—15 %) (f .that of the body, and the distance between the anal fin and the 

 tip of the snout less than 25% {about 24 — 19%) of the latter. Postabdominal bone {first interhcemal spine of the 

 anal fin) projecting down/cards and forwards, in the form of a spine, behind the rent. Rays of the ventral fins, 

 as a rule, (>. Blind side of the head and the preopercular margin of the eye side cavernous, on account of the 

 large muciferous hollmes beneath the skin. Lateral line almost straight. Vertebra' about 50. Jatv-teeth close-set 

 incisors, about half as many {9 — 12) on the eye side as on the blind side {22—24); pharyngeal teeth straight and 

 cylindrical, set in a single row on each of the si.r upper pharyngeals, and in a double row on each of the two 

 lower ones. Coloration of the eye side grayish russet with grayish blue fins; pectoral fin partly black. 



R. br. 7; 1). 100—115'-; A. 87 — 100''; P. 10—12; V. G'; 

 C. x+\A: 1. lO' + .j'; Lin. lat. 128—130; Vert. 56—58. 



Syn. Fleuronectes (Cyiwtjlossus, >Scharretoiig), GnoNuv., Mtis. Tchth., 

 vol. I, p. 14, No. 30; vol. II, p. 11. 



Fleuronectes Cynojjlossus, Lin., Syst. Nat., ed. X, toin. I, 

 p. 269; Fries, Vet.-Akad. Handl. 1838, p. 166; Nilss., 

 ,Sk-and. Fn., Fish., p. 623; Gthr, Cat. Brit. Mus., Fish., 

 vol. IV, p. -140; Coll., Forh. Vid. Selsk. Christ. 1874, 

 Tilliogsh., p. 147; ibid. {Olyptocephaltis) 1878, No. 14, p. 



" As a rule less than 13 %. 



'' As a rule more than 15 °,i. 



' Sometimes 95, nccording to Collett; sometimes 117, according to Gottsche, or 120, according to Goode and Bean. 



'^ Sometimes 86, according to Collett, sometimes 102, according to GoTTSCHE. 



' Sometimes 5, according to Gottsche. 



■'■ In a specimen from llalifa.x (N. S.) tlicre arc 19 l)ranclied rays in Oic candal tin, Ijiil only .'! snpporting rays above and 2 below. 



