151 



PleuroncHcs nigromanus, Nilss. Proib'. Ichth. Scand.. p. ."i,"i ^183'i). 

 Ghjptoeephalus saxicola, Gottsclie, Wiegiii. Arch. f. Xaturg. 1S3."), I B., 



p. 156 (1835). . , 



Platessa pola, Jen. Man. Brit. Vertobr. Anini., ]i. 4.'iS (ls:l.'i). 

 Platcssa elongata, Yarr. Suppl. to Brit. Fish., p. ? (IS:!9|; Hist. Brit. 



Fish. ed. 2, vol. 2, p. :MS (1S41). 

 Platessa saxicola, Kx. Danm. Fiske, 2 B., p. 338 (1843 — i->). 

 Ghjptocephalus ci/noglossus. Gill, Proc."Acad. Nat, Sci. Philad. 187:'), p. 



.560 (1873). 

 Glyptocepkalus acadianus. Gill, Proc. Acad. Nat. Sci. Philad. IS7:'. ii. 



• -3(10 (1873). 

 Glyptocepkalus elongatus, Gill, Proc. Acad. Nat. Sci. Philad. 1873, ]i. 



362 (1873). 

 Pkniouectes elongatus, Day, Proc Zool. Soc. Lo'nd. 18711, p. 7."i.'i, PI. 



LXI 1 18791. 



Diagn. Legemet gJat : clefs Højde indeholdes hos yngre 

 liidirider 4. lios ældre ^' Gange (eller derunder), Hovedets 

 Lcengde o'-^ til S^ji Gange i Totallængden. Tænderne 

 paa Øjensiden 6 — 13 i Over-, 7—14 i Underkjæven, paa 

 BUnds/deii 17 — 26 i Orer-, 19 — 28 i Underkjæven. Le- 

 gemet skjælheklædt indtil Øjnenes Forrand; Finnerne ligeledes 

 mere eller mindre- skjælbeklædte. Interorhitalrummd smalt, 

 med ophojet Kjøl. Øj^me store, indeholdes 3 — -3'/^ Gange i 

 Hovedets Lcengde; det nedre Øje Ugger Yj Øjenlængde foran 

 det ørre. Ånaltorn tilstede. Pecforalen paa Blindsiden ikke 

 forlænget. Ensjarvet rødagtig graa : Blindsiden hos de ældre 

 mer eller mindre mørk/arvet. Pedornlrn ima Øjensiden i 

 sin y eire Halvdel sort. 



M. B. 7. D. 110 (95—120); A. 95 (87—102); 

 P. 10—11 (9—14); C. 23 (18—26); V. 6. 



Localit. fra Nordh. Exped. Lofoten; Tanaljord i 

 Finniarkeu. 



Bemærkninger til Synonymien. Gl yptocvphcdus cy- 

 noglossus er, som det synes, Slægtens eneste Repræseutant 

 i de atlantiske Have, efterat Gl. acadianus, Gill, fra Nord- 

 Americas Østkyst har vist sig ikke at være artsforskjellig 

 fra Gl. cgnoglossus. Først i det stille Hav (California) op- 

 træde 2 andre, i afvigte Aar (1880.) af Lockington be- 

 skrevne Arter. 



Det yngste af Nordbavs-Expeditioneus Individer, bvis 

 Totallængde var 212""" (8i/.., eng. Tomme), tilhører øjen- 

 synlig det Stadium af Arten, hvori den af engelske Natur- 

 forskere er opstillet som en egen Art under Navn af Pleu- 

 ronectes elongatus- (Yarr.). Efterat denne Form, hvoraf blot 

 enkelte ' Individer bidtil have været omtalte, alle fra de 



Pleuronectea nigromauus, Nilss. Prodr. Ichth. Scaml., p'. 55 (1832). 

 Glyptocepkalus , saxicola, Gottsche, Wiegm. Arch. f. Naturg. 1835, 1 K., 



p. 156 (1835). 

 Plati>.sa pola, Jen. Man. Brit. Vertebr. Aiiim., |). 458 (1835). 

 Platessa tlomjata, Yan'. Suppl. to Brit. Fish., p. ? (18:10); Hist. Brit. 



Fish. ed. 2, vol. 2, p. 318 (1841). 

 Platessa saxicola, Kr; Danm. Fiske, 2'B., p. 338 (1S4:'> — 45). 

 Glyptoeephalus cynoglosms. Gill, Proc. Acad. Nat. Sci. Philad. Is7:), p. 



360 (1873). 

 Glyptocepkalus acadianus. Gill, Proc. Acad. Nat. Sci. Philad. ls7:'., p. 



360 (1873). 

 Glyptoeephalus elongatus. Gill. Proc. Acad. Nat. Sci. Philad. 187;!, p. 



3ti2 (1873). 

 Plfuronectes elongatus, Day, Proc. Zool.' Soc. liOnd. 1879, p. 755, PI. 



LXI (1879). 



Diagnosis. — Body smooth; its depth., in young in- 

 dividuals is to toted length as 1 to 4. in adults as 1 tc) 3 

 (or less); length of head as 1 to o'-ji — 0^/4. Teeth on' 

 coloured side in the ■ upper jaw 6 — 13, in the loiver 7 — 14 ; 

 on the blind side _ in the upper jaw 17 — 26, m the 

 lower 19—28. Body scaled to the anterior margin of the 

 eyes; the fins likewise more or less covered xvith scales. Inter- 

 orbital space narrow, with a sharp ridge; the eyes large, their 

 diameter being to the length of the head as 1 to 3 — 5'/,.,- the 

 lower eye aboid one-third' of its diameter in advance of the 

 iipper. Preanal spine present. Tlie pectoral on the blind side 

 not produced. Colour riifous bromi; the blind side in adtdts 

 more or less tinged with the same colour. Outer half of 

 pectoral on the coloured side black. 



M. B. 7. D. 110 (95—120); A. 95 (87—103); 

 P. 10—11 (9—14); C. 23 (18—26); V. 6. 



Locality (North Atl. Exped.): 

 Tana Fjord (Finmark). 



Lofoten ; the 



Bemarks on the Synonymy. — Glyptoeephalus cyno- 

 glossus is appaj-ently the only species of the genus inhabit- 

 ing the Atlantic Ocean, Gl. acadianus. Gill, from the east 

 coast of North x\merica, having been shown to be speci- 

 fically distinct from Gl. cyiioglossus. Two other species 

 (described by Lockington in the current year [1880,]) occur, 

 however, in the Pacific (coast of California). 



The youngest of the specimens taken on the Exjjedi- 

 tion, total length 212""" (S^j-, English inches), obviously re- 

 presents the stage of development in which GL cynoglossus 

 has been referred by English naturalists to a separate spe- 

 cies, under the name of Pleuronede's elongatus (Yarr.). This 

 form, of \\hich up to the present time a few specimens 



