27 



Gymnacanthus patns, Cxill. Proe. Ac. Nat. Sci. Philail. ISCil. Supjil. p. 



4-2 (1801). 

 rhohctor ventralis, Malnigr. Sv. Exped. till Spetsb. och .Tan Mayon 



1803—64, p. 249 (1807). 

 Gymnacanthus tricuspU, Gill, Rep. Comm. Fish & Fisheries, 1871—7-2, 



p. 800 (1873). 

 Gymnacanthus pistilUger, Bean, Bull. U. St. Nat. Mus. No. l.i, p. 127 



(18791. 



Diagn. Rovedets Overside med chagrinartede Beti- 

 tornegmpiKr, Legemet seir næsfen gled. Sidelinien glat. ret- 

 løhende, med en Sænhmig ved Shdningen af 2den Dorsal, 

 har omir. 35 Porer. Hovedet mdehddes næsfen 4 Gange i 

 Totalh, har et Par stumiw Knuder over Øjnene, ingen i)aa 

 Panden eller Baghoredet. Praeopermlum har 4 Tome, den 

 øvre lang og stærh, oftest 3-tandet, hos yngre bredt 2-délt. 

 Pedoralen lang, Ventraleme hos Hannen lange. Farven 

 graahrnn med 3 større Rijg'pletter, og me)-e nregehnæssige 

 Pletter nedad Sideme; Finnerne med Tverhaand. Hannen 

 har hvide Pletter paa Bugen, samt Analpapille. Størrelsen 

 indtil 200'"'" (Hannen), eller 250'"'" (Hunnen). 



M.. B. G: 1 D. 11 (10 eller 12); 2 D. 15—17; A. 16—18 

 (19); P. 18 (19); V. 4; C. ijlljl. Lin. lat. 35. 



.Localit. fra Nordh. Exped. Spitsbergen. 



Bemærkninger til Beskrivelsen. De erholdte Exem- 

 plarer havde følgende Maal og Straaleantal : 

 Totallængde. Hovedets Længde. 

 20"-"' 

 21 - 

 22,5 - 

 26.5 - 

 31 - 

 29 - 



31 - 



32 - 

 Straaleantallet varierede saaledes hos de 8 Individer 



i Iste Dorsal mellem 10 og 11. i 2den Dorsal mellem 15 

 og 17. i Analen mellem 16 og 18. De 2 Dorsaler vare 

 hos enkelte fuldstændigt sammenstodende. medens de hos 

 de fleste vare fjernede fra hinanden ved et kort. men tjde- 

 ligt Mellemrum. 



Blot 2 af de erholdte Individer vare Hanner, og 

 havde en forholdsvis laug Analpapille. 



Hos de 2 mindste var Hovedet endnu glat, men hos 

 de større fandtes ovenpaa Hovedet og paa Praeoperculum 

 en Samling af fladtrykte ru Bentorne, hver omgivne (hos 



Gymnacanthus patris, Gill. Proc. Ac. Nat. Sci. Philad. ISOl. Suppl. p. 



42 (1801). 

 Phobetor ventralis, Malmgi'. Sv. Exped. till S]ietsli. och .lan Mayen 



1803—04, p. 249 (1S67).' 

 Gymnacanthus tricnspis, Gill. Rep. Coram. Fish. & Fisheries, 1871 — 72, 



p. 800 (1873). 

 Gymnacanthus pistilUger, Bean, Bull. U. St. Nat. Mus. No. l.">, p. 127 



(1S79). 



Diagnosis. — Upper surface of head with groups of 

 granulations: body almost smooth; lateral line smooth, 

 passing straight to termination of second dorsal, at that point 

 slightly dejieded, number of pores 35; length of head one- 

 fourth of total length : two obtrise prottd)erances above the 

 eyes, none on tlie sinciput or occipid ; preopercidum famished 

 with four spines, the uppermost long and potverfid, generally 

 tridmited, in younger examples broad, bidental : pectorals long ; 

 ventrals long, in the male; colotir greyish-brown, with three 

 large dorsal patches and mimerous spots down the sides; 

 fins traversed by transverse bands; abdominal surface spotted 

 with white, in the male, which is furnished 'with an anal 

 papilla. Length reaching 200'""> (nlale),.or 250'""' (female). 

 M. B. 6; 1 D. 11 (10 or 12); 2 D. 15—17: A. 16—18 

 (19): P. 18 (19): Y. 4: C. ijllji. Lin. led. 35. 



Locality (North Atl. Exped.): Spitzbergen. 



Descriptive Observations. — Dimensions of. aud 

 number of tin-rays in. specimens obtained. 

 Total Length. Length of Head. 1 



a. 

 b. 

 c. 

 d. 

 e. 

 f. 



g- 

 h. 



2 D. A. 



75 20 10 15 17 



76 - 21 - 10 16 16 



84 - 22.5 - 11 17 18 



99 -■ 26.5 - 11 16 18 



115 - 31 - 11 16 18 



116 - . 29 - .11 16 IS 



122 - 31 - 11 15 17 . 



123 - 32 - 11 15 17 

 The number of tin-rays in the 8 examples varied 



accordingly: — 1st dorsal, between 10 and 11; 2nd dorsal, 

 between 15 and 17 ; anal, between 16 and 18. In one 

 or two of the specimens the dorsals were contiguous, in 

 most however separated, the space between, though short. 

 being distinctly obvious. 



Two only of the specimens obtained were m.ales. and 

 had a rather long anal papilla. 



In the two smallest individuals the head was as yet 

 perfectly smooth; but the frontal region and the preoper- 

 cidum of the largest were furnished with a cluster of depressed 



