44 



Fam. Agonidae. 



GJ-en. Agonus, Schneid. 

 Bloch, Syst. Ichth., (ed. Schneid.), p. 104 (1801). 



10. Agonus decagonus, Schneid. 1801. 



PI. II, Fig. 11 — 12. 



f C'ottns catapkractm, Fabr. Fauna Groerd. No. 112, p. 155 (1780). 

 Agonus decagonus, Schneid. Bloch, Syst. Ichth. p. 105 (1801)'. 

 Aspidophoiiis decagomis, Cuv. & Val. Hist. Nat. Poiss. torn. 4, p. 223 



(1829). . 



Aspidophorus spinosissimus, Kr. Naturh. Tidsskr. 2 Række, 1 B. p. 



250 (1844). 

 Aspidophoiiis malarmoides, Deslongch. Mem. Soc. Lin. Norm. torn. 9, 



p. 167 (1853). 

 Leptagomas spinosissimus, Gill, Proc. Acad. Nat. Sci. Philad. 1861, p. 



167 (1861 1. 

 Archagonus decagomis, Gill, Proc. Acad. Nat. Sci. Philad. (teste Liitk.) 



Diagn. Legemet smalt, dets største Bredde indeholdes 

 8, Hovedets Længde 5 Gange i Total!. Det gjennnnsnitlige 

 Antal af Skjolde er: mellem Dorsalerne 4 Par ; fra Nakken 

 til Iste Dorsal 5 Par, indtil 2dm Dorsal 17 Par; mellem 

 Ventralerne og Analen 12 Par. Foran Ventralerne findes 

 23 — 25 Skjolde. Pectovalens Længde ubetgdeligt større, end 

 Hovedets. STcjægtraadene 5 paa liver Side, (4 enkelte i Mund- 

 rigrn, 1 kløvet fortil i Underkjceven). Sidelinien har 23 — 

 25 Porer. Et Par korte Tome paa Smulen, et Par Knuder 

 over Øjnew, og et, Par større Knuder paa Panden. Farven 

 graagul, med 2 — 3 større gradbrune Tverpletter ; Pectoralen 

 og Caudalen henimod Spidsen brunsorte. Hannen har læn- 

 gere Ventraler, end Hunnen., Størrelsen 'indtil 210 mm . 



M. B. 6; 1 D. 6 (5 ell, 7); 2 D. 6—7(8); A. 7 (6 ell. 8); 

 p. 14—16; V. 3; C. 2/IZ/2. Lin. lat. 23—25. 



Localit. fra Nordh. Exped. : Havet mellem Nordcap 

 og Spitsbergen. 



Bemærkninger til Synonymien. En udførlig Be- 

 skrivelse er givet, foruden af Cuvier og Valene. (Hist. Nat. 

 Poiss. tom. 4). af Krøyer i Naturh. Tidsskr. 2 Række 

 1 B., som i 1844 beskriver saavel det udvoxede Individ 

 (Aspidophorus decagomis), som Ungen (Aspidophorus spi- 

 nosissimus) som separate Arter, og afbilder begge i Gai- 

 mards Reise-Værk (Voyage Scand. Lap. etc. 1838—40, 



Fam. Agonidæ. 



Gren. .A-gcrnxxs, Schneid. 



Bloch, Syst. Ichth., (ed. Schneid.), p. 104 (1801). 



10. Agonus decagonus, Schneid. 1801. 



Pl. II, fig. 11 — 12. 



t Cottus cataphractus, Fabr. Fauna Grænl No. 112, p. 155 (1780). 

 Agonus decagonus, Schneid. Bloch, Syst. Ichth. p. 105 (1801). 

 Aspidophorus decagonus, Cuv. & Val. Hist. Nat. Poiss. tom. 4, p. 223 



(1829). 

 Aspidophorus spinosissimus, Ki\ Naturh. Tidsskr. 2 Række, 1 B. p. 



2r.il (1S44). 

 Aspidophorus malarmoides, Destongeh. Mém. Soc. Lin. Norm. tom. 9, 



' p. 167 (1853). 

 Leptagonus spinosissimus, Gill, Proc. Acad. Nat. Sci. Philad. 1861, p. 



167 (isiii). 

 Archagonus decagonus, Gill, Proc. Acad. Nat. Sci. Philad. (teste Liitk.) 



Diagnosis. — Body slender, greatest breadth to total 

 length as 1 to 8, lenr/th oj' head as 1 to 5. Normal, number 

 of shields: between the dorsals 4 pairs, from nuchal region 

 to 1st dorsal 5 pairs ; to commencement of 2nd dorsal 17 

 pairs.; between the .ventrals and the anal 12 pairs. Anterior 

 to ventrals 23 — 25 shields. Length of pectorals slightly 

 exceeding tltat of head. Five cirri on either side (4 at 

 the angle of the mouth, 1 cleft, out on the lower jaw). 

 Lateral line with 23 — 25 mucous pores. One pair of short 

 sjiiues on snout: above the eyes one pair of knotty protuber- 

 ances, and a pair, of larger size, on the front. Colour 

 greyish -yellow, relieved with 2 — 3 large transverse spots of 

 greyish -brown; points of pectorals and caudal brownish- 

 black; ventrals longest in male, Length reaching 2lO mm . 



M. B. 6. 1 D. 6 (5 or 7); 2 D. 6—7 (8); A. 7 (6 or 8); 

 P. 14—16; V. 3; C. 2J11/2. Lin. lat. 23—25. 



Locality (Worth Atl. Exped.) : — The open sea. 

 between the North Cape and Spitzbergen. 



Remarks on the Synonymy. — A full description 

 of this species has been given by Cuvier and Valene. 

 (Hist. Nat. Poiss. torn. 4) ; also by Kroyer (Naturh. Tidsskr. 

 2 Række. 1 B.). who. in 1844. described the full-grown 

 nsh (Aspidophorus decagonus) and the immature form 

 (Aspidophorus spinosissimus) as two species, both of which 

 he subsequently figured for Gaimard's work (Voyage Scand. 



