23 



Hos et uoget mindre Individ, hvis Totallængde v;ir 

 50'"'". og som var optaget Hosten 1878 fra 180 Favnes 

 Dyb ved Rissen i Trondbjemsfjorden at' Conserv. Storm, 

 og som blev mig tilsendt til Undersøgelse. var Straale- 

 antallet følgende: D. 19 (6 + 13); A. lO; P. 15— 17; 

 C 12. Individet, som opbevares i Videnskabernes Selskabs 

 Samling i Trondlijem, svarede iøvrigt ganske til de øvrige 

 Individer (med Undtage.lse af den ringe Afvigelse i Straale- 

 antallet), og er nærmere omtalt i Forb. Vid. Selsk. Clira. 

 1879. No. 1. p. 11. 



Sideli)iic. Denne, der var usynlig bos det 15 '"'" lauge 

 Typ-Exemplar. er tilstede bos de større, og frembæver sig 

 som en opbøjet Stribe mellem Hudens tætte Beklædning af 

 BeutoiTie. Porerne, der blot er 10 i Antal, ere dog saa 

 smaa, at de kun med nogen Vanskeliglied lade sig forfølge 

 i deres bele Ra'kke. Sidelinien udspringer ved Gjielle- 

 laagets øvre Ende. stiger strax i skråa Retning ned mod 

 Ijegemets Midtliuie. som den naar noget bagenfor Analeus 

 Begyndelse. og lober derfra udeii yderligere S;enkning ud 

 til Caudaleii. 



Ijangs Roden af UnderkjVeveu stra'kker sig paa bver 

 Side en Række af 3 dybe Porer ; en lignende Række løber 

 laugs Overrandeu af Overkjæveu. ligesom enkelte Porer 

 tindes langs den nedre Rand af Praeoperculum. Skjæg- 

 traade paa Kjæverue mangle. 



Hudens Beklædning. Huden er næsten overalt tæt 

 bekbedt med Smaagrupper af yderst tine Bentorne, der 

 især paa Legemets Overside sidde saa tæt, at de næsteu 

 ikke lade uogeu glat Del af Huden tilsyne. Hver Gruppe 

 bar ber en rundagtig Omkreds. og er sammensat af.omtr. 

 10 Bentorne. der ere yderst lave, saa at Huden blot faar 

 en ru Overtlade. Lige saa tætte og af samme Omfang ere 

 Toruegrui>perue paa Gjællelaagene, medens de paa den øv- 

 rige Del af Hovedets Overside have mindre Omkreds, og 

 staa mere spredte. Ligeledes ere de uoget mindre paa 

 Legemet nedenfor' Sidelinien. 



Paa det egentlige Bugparti mangle disse Beu- 

 tornegrupper næsten ganske bos det største Individ (c), saa- 

 velsom paa hele Hovedets Underside; hos det næststørste 

 Individ (h. Totall. 136"'") vare de langt færre og mindre 

 paa Bagsiden, og manglede ganske paa Hovedets Underside ; 

 derimod vare Orupperne lios det mindste af dt^ nyerlioldte 

 Individer (o. Totall. 93""") tilstede overalt paa disse Le- 

 gemsdele lige ben til Underkjævespidsen, og lige saa tæt, 

 som oventil. Hos det tidligere beskrevne Yugel-Exemplar 

 (Totall. 15'"'") vare Beutoruene blot komne tilsyne jiaa Ho- 

 vedets Overside, og vare i Frembrud paa Bugsiden, men 

 endnu ikke fremkomne paa de øvrige Legemsdele. Heraf 

 synes at kunne udledes, at Ujevnhederne paa Legemets 

 Underside, der fremkomme tidligere, end paa (Jversiden, 

 afslides næsten ganske, inden Individerne have uaaet sin 

 fulde Størrelse. 



Paa Finnerne gaa Beutoruene ud langs Straalerne 

 lige til Randen af Dorsalen; i^aa Pectoralerne beklæde de 

 bovedsagelig de øvi'e Straaler, ligesom paa Caudalen. Der- 



In a comparatively small-sized exanijde (total length 50'"'"), 

 taken in the autumn of 1878. at a depth of 180 fathoms, near 

 Rissen, in the Drontheim Fjord. Ity conservator Storm, aud 

 . kindly sent me for examination, tlie tin-ray formula 

 may be thus stated: D. 19 (6 + 13); A. 10; P. 15—1.7; 

 C. 1 2. This individual, preserved in the collection of the 

 Videnskabernes Selskab in Droutheim. corresponded in every 

 respect with the other individuals (setting aside the slight 

 disagreement -in the number of tin-rays), and is more fully 

 described in- Forh. Vid. Selsk. Ciira. 1879. No. 1, p. 11. 



Lateral Line. — The latei'al line, of which tbere was 

 not eveu a vestige in the typical and very young specimen 

 (total length 15"""), is distinctly obvious in the larger ex- 

 amples, as an elevated series between the osseous den- 

 ticles of the skin. Tbe pores, not more than lO, are, 

 however, so small that some difficulty is experienced in 

 tracing them throughout tbe entire length of the series. 

 Tlie lateral line commences at tbe upper extremity of the 

 gill-cover, strikes off in an obli(|ue direction, and reaches 

 the mesial line a slunt distance from the conunencemeut of 

 tbe anal, jjassiug from thence straight to the caudal. 



Along tbe base of the lower jaw, on either side, is 

 a row of three deep pores; a similar series extends along 

 the suj)erior margin of the. upper jaw. and a few pores 

 occur too along tbe inferior margin of tbe preoperculum. 

 Cirri on jaws wanting. 



The Skin. — The skin is almost entirely covered with 

 small clusters of granulations, so closely disposed, more 

 particularly on tbe upper surface of tbe body, as hardly to 

 leave any smooth portion visible. Each cluster is circular 

 in form, and composed of about 10 spiculæ, exceedingly 

 depressed, giving to the skin merely a rough, or slightly 

 prickly feel. On tbe opercles, tbe clusters or groups are 

 disposed in like manner; on the rest of the surface of the 

 .head they present a more scattered appearance, the cir- 

 cumference of each being considerably less. They are 

 somewhat smaller, too, on the body below the lateral line. 



In the abdominal region, as well as on the entire surface 

 of the head, tbere is scarce a vestige of these clusters in 

 the largest specimen (c) ; in tbe specimen next in size • (b, 

 tqtal length 136""'") they were smaller and far less numer- 

 ous in the abdominal region, and altogether wanting on 

 the under surface of tbe head; on tbe other band, in the 

 smallest of the individuals newly ohtaiued {a. total length 

 93'"'") they occurred everywhere on those parts of the body, 

 exteucUng to the extremity of tbe lower jaw, and as closely 

 (bsposed as on the upper surface. The fry-specimen before 

 described (total length 15'"'") bad denticles on tbe upper 

 , surface of tbe head only, they were developing on tbe ab- 

 dominal surface; on tbe rest of tbe body they had not yet 

 begun to appear. From these data inay be inferred that 

 the asperities on tbe under surface of the body, which 

 develop e;irlier .than on the upper, to a great extent get 

 worn away before tbe tish has attained its fiill size. 



(Ju the fins,- the denticles extend along tbe rays to the 

 upper margin of the dorsal ; on the pectorals, they chiefly cover 

 tbe rays of the upper part, as also on the caudal. Tbe under 



