LUMPENUS. 



225 



body and the distance troni the snont to the beginning 

 of the anal fin, all diminish witli age; in proportion to 

 the length of the body, the caudal part of which in- 

 creases most during growth. It also appears from his 

 tables of measurements that the length of the caudal 

 fin undergoes even relative increase in proportion to 

 the rising length of the body", even if this increase be 

 inconstant and insignificant. The rays of the anal fin, 

 according to Malmgren, undergo a cliange of growth 

 which is important as an explanation of the structure 

 of this fin in the kindred sjiecies and genera as well. 

 "The division of the points, of which we can find no 

 trace in the smallest specimens, begins in the last rays 

 of the fin — those which are nearest to the caudal 



fin — and advances Avith the growth of the fish towards 

 the beginning of the anal fin." That the lower rays 

 of the pectoral fins are subject to a similar change, 

 seems probable from the circumstance that in the largest 

 specimens from Spitzbergen only the two or three lowest 

 rays, in addition to the uppermost ra,)', are simple at 

 the point. We must certainly expect to find corre- 

 sponding alterations in the other species belonging to 

 this genus, when they are better known, and therefore 

 be cautious in our distinguishing of new spetdes. Herein 

 we may also find a clue to the explanation of the re- 

 lations between the two species observed in Scandina- 

 via, and regard them as representatives of different 

 stages in tlie development of the genus. 



THE SHARP -TAILED LUMPENUS (s\v. spetsstjeutade langebaknet'). 

 LUMPENUS LAMPRETIFORMIS. 



Plate XI, fig. 5. 



No vomcriiir or paJatine teeth. Lenc/th of the maxiUaiy bones less tJian Vio of that of the head. Distance l>ettveen 

 the anal fn and the tip of the snout less than Vs of the length of the body. Number of rays in the dorsal fin 

 more than 67, in the anal fin more than 47. Pectoral fins evenly rounded; caudal fin sharply rounded or pointed. 



E. hi: G; D. 68—74; A. ; P. 15 1. 14; V. '/il 



48—51 " 



a. ,r+ 11 1. 12+,c. 



Si/n. Tangbrosme No. 4, StE(jm, Soiidm. Beskr., I, p. 315; Bleii- 



niiis capite Icevi, radiis pinnce dorsalis pungentibus, Mohb, 



Islands Natitrhist., p. 85, fab. IV. 

 Blennius Lampretiformis, Walb., Iclith. Art., part. HI (lumpreta;- 



forviis, p. 184; lampretcpformis, p. 700; Lampretiformis, p. 



702), tab. 3, fig. 6 (exMoHR); Kr0Y. (^Climes), Naturli. Tidskr. 



KbhvD, ser. 1, vol. I, pp. 32 et Zl^Clinus Mohrii, p. 38; Id. 



(Liimpenus) ibid., ser. 3, vol. I, p. 287; EsM., Sliand. Naturf. 



Mode, Christ. 1868, p. 523; Coll., Forh. Vid. Selsk. Christ. 



1874, Tillsegsb., p. 72; Id., Norsk. Nordh. Exped., ZooL, 



Fiske, p. 71; Mela, Vert. Fenn., p. 291, tab. IX; Lillj., So., 



Nnrg. Fiskar, I, p. 507; Jobd., Gilb., Bull. U. S. Nat. Mus., No. 



16, p. 779; Day, Proo. Zool. Soc. Lond. 1884, p. 445, tab. 



XLI; Peteesen, Vid. Meddel. Natiirb. For. Kblivn 1884, p. 156. 

 Centronotus islandicus, Bl., Syst. Ichth., ed. Schneid., p. 167; 



Cuv., Val. {Gunelhis), Hist. Nat. Poi.-is., vol. XI, p. 433; 



Gthb {Stichmts), Cat. Brit. Mus., Fish., vol. Ill, p. 281; 



Malm {Lumpemis), Gbgs, Boh. Fn., p. 470; MOb., Hcke 



{Stichcens), Fische d. Osts., p. 60. 



Blennius lumpenus (p. p.), Fabee, Fische Islands, p. 79; 



NiLSS. {Centronotus), Prodr. Ichth. Scand., p. 104; Kb0Y. 



(Blennius), Naturh. Tidskr., ser. 1, vol. I, p. 519. 

 Clinus nebulosus, Feies, Vet. Akad. Handl. 1837, p. 55; Kboy. 



{Lumpenus), Danm. Fiske, vol. I, p. 336; Lillj., Vet. Akad. 



Handl. 1850, p. 333; Ekstb. (Clinus), Gbgs Vet., Vitt. Samh. 



Handl. 1850, p. 38; Malm, ibid., p. 90; Nilss. (Lumpenus), 



6'kanil. Fn., Fisk., p. 195; Gif.h (Centrnhlennius), Proc. Acad. 



N.it. Sc. Philad., 1861, App., p. 45; Loven, Ofvers. Vet. 



Akad. Forh. 1861, p. 291; Mgbn, ibid. 1864, p. 524; Bren- 



NEE, Not. Sails. Fn., Fl. Fenn. Forh. 1871 — 1874, p. 463. 

 Blennius gracilis, Stuwitz, N. Mag. Naturv., Christ. 1838, p. 



406, tab. Ill; Reinh. (Clinus), Dansk. Vid. Selsk. Naturv. 



Math. Afh., Deel 7 (1838) p. 194; Kb0Y. (Lumpenus), 



Naturh. Tidskr., ser. 3, vol. I, p. 282; Gill (Leptoblennius), 



Proc. Acad. Nat. Sc. Philad. 1864, p. 210; Id., Smiths. 



Misc. Coll., N:o 283, p. 19. 



The Sharp-tailed Lumpenus attains as great a length 

 as 412 mm.'. In full-grown specimens the body is 

 extraordinarily elongated; in specimens about L50 mm. 

 long the greatest depth of the body is about 6 '8 % of 



" On e.xainination of these tables of measurements, and on comparison of the specimens belonging to the Royal Museum of Lumpenus 

 medius with those of Lump. Fabricii, which are determined by Prof. Malmgben, the conclusion forces itself upon us that, in these ma- 

 terials at least, we can find no ground for distinguishing between the species. We have failed to find any confirmation of the statement 

 that the breadth of the forehead is less in Lump. Fabricii than in Luiiip. medius. From Kroyee's minute descriptions it also seems probable 

 that Lump. Fabricii is only the older form of the same species as Lump, medius. 



* NiLSSON, 1. c. LiLL.iEBOEG, following Strum, gives this species the name of Tangbrosme. 



' According to Cullett's measurements of an Icelandic specimen in the Museum of Copenhagen. 



Scandhiaviau Fidltes. ""^ 



