LUMPEN US. 
225 
body and the distance from the snout to the beginning 
of the anal tin, all diminish with 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 
tin 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 change of growth 
which is important as an explanation of the structure 
of this fin in the kindred species 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 with 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 ray, 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 species. 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 the development of the genus. 
THE SHARP-TAILED LUMPENUS (sw. spetsstjertade langebarnet *). 
LUMPENUS LAMPRETIFORMIS. 
Plate XI, fig. 5. 
No vomerine or palatine teeth. Length of the maxillary hones less than s / 10 of that of the head. Distance between 
the anal fin and the tip of the snout less than 2 / 5 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. hr. 6; D. 68—74; 
C. x + 1 1 1. 12 + x. 
1 
A. ; 
48—51 
P. 15 1. 14; 
V. 
i 
3 
Syn. Tan ybrosme No. 4, Str5m, Sondm. Beskr., I, p. 315; Blen- 
nius capite Icevi, radiis pinnce dorsalis pungentibus , Mohr, 
Islands Natnrhist., p. 85, tab. IV. 
Blennius Lampreti forints, Walb., Ichth. Art., part. Ill ( lumpretce - 
forints , p. 184; lampretcefovmis, p. 700; Lampreti formis, p. 
702), tab. 3, fig. 6 (ex Mohr); Kroy. ( Clinus ), Naturh. Tidskr. 
Kbhvn, ser. 1, vol. I, pp. 32 et 31 = Clinus Mohrii, p. 38; Id. 
( Lumpenus ) ibid., ser. 3, vol. I, p. 287; Esm., Skand. Naturf. 
Mode, Christ. 1868, p. 523; Coll., Forh. Vid. Selsk. Christ. 
1874, Tillsegsh., p. 72; Id., Norsk. Nordh. Exped., Zool., 
Fislce, p. 71; Mela, Vert. Fenn., p. 291, tab. IX; Lii.lj., So., 
Nnrg. Fiskar, I, p. 507 ; Jord., Gilb., Bull. U. S. Nat. Mus., No. 
16, p. 779; Day, Proc. Zool. Soc. Loud. 1884, p. 445, tab. 
XLI ; Petersen, Vid. Meddel. Naturh. For. Kbhvn 1884, p. 156. 
Centronotus islandicus, Bl., Syst. Ichth., ed. Schneid., p. 167; 
Cuv., Val. ( Gunellus ), ITist. Nat. Poiss., vol. XI, p. 433; 
Gthr ( Sticliceus ), Cat. Brit. Mus., Fish., vol. Ill, p. 281; 
Malm {Lumpenus), Gbgs, Boh. Fn., p. 470; M6b., Hcke 
( Stichoeus ), Fische d. Osts., p. 60. 
Blennius lumpenus ' { p. p.), Faber, Fische Islands, p. 79; 
Nilss. ( Centronotus ), Prodr. Ichth. Scand., p. 104; Kroy. 
{Blennius), Naturh. Tidskr., ser. 1, vol. I, p. 519. 
Clinus nebulosus , Fries, Vet. Akad. Hand]. 1837, p. 55; Kroy. 
{Lumpenus), Damn. Fiske, vol. I, p. 336; Lillj., Vet. Akad. 
Handl. 1850, p. 333; Ekstr. {Clinus), Gbgs Vet., Vitt. Samh. 
Handl. 1850, p. 38; Malm, ibid., p. 90; Nilss. {Lumpenus), 
Skand. Fn ., Fisk., p. 195; Gill {Centroblennius), Proc. Acad. 
Nat. Sc. Philad., 1861, App., p. 45; Loven, Ofvers. Vet. 
Akad. Forh. 1861, p. 291; Mgrn, ibid. 1864, p. 524; Bren- 
ner, Not. Sails. Fn., FI. 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; Kroy. {Lumpenus), 
Naturh. Tidskr., ser. 3, vol. I, p. 282; Gill {Leptoblennius), 
Proc. Acad. Nat. Sc. Philad. 1864, p. 210; In., 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 150 mm. 
long the greatest depth of the body is about 6 '8 % of 
° On examination 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. Malmgren, 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 Lump, medius. From Krgyeu’s minute descriptions it also seems probable 
that Lump. Fabricii is only the older form of the same species as Lump, medius. 
b Nilsson, 1. c. Lilljeborg, following StrSm, gives this species the name of Tangbrosme. 
c According to Collett’s measurements of an Icelandic specimen in the Museum of Copenhagen. 
Scandinavian Fishes. 
29 
