73 



under den (i 1860) opstillede Slægt LeptoUetmms,^ hvilken' 

 ban senere i 1 864 • characteriserede væsentlig- i Overens- 

 stemmelse med Reinhardt. 



Paa det sidstnævnte Sted opforer han ved Siden af 

 LepioMennius yderligere en ny Slægt. CentroMennms, for 

 hvilken Richardson's Limqyemis mihihis (Last Aret. Voy. 

 vol. 2. 1855) udgjorde Tjqjen. Men Forskjellen mellem 

 (hsse 2 Slægter. som væsentlig er grundet paa en ringe 

 Ulighed i Strå alen ntallet. er af ganske specifik Natur, og 

 LcptohJennius bør derfor neppe engang anerkjendes som 

 Underslægt.' 



Ved UndersOgelsen og Beskrivelsen af Individer fra 

 de forskjellige vidt adskilte Localiteter, som denne Art 

 bebor, er der jevnlig bleven lagt speciel Vægt paa'Charac- 

 terer, der ere hentede fra ■ Hovedets og Legemshøjdens 

 Forhold til Totallængden, et Forhold, der hos denne Art 

 er særdeles betydelige Forandringer underkastede under 

 Individernes Væxt. L. lampetraeformis. der har været kjendt 

 i næsten et Aarliundrede. har derfor hyppig været mis- 

 kjendt. og modtaget et stort Autal forskjellige Navne, idet 

 de for den oiirindelige L. lanqjetraeformis opgivne Charac- 

 terer blot passe iud paa Individerne af et bestemt Alders- 

 trin (nemlig det uoget over halvt udvoxede). Jeg har alle- 

 rede v.ed en tidligere Lejlighed berørt dette Forhold i 

 ,. Norges Fiske- (Tillægshefte til Forh. Vid. Selsk. Chra. 

 1874. p. 72). 



•I 1776 blev Arten første Gang kjendeligt beskrevet 

 og afbildet af Mohr i hans ,.Islandske Naturliistorie" (p. 84) 

 fra Island, dog uden paa dette Sted at erholde noget Arts. 

 navn. At Mohr har havt denne Art for Øje. og ikke nøgen 

 anden af de grønlandske Former, synes bl. a. at fremgaa 

 af hans Angi\else af Straaleantallet. Et Artsnavn (Blen- 

 nhts Jampetraeformis) erholdt den først i 1792 afWalbaum 

 i den nye Udgave af Artedi's Genei-a Pischmi (tom. 3. p. 

 184), hvor Mohr's Beskrivelse og Tegning gjengives. 



I 1801 erholdt samme Mohr's Art yderligere et nyt 

 Navn af Schneichn-. i haus Udgave af Bloch's Si/stema 

 Ichthyologiae, og under dette Navn har Dr. Gunther op- 

 taget Arten i sin Gat. Fish. Brit. Mus. (Stirhaem island i cus). 



Den islandske Form blev fremdeles i 1837 gjort til 

 Gjenstand for Behandling, nemlig af Kroyer. der (Nat. 

 Tidsskr. 1 R. 1 B.) beskriver et fra Island nedsendt Individ 

 under Navnet Bhnnkis Jampeiraeformis. men foreslaar til 

 Slutning søm en mere passende Benævhelse CJhms mohrii 

 (et Navn, som dog Kroyer selv ikke senere har adopteret). 



I den Beskrivelse af ..Blennrus lunipenns'' , Lin., som 

 Faber giver i 1822 i sin ..Naturgesch. Fische Islands'' (p. 79), 

 sammenblandes saavel i Beskrivelsen, som i Synonymien 

 Mohr's Art med Fabricius' Blennhis himpenus fra Grøn- 

 land (= Lnmpenus fahricii, Reinh.); dog kan det sees, 

 at Faber neppe kan have kjendt nogen af Arterne af- 

 Autopsi. 



At Walbaum's Bl. Jampetraeformis fra Island er iden- 

 tisk med Stuwitz's Blennhis ■gracilis fra Norges Vestkyst 



' Opstillet for Storer's Blennius serpentinns. 



Den norske Nordhavsexpedition. Collett; Fiske 



Fishes occurring on the north-eastern coast of North Ame- 

 rica under the genus Leptoblennhis (established 1860^), 

 which he afterwards (1864) characterized much the same as 

 Reinhardt. 



Along with Leptohletinins, Prof. Gill iuti-oduced into 

 his Catalogue a new allied genus. CenfroUennius, Richard- 

 son's Lumpemis imhilus (Last. Arct. Voy. vol. 2. 1855) 

 furnishing the type. The characteristic distinction between 

 these two genei'a, founded principally on a slight inequality 

 in the number of the fin -rays, is however strictly specific; 

 and hence Lepfohlennius can hardly be entitled to rank 

 even as a sub-genus. 



Now. when e.xamining and describing individuals from 

 the numerous and widely distant localities inhabited by this 

 species, particular importance has usually been attached to 

 chai'acters resting on tiie proportion which the head and 

 depth of the body bear to the total length; and this pro- 

 portion in the present species is found to vary very con- 

 siderably with the growth of the fish. Hence L. lanqietræ- 

 formis, known to ichthyologists for the space of a century 

 almost, has frequently been misapprehended, and has been 

 given a large number of synonyms, tlie characters originally 

 believed to belong to L. lampefraformis being those of 

 individuals arrived at a particular stage of growth (a little 

 more than half- grown). On a former occasion I called 

 attention to thiS fact, viz. in "Norges Fiske" (Tillægshefte 

 til Forh. Vid. Selsk. Chra. 1874, p. 72). 



In 1776. the species was first described and figured 

 with couiparative accuracy, by Mohr, in "Islandske Na- 

 turhistorie'' (p. 84), but without his assigning a specific 

 name. That it was this sjjecies Mohr had before him. and not 

 one of the otlier Greenland forms, seems evident from the 

 fin-formula given. A specific name (Blennius lampetræfor- 

 mis) was first suggested, in 1792, by Walbaum. in his edi- 

 tion of Artedi's Genera Piscimn (torn. 3, p. 184). accom- 

 panied by Mohr's diagnosis and representation. 



In' 1801. Mohr's species had a new synonym given 

 it. by Schneider, in his edition of Bloch's Systema Iclitliyolo- 

 giæ; and this name Dr. Giinther has adopted in his Cata- 

 logue Fish. Brit. Mus. (Sfichæus islandicus). 



This Icelandic form was made the subject of further 

 treatment by Kroyer. who (Nat. Tidsskr. 1 R. 1 B.) de- 

 scribes an example sent from Iceland by the name of Blennius 

 lampetræformis. proposing, however, at the close of his paper. 

 as a more appropriate designation, CI inns mohrii: but the 

 latter synonym was not afterwards adopted by Kroyer himself.- 



In the description of Blennius Imnpenus, Lin., given 

 by Fal)er (1822) in his "Naturgesch.' Fische Islands" (p. 

 79), Mohr's species and Fabricius's Blennius lumpenns from 

 Greenland (i. e..Luinpenus fabricii. Reinh.) are confounded 

 throughout, both as regards the description and the synon- 

 ymy; it is evident, however, that Faber can have known 

 nothing of either species from autopsy. 



That AValbaum's Bl. lampetræformis, from Iceland, is 

 identical with Stuwitz's Bl. gracilis, from the west coast of 



For Storer's Blcnnms serpcntinns. 



10- 



