63 
very highly arched in nidarosiensis. Also the mouth shields are 
quite different in shape, distinctly broader than long in abijssicola, 
as long as broad in nidarosiensis. The ventral plates are also 
broader in abyssicola than in nidarosiensis. Then I have never 
seen an indication of selfdivision in any of the numerous specim- 
ens of abyssicola , that I have examined, while nearly every spec- 
imen of nidarosiensis shows selfdivision to have taken place more 
or less recently. — It may not be superfluous to State that these 
differences hold good also for small specimens of abyssicola , not 
larger than those of nidarosiensis. 
8. Amphilepis norvegica Ljungman. 
E. v. M a re n z e 11 e r in his memoir of the Echinoderms of the 
Eastern Mediterranean 1 ) gave reasons for regarding Forbes’ Am- 
phiura florifera 2 ) as the same species as Amphilepis norvegica 
Ljungman. This result has not met with a general acceptance. 
Grieg has accepted it in his paper on „Bukkenfjordens Echino- 
dermer og Mollusker “, 3 ) but in his later papers he always uses 
the name norvegica , and especially Koehler and H. L. Clark 
retain the name norvegica , the latter author, in his „Catalogue of 
Recent Ophiurans“ (p. 224) taking A. florifera Forbes as a syno¬ 
nym of Amphiura Chiajei. 
The question needs reexamination. First, it is certain that Arnph. 
norvegica does occur in the Eastern Mediterranean; that was shown 
definitely by Marenzeller; having myself got a pair of spec¬ 
imens from the Mediterranean, dredged by the „Thor“ at St. 134. 
15 /t 1910 (37° 37’ N. 10° 17’ E.) I can only confirm Maren- 
zeller’s statement; the Mediterranean form cannot be disting- 
uished from the Scandinavian, not even as a variety. Herewith, 
however, is not given the proof that Forbes’ florifera was really 
this species. Is it then only a young specimen of Chiajei , as main- 
tained by Ludwig, Lyman and Clark? The faet stated ex- 
pressly by Forbes, that it has only 3 armspines would seem to 
0 Berichte d Commission f. Tiefsee-Forschungen XVI. Zoolog. Ergebnisse 
V. Echinodermen, gesammelt 1893—1894. Denkschr. d. Ak. d. Wiss. Wien. 
LXII. 1895. p. 17. 
*) E. Forbes. On the Radiata of the Eastern Mediterranean. I. Ophiuridæ. 
Trans. Linn. Soc. XIX. 1843. p. 150. 
8 ) Stavanger Mus. Årsberetn. 1896. p. 38. 
