the TromVijem Fiord. 279 



48. Anceiis inaxillaris, Montagu. 

 Found clown to 100 fathoms. 



49. yEffa ventrosa, M. Sars. 



IS-^S. -^a vfintrosa, M. Sars, " Overs, af do i den norske-arct. Region 

 forekoin. Krebsdyr,"' Videiisk.-Selsk. Forhaud. Christ. l'-*")8, p. lo6. 



1879. /E(/a ventrosa, 8chii>dto and Moiiu'i-t, '*8yinb. ad Moiiof,'. Cymo- 

 thoarum, I. /Egida)," Naturhist. Tidss. '6 Rtekko, vol. xii. p. 375, 

 pi. ix. figd. 7, 8. 



Four specimens, amons^ Alcyonarians and corals on the 

 precipices at Rodberg. Tliis species is only as yet known on 

 the Norwegian coast. The type was taken in Oxfjord, Fin- 

 mark, and though rare — Schiodte and Meincrt record twelve 

 specimens in all — it has been found in several places thence 

 to the Christiania Fiord. I may add to recorded habitats 

 near Lervig, in the Hardanger Fiord, where I took two 

 specimens in 1879. 



50. Idotea marina^ Linn^. 



= I,trici(spidata, Desma.rest, = I. pelac/ica, heach, = Oniscus balthicus, 

 'P&\\as,=.Stenosoma irrorata, S&Y,=Idotea Basteri, Audouin,=/(5?oiea 

 varieyata, Roux. 



Rodberg. I have this species from Sicily, from the Adri- 

 atic, and from all parts of the British coast ; West Norway 

 generally, and up to Vadso, East Finmark, and from the 

 N.E. American coast. 



It is subject to great variation as regards the form of the 

 telson : — 



a. The sides slope away without any angulation to a con- 

 siderably produced central point. This is a common state in 

 the young, but is sometimes preserved to full maturity. 



h. The telson is markedly angled at that part whence the 

 sides begin to slope away to the produced apex. 



c. The angles just spoken of are produced into more or less 

 acute points, which, however, are much shorter than the 

 central apex. This is typical /. tricuspidata^ Dcsmarest. 



d. The extremity is very broad, somewhat produced and 

 widely rounded at the sides, witii a small central point, which 

 is scarcely, if at at all, longer than the lateral lobes. All 

 the specimens I have seen from the Mediterranean, that 

 is from Sicily and the Adriatic, are referable to this variety or, 

 possibly, species. It is a form which I have never seen in 

 the north, and is /. Basteri^ Roux. 



Miers, in his " Revision of the Idoteidge " (Journ. Linn. 

 Soc. vol. xvi. 1881, p. 31), has considered the North-east 

 American Idotea described by Harger under the name Idotea 



