488 'Sir. J. (iwyn JeftVey."' on Norwegian Molhtsca. 



error ; for Hope's description pays notliiiiG; ahout tlic elytra 

 bcinLr Hattened. All that lie, says rep^ardijig- them is, " Elytris 

 viridibus, ad apiccm abruptc truncatis ct sub lentc subtilissime 

 punctatis." In other points my specimens agree ■with Mr. 

 Jlo])e's description: but it is very short, and I cannot think he 

 Avould have overlooked the comjiaratively strong punctation 

 (uniler the lens) on the basal ])ortion of the elytra, had it been 

 present in his species. Certainly the description of the elytra 

 as " subtilissime " punctate under the lens does not a])ply to 

 elytra which are so only towards the apex. My own antici- 

 pation is that my species will turn out to be the same as 

 Hope's ; but his description does not warrant my acting on this 

 supposition. I find myself therefore constrained to follow the 

 course taken by M. Chevrolat, and treat it as distinct until it 

 be shown to be the same. 



[To be continued.] 



LI. — Xorii-egiaa MoUusca. By J. GwYN JEFFREYS, F.R.S. 



A FEW hours' dredging last autumn at Drobak, in Christiania- 

 fiord, produced results of such interest that I am induced to 

 publish a list of the Mollusca which I then procm-ed. Drobak 

 IS a " classical " place, in consequence of the discoveries made 

 there, now almost a century ago, by that great zoologist, Otho 

 Frederick ^Miiller. Dr. George Ossian Sars was my kind guide 

 and companion, and assisted me in the work. The depth at 

 which we dredged was from 40 to 60 fiithoms ; and it Avas in 

 some places so close to the shore that littoral species were 

 mixed with those from deepish water. Dredging in a Nor- 

 wegian fiord is a very different matter from dredging on the 

 coasts of Great Britain. The former can be managed easily 

 between breakfast and dinner, in an inland sea resembling a 

 river, which is frequently as smooth as a mill-pond and has 

 a considerable depth. In the middle of Sognefiord, and Avithin 

 a mile from the land, there is a depth of 661 fiithoms. On the 

 other hand the 100-fathom line is more than thirty miles from 

 any part of our own coasts ; and the open sea there is always 

 more or less agitated, often rough, and sometimes dangerous. 

 A list of the Christianiafiord [Mollusca was published in 

 1846 by Herr Asbjomsen; and Dr. G. O, Sars has within the 

 last month edited a further list, which was prepared l)y his 

 lamented father shortly before his death. I should not have 

 thought it necessar}', or even have presumed, to ofter the pre- 

 sent contril)ution, exce])t for the bcdief that a few remarks on 

 certain species, especially with respect to tlieir geographical 



