488 2\h'. J. Gwyn Jeffreys on Norioegian IsIoJhif<ca. 



error ; for Hope's description says nothing iibout tlie elytra 

 being flattened. All that lie says regarding- them is, " Elytris 

 viridibus, ad apicem abrupte truncatis et sub lente snbtilissime 

 pmictatis." In other points my specimens agree with Mr. 

 Hope's description : but it is very short, and I cannot think he 

 would have overlooked the comparatively strong punctation 

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

 present in his species. Certainly the description of the elytra 

 as " snbtilissime " punctate under the lens does not apply to 

 elytra which are so only towards the a]:)ex. My own antici- 

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

 Hope's ; but his description does not v»^arrant 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 coutiuued.] 



LI. — Norwegian Mollusca. By J. GwYN Jeffeeys, F.E.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 procured. 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 fathoms ; and it was in 

 some places so close to the shore that littoral species Avere 

 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 within 

 a mile from the land, there is a depth of 601 fathoms. On the 

 other hand the lOO-fatliom 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 Asbjornsen; and Dr. G. O. Sars has within the 

 last month edited a further list, Avliich was prepared by his 

 lamented father shortly before his death. I should not have 

 thought it necessary, or even have presumed, to offer the pre- 

 sent contribution, except for the belief that a few remarks on 

 certain species, especially with respect to their geographical 



