444 Bibliographical Notice. 



Patella vulgata. In the genus Littorina, L.fabalis and L. palliata 

 are referred to Littorina obtusata (L. littoralis, F. & II.), and Lit- 

 torina tenebrosa, L. saxatilis, and L. patula are grouped, as Forbes 

 and Hanley suggested they probably should be, under L. rudis. 



Several Mollusca of much interest are added to the British fauna 

 in the present volume. 



NecBra rostrata, Spengler, a form which ranges from the ^Egean 

 and Mediterranean seas to the coasts of Norway and Sweden, is ad- 

 mitted on account of a single right valve, dredged in seventy-six 

 fathoms forty miles from the east coast of Shetland. 



Teredo pedicellatay Quatrefages, inhabits fir and oak used in sub- 

 marine and fixed woodwork in the Channel Islands. 



Lepeta cceca, Midler. A single specimen has been dredged in the 

 Shetland seas, and a second off the west coast of Scotland. 



Trochus amabilis, Jeffreys. A very beautiful new species, disco- 

 vered among " fine sand, mixed with gravel, in 85 to 95 fathoms, 

 about twenty-five miles N.N.W. of Burra Firth Lighthouse, Unst. 

 The area in which it occurs appears to be limited to a few square 

 miles. I discovered this new and beautiful species in 1861, whde in 

 company with my friend Mr. Waller ; and we obtained specimens 

 again in 1864 by dredging on the same ground. Living together 

 with it were Limopsis aurita, Oylichna alba, Buccinopsis Dalei var. 

 eburnea, and other treasures. I do not know any other place, at 

 home or abroad, where it has been found." 



Trochus Duminyi, Requien. Found among shell-sand at Bun- 

 doran, in Donegal Bay. This is a Mediterranean species, and was 

 first described as a fossil by Philippi, under the name of Valvata 1 

 striata. It was recorded as British by Mr. Jeffreys, in his "Addi- 

 tional Gleanings in British Conchology " in the 'Annals ' of Sep- 

 tember 1859, as Skenea striata. 



Although not prepared to acquiesce in all the changes which have 

 now been enumerated, yet with the greater part of them we entirely 

 agree, and shall only here call attention to two of the points in 

 which we venture to entertain a different opinion from that which 

 is maintained in the book before us. 



We must enter a strong protest against the uniting of Pandora 

 obtusa with its ally P. incequivalvis. Mr. Jeffreys gives the fol- 

 lowing reasons for the course which he has adopted in treating 

 the former as a variety of the latter species : — " The difference be- 

 tween the typical shell and the variety obtusa apparently arises from 

 the nature of their respective habitats — the one being sublittoral, 

 and the other belonging to deeper water. An intermediate form has 

 been taken byCailliaud on the coast of Brittany, and by M 'Andrew 

 at Corunna. On a superficial view, indeed, it would seem as if a 

 valid distinction existed in the length from the beak to the front mar- 

 gin being always greater in P. incequivalvis (or rostrata), and on 

 the posterior side in P. obtusa ; but this only shows that varieties, 

 as well as species, have some character of their own. Such may 

 be expected when the conditions of life vary. The extension of 

 the posterior side in the typical form may be caused by the differ- 



