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rare through the Hebrides and in Zetland. Pecten nebulosus, 

 likewise a common fossil of the same district, is now only to 

 be found living in any number in a particular spot near the 

 head of Loch Fyne, though dead shells are to be met with in 

 the greatest abundance in various districts where a single -live 

 individual is of rare occurrence. Pecten icelandicus, fossil 

 in the same beds as the last, has probably become recently 

 extinct in our seas, as there is no living specimen on record, 

 though I have procured it dead in various localities from the 

 Clyde to the north of Zetland. 



" Nucula pygniEea, a prevailing and characteristic fossil of 

 the drift, and now living in Greenland, is found alive in the 

 sea surrounding the Isle of Skye, but in no other of the 

 Scottish coasts. Nucula oblonga and N. truncata, supposed 

 to be extinct in Britain, I have dredged dead in the same 

 locality. The neighbourhood of Skye is also remarkable as 

 the only known Scottish habitat of area raridentata, and tere- 

 bratida cistellula, recently discovered living, but before known 

 as fossils of the red crag ; also a beautifid new comatula, sup- 

 posed to be an inhabitant of Norway. 



" Before concluding, I will once more say a few words upon 

 a subject to which my attention has been for some time 

 directed, namely, the best means of preserving animals and 

 preparations. 



" Not having been very successful in the use of Goadby's 

 solutions, I last summer engaged the services of Mr. Goadby 

 himself, who accompanied me on a cruize of three months. 

 Unfortunately this gentleman was in a bad state of health, and 

 what was most particularly to be regretted, liis vision was 

 affected to such a degree that he was unable to decipher ordi- 

 nary printing or writing, much less accomplish any of those 

 beautiful preparations, in which he had previously been so 

 eminently successfid. The objects we procured were, in con- 

 sequence, only preserved roughly as stores; but even so, under 

 all disadvantages, they are declared by Professor Owen, Car- 



