Recent and Foatiil Furainluifera. 285 



ITI. In 1859, Prof. D. T. Ansted gave us a sample of the 

 " large deposit, chiefly of Foraniinifers in a mud, in deepish 

 water, and rather widely spread," off the coast of Guernsey*, 

 and probably the same as that alluded to by J. Gwyn Jeffreys, 

 Esq,, in the ^ Report of the British Association for 1865,' 

 Transactions of Sections, p. 183, as a bed with both recent 

 and fossil shells, at from 12 to 20 fathoms, among the Channel 

 Islands. Mr. J. Gwyn Jeffreys also kindly submitted some of 

 this sea-bed to our examination. 



Prof. Ansted's sample contained numerous fossilized Num- 

 mulites and other Foraminifera. The latter are all dense by 

 mineralization ; and most of the Nummulites also are minera- 

 lized by carbonate of lime (though not always solid), and are 

 much worn, or, at least, smoothed and even polished. The 

 list is as follows : — 



Nummulina Prestwichiana, Junes. \ one specimen of a still thicker 



Ilamondi, Defr. TruitcatuUna. 



Rouaulti, UArch. 8)~ Ilaime. \ Alveoliua Boscii (Defr.). Txvo 



Discorbina trocliidiformis, Lam. \ specimens. 



Planorbulina(Truiicatiiliiia) farcta, j 



var. Dutemplei (D'Orb.). And | 



In his Notice of the occurrence of certain Fossil Shells in 

 the Sea-bed adjoining the Channel Isles, 1865, it is stated : — 

 ^' In the course of his dredging-explorations this year among 

 the Channel Isles, Mr. J. Gwyn .Jeffreys found shells of 

 species some of which are extinct, and one is not known 

 to inhabit at the present the North Atlantic. They were 

 taken with living Mollusca at depths varying from 12 to 20 

 fathoms, and in different parts of the sea-bed. The speci- 

 mens in question had the same ap})earance as dead shells of 

 recent species ; one of tliem was in a most perfect state of 

 preservation, and evidently had not been rolled or transported 

 to any distance from its original place of habitation. They 

 consisted oi Pota mides tricarinatas.^ Lam., and P. cinctusXj^xi\. 

 (both Eocene fossils) , a species of Terebratula (or Terebratu- 

 lina) which Mr. Davidson referred with doubt to T. squamulosa 

 of Baudon (from the Calcaire g)-ossier), and Discorhina trochi- 

 difonnis of Lamarck is also an Eocene fossil, but larger than 

 specimens from the Bracklesham beds. No Tertiary deposit 



* In ' The Channel Islands ' by D. T. Ansted and R. G. Latham 

 (8vo, London, 1862), at p. 29o, it is stated that Dr. Lukis dredged some 

 specimens off the south-eastern extremity of Guernsey, and these are 

 referred to as haviug' been probably drifted from the coast of France. 

 "As there must be a strong and deep current [says Prof Ansted, in a 

 letter] setting every tide up-Channel and rounding the island of Guernsey, 

 it is not at all unlikely that they may have come from the water off 

 Ushant." 



