Recent and I^ossil Foraniiiiifera. 285 



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

 " large deposit, chiefly of Foraminifers 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 w^ith 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 Prestwicliiaua, Jones. 1 one specimen of a still thicker 



Ramondi, Defr. Truncatulina. 



Rouaulti, ly Arch. 4" Haime. Alveolina Boscii {Defr.). Two 



Discorbina trochidiformis. Lain. \ specimens. 



Planorbulina (Truncatulina) farcta, j 



var. Dutemplei (I)' 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 knoAvn 

 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 appearance as dead shells of 

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

 preservation, and evidently had not been rolled or transported 

 to any distance from its original ])lace of habitation. They 

 consisted oi Potmm'des tricarinatu!>., Lam., and P. ci'ncfus.l^am. 

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

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

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

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

 specimens from the Bracklcsham beds. No Tertiary deposit 



♦ In <The Channel Islands' by D. T. Ansted and II. G. J.atham 

 (8vo, Loudon, 18G2), 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 having been probably drifted from tlie coast of France. 

 "As there must be a strong and deep current [says Pn)f. Ansted, in a 

 letter] setting every tide up-CJiannel aud rounding the island of Guerusev, 

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

 Ushant." 



