BRITISH ASSOCIATION MEETING AT NEWCASTLE. 



459 



heads near the eye, and notice the point in the hillside where the line 

 P P falls ; pace to the spot, and note down the number of steps. Start 

 afresh from that point to the next similarly determined, and again noting 

 the number of steps ; and so 



on. Thus on your note-book 

 you will have entered a series 

 of numbers ; and that, in 

 each of the intervals so noted, 

 you have ascended by the 



height of your own eye above ~ & 

 the point at which you start- 

 ed. Should the hillside be too steep to pace it, a measuring tape may be 

 used. By ruling on a piece of paper parallel lines at the distance of t ne 

 height of your eye to the scale you wish to use, it is extremely easy to 

 lay down the contour of the hill from these notes. 



I remain, Sir, faithfully yours, 



O. Fisher. 



Elmstead, Colchester, November 3rd, 1863. 



BRITISH ASSOCIATION MEETING AT NEWCASTLE. 



(Continued from p. 395.) 



ON SOME FOSSIL AND RECENT FORAMINIFERA COLLECTED IN 

 JAMAICA BY THE LATE MR. LUCAS BARRETT, F.O.S. 



By Peofessoe T. Rupeet Jones, F.G.S., and W. K. Paekee, Esq. 



In 1862 Mr. L. Barrett, F.G.S., late Director of the Geological Survey 

 of the West Indies, gave Messrs. Jones and Parker some fossil and recent 

 Foraminifera from Jamaica, comprising a few new forms — some that were 

 previously but little known, and some in finer condition of growth than 

 usual. The recent specimens, from their ascertained habitats, illustrate, 

 to some extent, the conditions under which the fossil forms were deposited. 



One sample of these fossil Jamaican Foraminifera consisted of several 

 specimens of Amphistegina vulgaris, and another of a few of the same 

 species, with one Textularia JBarrettii (a new variety of Textularia). No 

 locality nor geological horizon was indicated for these. A third sample, 

 from " South Hall Cliff," consisted of two large specimens of Vaginulina 

 legumen. Fourthly, a much larger series of Foraminifera, from the 

 " Pteropod-marl " of Jamaica, affords Nodosaria JRaphanistru?n, Denta- 

 lina acicula, Vaginulina striata, Frondicularia complanata, Cristellaria 

 calcar, C. cultrata, C. rotulata, C. Italica, Orbitolina vesicularis, Buli- 

 mina ovata, Cuneolina pavonia, Vertebralina striata, and Lituola Sol- 

 danii. These, however, can be regarded only as an incomplete Ehizopodal 

 fauna. 



From the recent Foraminifera obtained by the late Mr. Barrett from 

 different sea-zones, between 15 and 250 fathoms, on the Jamaica coast, 

 we learn that Amphistegina. vulgaris, Textularia Barrettii, Dentalina 

 acicula, Frondicularia complanata, Cristellaria?, and Lituola Soldanii in- 

 dicate at least 100 fathoms, and probably more, as the depth at which 

 the Pteropod-marl and the Amphistegina-beds were deposited in that 

 region. Pteropods are found in some sea-muds at similar depths. 



Of the recent Jamaican specimens (evidently only the larger and more 



