80 REPORT—1863. 
A Synopsis of the Bivalved Entomostraca of the Carboniferous Strata of Great 
Britain and Ireland. By Professor T. Rurrrr Jonus, F.G.S., and J. W. 
Krirxsy. 
After a review of what former observers have published on the Bivalved Entomos- 
traca of the Carboniferous formations, the authors proceeded to point out—Ist, a 
few rather doubtful Cyprides or Candone, from the Coal-measures, 2ndly, Cytheres, 
of which there are about eight species, chiefly from the Coal-measures. 3rdly, 
Bardia, about eight species, mostly from the Mountain-limestone and its shales. 
Athly, Cypridinide, comprising Cypridina, Cypridella, Cyprella, Entomoconchus, and 
Cytherella, from the Mountain-limestone: a fine collection of these rare forms from 
Little Island, Cork, liberally placed at Messrs. Jones and Kirkby’s disposal by 
Mr. Joseph Wright, well elucidate the relationships of these hitherto obscure 
genera and their species. 5thly, Leperditide, comprising Leperditia (to which genus 
belong the so-called Cypris Scotoburdigalensis, C. inflata, C. subrecta, Cythere tn- 
ornata, and others, many of them dwarf varieties of one species, and mostly belong- 
ing to the Mountain-limestone series) ; Zntomis (Mountain-limestone), Devonian 
and Carboniferous forms of which have been mistaken for Cypridine; Beyrichie 
(from nearly all parts of the Carboniferous system), several species, of which 
B. arcuata, Bean, sp., is the most common; and Kirkbye, somewhat rare, and 
chiefly from the Mountain-limestone series. 
Leperditia and Beyrichia are also Silurian and Devonian genera; they do not 
appear to pass upwards into the Permian formation. Bairdia and Kirkbya occur 
first in the Carboniferous and reappear in the Permian deposits, even in the same 
specific forms; and Bairdia has been freely represented in Secondary and Tertiary 
deposits, and exists at present. Of the Cypridinide under notice, Cypridella, 
Cyprella, and Entomoconchus appear to be confined to the Mountain-limestone ; 
Cypridina occurs in the Permian, and, with Cytherella, is found in Secondary and 
Tertiary rocks and in the existing seas. Entomis is a Silurian and Devonian 
genus, especially characterizing the so-called Cypridinen-Schiefer of Germany. 
Notes on some Fossil and Recent Foraminifera, collected in Jamaica by the 
late Lucas Barrett, F.G.S. By Professor T. Rurerr Jonzs, F.G.S., and 
W. K. Parxer. 
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 the Fossil Jamaican Foraminifera consisted of several specimens 
of Amphistegina vulgaris; and another, of a few of the same species, with one Zea- 
tularia Barrettit (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 Raphanistrum, 
Dentalina acicula, Vaginulina striata, Frondicularia complanata, Cristellaria calear, 
C. cultrata, C. rotulata, C. Italica, Orbitolina vesicularis, Bulimina ovata, Cuneolina 
pavonia, Vertebralina striata, and Lituola Soldanii, These, however, can be regarded 
only as an incomplete Rhizopodal fauna. 
From the Recent Foraminifera dredged by the late Mr. Barrett from different 
sea-zones, between 15 and 250 fathoms, on the Jamaican coast, we learn that Am- 
phistegina vulgaris, Textularia Barrettii, Dentalina acicula, Frondicularia complanata, 
Cristellarie, and Lituola Soldanii indicate at least 100 fathoms, and probably more, 
as the depth at which the Pteropod-marl and the Amphistegina-beds were de- 
posited in that region. Pteropods are found in some sea-muds at similar depths, 
