460 
THE GEOLOGIST. 
conspicuous members of a rich Ebizopodal fauna), some were taken 
at from 15 to 20 fathoms, namely, Quinqueloculina aciglutinans, Q. piil- 
chclla, Orhiculina comjjressa, and O. adunca ; some at from 50 to 100 
fathoms, namely, Orhiculina compressa, Dentalina acicula, and Orhitolina 
vesicularis ; and several others at from 100 to 250 fathoms, namely, Denla- 
lina acicula, D. commu?iis, Cristellaina rotulata, C. cultrata, C. calcaVy 
Frondicularia complanata, Ampliistegina vulgaris, Polytrema miniacea, 
Biffenerina nodosaria, Verneuilina tricarinata, Textutaria trochus, T. 
Barrettii, Cuneulina pavonia, Lituola scorpiurus, and L. Soldanii. 
CuneoUna, a rare form, hitherto known only by figures, and description 
given by D'Orbigny, proves (as suspected) to be a modification of Textu- 
laria ; and T. Barrettii is intermediate between it and Textularia proper. 
The Frondicularice are remarkably large and beautiful ; and the Cristel- 
larice and Bentalince are also large and relatively abundant. 
This fauna is almost identical with the fossil Forarainifera of the Ter- 
tiary "Pteropod-marl" of Jamaica, above mentioned, specimens from which 
also were given by the late Mr. Barrett in 1862 to the authors of this notice. 
ON THE BIYALVED ENTOMOSTEACA OF THE CARBOXIFEEOUS 
STEATA OF GEEAT BEITAIN AND lEELAND. 
By Peofessoe T. Ettpeet Jones, F.G-.S., and J. W. Kiesby, Esq. 
{Read lefore the British Association^ at Neiocastle, September, 1863.) 
After a review of what former observers have published on the Bivalved 
Entomostraca of the Carboniferous formations, the authors proceeded to 
point out — 1st, a few rather doubtful Cyprides or Candonce, from the coal- 
measures. 2ndly, Cytheres ; of which there are about eight species, 
chiefly from the coal-measures. 3rdly, Bairdice ; about eight species, 
mostly from the mountain-limestone audits shales. 4thly, Cypridinidce ; 
comprising Cypridina, Cypridella, Cyprella, Entomoconchus, and Cythe- 
rella, 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 relation- 
ships of these hitherto obscure genera and their species. 5thly, Leper- 
ditidce; comprising Leperditia (to which genus belong the so-called Cypris 
Scotohurdigalensis, C. ivjlata, C. suhrecta, Cythere inornata, and others ; 
many of them dwarf varieties of one species, and mostly belonging to the 
mountain-limestone series) ; Entomis (mountain-limestone), Devonian 
and Carboniferous forms of which have been mistaken for Cypridince ; 
Beyrichice (from nearly all parts of the Carboniferous system), several 
species, of which B. arcuata, Bean sp., is the most common; and Kirk- 
hyce, 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 
KirTchya 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 CypridinidcB 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 existing seas. Entomis is a Silurian and Devonian genus, 
especially characterizing the so-called " Cypridinen-Schiefer " of Germany. 
