Wright — Recent Foraminifera of Down and Antrim. 103 
of selecting slack tides for dredging these parts, as otherwise the operations are 
certain to end in disappointment and failure. 
A table is appended of the stations from which the various gatherings 
were taken, with particulars of bathymetrical range, nature of sea bottom, 
weight of material brought up, and number of species found. As the quantity 
of material dredged varied greatly at different stations, it appeared desirable to 
record the weight collected at each place, so as to arrive at a correct estimate 
of the relative abundance of foraminiferal life at the various places. (1.) 
To my friend Mr. Henry B. Brady, F.R.S., I am deeply indebted for the 
kind assistance he has rendered me in the critical examination of the doubtful 
species ; and likewise to my friend Mr. William Swanston, F.G.S., for the accu- 
rate and artistic drawings in the plate which accompanies this memoir. 
The following Foraminifera deserve a passing notice, viz. : — 
Biloculina ringens, {Lamk.). 
Generally distributed at various depths. A variety of this species is not 
uncommon in deep water, small in size, and in contour approaching B. sphcera. 
Triloculina oblonga, {Montagu). 
Very abundant in Strangford Lough, where the specimens are large and 
typical ; in Belfast Lough it is rare, and the specimens usually small. 
Lituola globigeriniformis, P . and J. 
Not unfrequent in Belfast Lough and Strangford Lough; and it also occurs 
plentifully in Cork Harbour and Kinsale Harbour. 
Lagena sulcata, W. and J. 
The costae on this species are sharply defined, about every alternate one 
extending up the neck, round which they are usually somewhat twisted. 
Lagena costata, {Will.). 
This species differs from the last in being entosolenian; in full-grown ex- 
amples the shell is spherical, with the costae slightly raised and very regular, 
extending to near the neck, where they usually end abruptly, the remainder 
being smooth, as is also the neck, which is short. The texture of the shell is 
more glassy than in L. sulcata. Williamson’s figure represents a young speci- 
(1.) A very ingenious dredge has been constructed by Mr. David Robertson, F.G.S., of 
Glasgow. It dips deep into the bottom and fills quickly. It has an advantage over the ordi- 
nary dredges in this respect, as each haul brings up a very uniform quantity of the sea bottom. 
See notes on the recent Foraminifera and Ostracoda of the Firth of Clyde, by David Robert- 
son, F.G.S. — Trans. Geol. Soc. of Glasgow, Vol. V., Part I., p. 112. 
