261 
Malcomson. — Recent Ostracodci of Belfast Lough. 
although they do not appear much worn ; but as several other species of 
Ostracoda, as well as Foraminifera, which usually inhabit deeper water, 
have been found in this locality, I think some such supposition is ren- 
dered likely. 
Cythere (?) acerosa, Brady. Although extremely rare, this species seems 
to be widely distributed in the deeper water outside Belfast Lough, hav- 
ing been found in no less than five gatherings. 
Cytheridea suMavescens, Brady. Five or six typical specimens of this 
extremely rare species have been found. 
Loj^oconcha cuneiformis, n. sp. Brady JUS. (Plate xxv., figs. 1-2.) Only 
one specimen, a male, of this species has been found. Carapace of male, as 
seen from the side, oblong, subrhomboidal, higher in front than behind, 
greatest height equal to half the length ; anterior extremity broad, 
marked with a few radiating hair-like lines, well rounded below, and 
sloping steeply backwards above, where it forms an obtuse angle with 
the dorsum ; posterior narrow, and obliquely rounded below ; superior 
margin straight, inferior slightly sinuated in front of the middle, and 
produced into a thin laminar process behind, which is continued round 
the posterior border. Outline, as seen from above, cuneate, greatest 
width in front of the middle, and scarcely equal to height ; acutely 
pointed in front, somewhat more obtusely behind. Shell pellucid, 
polished, thickly covered with very fine puncta, and a few distinct 
elevated papillae. 
Cytheropteron Montrosiense, B. C. and R. Only a single valve of this 
species has been found. 
Bythocythere pavo, n. sp. Brady MS. (Plate xxv., figs. 5-7.) Only six 
specimens of this species have been seen, all from the dredging off Black 
Head. It has been previously found by Dr. Brady and the Rev. A. M. 
Norman, but has not been described. Carapace of female, as seen from 
the side, oblong, subquadrilateral ; nearly equal in height through- 
out ; height equal to half the length, extremities rounded ; superior 
margin straight, inferior slightly sinuated in the middle. Seen from 
above ovate, greatest width behind the middle, and nearly equal to half 
the length ; anterior extremity muncronate, posterior evenly rounded. 
End view triangular, with rounded angles ; height slightly greater than 
width. Surface of shell thickly covered with fine punctures and large 
white papillae. Length, 1.100th inch. Dr. Brady informs me that 
most of his specimens have a slight lateral crest, which mine do nol 
show. 
Cytherideis foveolata, Brady. (Plate xxv., figs. 8-12.) This species, 
which has not been previously found in Britain, seems to be confined to 
