RECENT FORAMINIFERA OF THE RIVER HUMBER. 149 
Discorbina globularis, d’Orb. Will., Rec. Foram. Gt. Brit., 
p- 53, pl. iv., f. 104, 105. Carp. P. & J., Introd. Foram., 
p- 204, pl. 1ii., f. 1. Brady, Rep. Chall., p. 643, pl. Ixxxvi., 
f. 8, 13. 
Discoidal, thick, the superior surfaces quite convex, the 
inferior slightly so; segments somewhat inflated, finely per- 
forated, hyaline, all visible superiorly, only the last convolution 
inferiorly ; sutures somewhat depressed; aperture large and 
irregular. Common. Plate 11, fig. 34. 
Discorbina rosacea, d’Orb. Will., Rec. Foram. Gt. Brit., 
p. 54, pl. iv., f. r0og-111. J. P.& B., Crag Foram., pl. iv., f. 17. 
Goés, Relic. Rhizopoda Caribbean Sea, p. 105, pl. viii., f. 251- 
257. Brady, Rep. Chall., p. 644, pl. Ixxxvil., f. 1,4. Sherb. 
and Chap., J.R.M.S., 1886, p. 756, pl. xvi., f. 11 a, 6. 
Contour lenticular, plano-convex, peripheral margin 
rounded. Frequent. Plate 11, fig. 35. 
Discorbina rugosa, d’Orb. Brady, Rep. Chall., p. 652, pl. 
Ixxxii., f. 3 a, 6, c (pl. xci., f. 4 4, b, ¢). Sherb. and Chap., 
J.R.M.S., 1889, p. 487, pl. xi., f. 33. Chap., J.R.M.S., 1896, 
p- 582, pl. xiil.. f. 10 a-c. 
Test compressed, nearly symmetrical, the peripheral edge 
is round and lobated. The umbilical cavity of the inferior 
side is partially covered in by the valvular flaps protecting the 
successive apertures. Rare. Plate 11, fig. 36. 
Planorbulina mediterranensis, @’Orb. J. P. & B., Crag 
Foram., pl. ii, f. 3. Brady, Rep. Chall., p. 656, pl. xcil., f. 
1-3. B.P.& J., Trans. Zool. Soc., XII. (1888), p. 227; pl. 
xlv., f. 18. 
A thin, flat, nearly circular shell, composed of numerous 
segments arranged in a single layer, more or less distinctly 
spiral, the first whorl being nautilated and of a darker 
colour than the younger ones. Inferior surface flat, superior 
surface lobated; periphery irregular; segments inflated, 
slightly embracing, conspicuous and_ profusely perforated ; 
sutures depressed; apertures at the extremity of each seg- 
ment, simple with raised lip. The living animal is often 
attached to foreign bodies. Extremely well grown specimens 
frequent. Plate 11, fig. 37. 
Truncatulina lobatula, Walker and Jacob. Will., Rec. 
Foram. Gt. Brit., p. 59, pl. v., f. 121, 123. Carp. P. & ‘J., 
