ON THE GENUS POLYMORPHINA. . 237 
on our own coast. Prof. Williamson gives Brixham as the locality whence his specimens 
were obtained. | 
POLYMORPHINA RUGOSA, D'Orbigny. (Plate XL. figs. 23, a-d.) 
? Polymorphina rugosa, D'Orbigny, 1840, Foram. Cuba, p. 132, pl. 2. figs. 14, 15. 
Globulina rugosa, id. ibid. 1846, For. Foss. Vien. p. 229, pl. 13. figs. 23, 24. 
P. leprosa, Reuss, 1867, Sitzunsgsb. Akad. Wissensch. vol. lv. p. 73, pl. 4. fig. 3. 
P. foveolata, id. ibid. p. 74, pl. 4. fig. 2. 
P. leprosa, Karrer, 1868, ibid. vol. lviii. p. 173. 
P. foveolata, id. ibid. p. 173, 
Globulina asperula, Gümbel, 1868, Abhandl. d. ii. Cl. k. Akad. Wissensch. vol. x. p. 646, pl. 2. fig. 81, a, b. 
Characters.—Shell subglobular, oval, or oblong. Chambers few, variously combined. 
Surface rough, either from minute granular outgrowths, or slight elongate pitted depres- 
sions, or both. Length 3; inch. 
As has been stated in the Introduction, almost every variety of ‘ surface” within cer- 
tain limits may be found amongst the Polymorphine. When fully developed exostoses 
(like spines, bristles, or tubercles) occur, they are easily understood, and it only remains to 
the observer to determine the amount of importance to be assigned to them ; but when 
the altered condition of the shell amounts to little more than mere rugosity of the ex- 
terior, the questions arising from it are more difficult to answer. 
D'Orbigny's Globulina rugosa owes its roughness chiefly to minute "TH pitted de- 
pressions, whilst his Polymorphina rugosa has in addition granular outgrowths of shell- 
substance. P. foveolata, Reuss, appears to resemble the former, and P. leprosa, Reuss, 
follows the latter variety in these particulars. Such modifications of the typically smooth 
shell commence in Globulina punctata, D'Orb., which shows a somewhat irregular surface 
from abnormally developed foramina. In P. rugosa specimens are to be found porous 
or pitted or granular, sometimes both pitted and granular; and it is scarcely needful to 
attempt to separate into two or three subspecies so interwoven a series. 
The figure given in the “ Vienna Basin,” copied in Plate XL. fig. 23, a, 5, is excel- 
lently supplemented by those of Prof. Reuss above referred to. D’Orbigny’s Cuban spe- 
cimen (Plate XL. fig. 23, c, d) represents an altogether anomalous shell, with an irrregular, 
embracing, terminal chamber, monstrously developed, which almost obscures its Poly- 
morphine characters. He admits that such specimens are very rare; and much impor- 
tance can hardly be assigned to an exceptional example of this sort. 
Distribution.—Fossil in various Tertiary deposits. Recent in littoral sand from Cuba 
and Martinique. 
POLYMORPHINA VARIATA, Jones, Parker, and Brady. (Plate XL. fig. 24.) 
Polpsorihina variata, Jones, Parker, and Brady, Monogr. Crag Foram., App. I. & 11. (foot-notes), pl. 1. 
figs. 67, 68. 
Characters. — Shell oblong, compressed, unsymmetrical, few-chambered. Margin 
rounded, somewhat constricted over the septal lines. Chambers slightly inflated. Sur- 
face uneven, studded with irregular angular depressions imparting a mottled appearance 
to the whole exterior. Orifice variable, simple or labyrinthic. Length j; > 
I 
