10 FORAMINIFERA OF THE CRAG. 
re-named so frequently as the little shell now under notice. We may look upon this as the 
true specific type to which the whole of the varieties of the Jfole belong, although 
for convenience we confine the use of the name to the particular form of shell indicated by 
the general characters above given. As might be supposed, its distribution 1s world-wide 
—-scarcely a sample of sca-sand, either dredged or littoral, from any quarter of the ¢lobe, 
can be examined without finding specimens of it. In the Crag deposits we have it, in Mr. 
Searles Wood’s collection, from Sutton, very large and common; from Gedgrave and 
Sudbourne ; and from the Red Crag of Essex. From the Bridlington Crag we have many 
specimens, for which we are indebted to Mr. H.C. Sorby. Qwinqueloculina seminulum 
is common in the Grignon Beds of the Paris Basin, and m many subsequent Tertiary 
strata. Varieties of Q. seminulum occur also in the Cretaceous deposits. 
2. QUINQUELOCULINA TRIANGULARIS, D’Orbigny. Plate IV, fig. 1. 
QUINQUELOCULINA TRIANGULARIS, D’Ordb., 1826. Ann. Se. Nat., vol. vii, p. 302, No. 34. 
— ee Id, 1846. For. Foss. Vien., p. 288, pl. 18, figs. 
#—9. 
MrioLta (QUINQUELOCULINA) SEMINULUM, Parker and Jones, 1865. Phil. Trans., vol. elv, 
p- 410, pl. 15, figs. 35a, 356. 
Characters.—Shell oval, convex ; end-view more or less triangular. Colour, white to 
yellowish-brown. Length, ;5th inch. 
A few large angular Quinqueloculine Afi/iole occurring in the Lower Crag of Sutton, 
together with some smaller specimens from the ‘“ Crag with Polyzoa,” and others from 
the Bridlington Crag, seem to claim separation from the typical form, and may be taken 
together conveniently, with D’Orbigny’s name ¢riangularis, as a sub-varietal designation. 
They present the nearest approach we have in the Quingueloculine series to 
the angular condition represented by Biloculina depressa and Triloculina tricarinata, in 
their respective subgenera, although the margins of the chambers present somewhat 
softened angles, rather than any prolongation into carine. A/i/iole with these characters 
are to be found in the Mediterranean, the Red Sea, the South Atlantic, the Pacific, and 
the Indian Oceans, and, as fossils, in the Tertiary clays of the North of Italy, and the 
Vienna Basin. In some of these localities they appear to take the place of the typical 
Miliola (Quinqueloculina) seminulum. 
Quingueloculina semiplana, Reuss, ‘ Zeitsch. Deutsch. Geol. Ges.,’ vol, vil, p.275, pl. 10, 
fig. 1 (from the Chalk of Mecklenburg), cam scarcely be distinguished from @. ¢riangularis. 
The difficulty of drawing definite lines among the varicties and sub-varieties of iliole 
will be readily realised, if we endeavour to work out the synonymy of such Quingue- 
loculine as are typified by Q. triangularis ; D’Orbigny’s Q. Lamarckiana (‘ For. Cuba,’ 
pl. 11, figs. 14, 15); Q. Auberiana (Ibid., pl. 12, figs. 1—3) ; Q. Buchiana (‘ For. Fos. 
