410 
MR. W. K. PARKER AND PROFESSOR T. R. JONES ON SOME 
Miliola ( Triloculina ) cryptella , D’Orbigny. Plate XV. fig. 39 (Arctic). 
This is an extremely inflated and short Triloculine Miliola , its chambers overlapping 
so much more than in the symmetrical trigonal forms, that in some instances the ante- 
penultimate chamber is but little exposed. It is not common. 
Triloculina cryptella, D’Orb., For. Amer. Mer. p. 70, pi. 9. figs. 4, 5, approaches 
closely, in appearance, to Biloculina sphcera, D’Orb., op. cit. p. 66, pi. 8. figs. 13-16, with 
which it was found at the Falkland Islands. B. sphcera has its chambers so much over- 
lapping that it scarcely shows the penultimate chamber (as characteristic of Biloculina ), 
Tr. cryptella having so much overlap in its chambers that it scarcely shows the ante- 
penultimate (as characteristic in Triloculina'). 
Tr. cryptella is a curious isomorph of Sphceroidina (p. 369), and might easily be mis- 
taken for it, for both are white in colour ; the texture, however, is hyaline in Sphceroidina 
(related to Globigerina ), and opake in Triloculina , as in all Miliolce. 
We have Triloculina cryptella from Baffin’s Bay, 75° 25' lat., 60° long., where it is 
rather common and middle-sized at 314 fathoms. 
Miliola ( Quinqueloculina ) Seminulum , Linne, sp. Plate XV. figs. 35 a, 35 b (Arctic) ; 
Plate XVII. fig. 87 (North Atlantic). 
Figs. 35 a, b represent a neat form of the typical and widely distributed Miliola (M. 
Seminulum , Linn., sp.), such as is common in deepish water, and well figured by D’Orbigny 
as Quinqueloculina triangularis (For. Foss. Vienn. p. 258, pi. 18. figs. 7-9). It is from 
Norway. 
Fig. 87, from the North Atlantic, is a sandy specimen, but is not so coarsely built up 
as the variety known as Q. agglutinans , D’Orb. (Plate XV. fig. 37). 
Q. Seminulum is common and large on the Norway coast; common and rather small 
at the Hunde Islands ; rare and small at 220 fathoms in Baffin’s Bay. 
In the North Atlantic soundings it is small; common at 43 and 78 fathoms, and rare 
at 90 fathoms on the Irish plateau ; rare at 2035, 2050, and 2350 fathoms in mid-ocean ; 
and rare and of middle size at 954 fathoms north of the Bank. 
In his ‘North- Atlantic Sea-bed’ Dr. Wallich figures Q.Seminulum, pi. 5. figs. 9, 10, 15 ; 
and Q. secans , fig. 7. 
Q. triangularis takes the place of the typical Q. Seminulum in many parts of the Medi- 
terranean and Red Seas, and of the Indian, South Atlantic, and Pacific Oceans. 
Miliola ( Quinqueloculina ) agglutinans , D’Orbigny. Plate XV. figs. 37 a, 37 b (Arctic). 
Quinqueloculina agglutinans, D'Orb. (For. Cuba, p. 195, pi. 12. figs. 11-13), is a well- 
developed, often rusty-red, arenaceous Miliola Seminulum , of wide distribution, and 
varying much with the character of the sea-bed. The shell-substance cementing the 
grains of sand may be reddish in Quinqueloculina, though on white sand in Australia its 
shell becomes white, and on black sand at Orotava, Canaries, it is black. 
We have Q. agglutinans, of middle size, from the Hunde Islands (Dr. Sutherland), 
