Transactions of tlie Society. 



Biloculina buUoides d'Orbigny. 



Biloculina buUoides d'Orbigny, 1826, Ann; Sci. Nat., vol. vii, p. 297, No. 1, 



pi. xvi, figs. 1-4. 

 B. buUoides Brady, 1884, Chall. Kept., p. 142, pi. ii, figs. 5, 6. 



Two typical tests occur, thougli one of them has a rather long, 

 narrow flange projecting at its base. 



Biloculina ringens (Lamarck). 



Miliolitet ringens, Lamarck, 1804, Ann. du Museum, vol. v, p. 351, No. 1, 



vol. ix, pi. xvii, fig. 1. 

 Biloculina ringens Brsidy, 1884, Chall. Kept., p. 142, pi. ii, figs. 7, 8. 



The orifice varies in shape. One test has the mouth composed, 

 as it were, of two flanges, the opening being a narrow slit. Another 

 test has its width greater than its height, and others again tend 

 towards B. elongata d'Orb. 



Biloculina irregularis d'Orbigny. (PI. I, figs. 2, 3 (?).) 



Biloculina irregularis d'Orbigny, 1839, Foram. Amer. Merid., p. 67, pi. viii, 

 figs. 20, 21. 



Characteristic examples occur. There are also a number of 

 small, polished globular tests, which I do not think are immature 

 specimens of the above. They may be the B. glohclus of Eeuss, 

 An interesting set, from which I have chosen one specimen for 

 illustration. 



Biloculina sphtera d'Orbigny. 



Biloculina sphcera d'Orbigny, 1839, Foram. Amer. Merid., p. 66, pi. viii, 



figs. 13-16. 

 B. sphcera Brady, 1884, Chall. Eept., p. 141, pi. ii, fig. 4, a, b. 



A solitary example. Schlumberger treats this form as Plani- 

 spirina, but until the consensus of opinion is more definite upon the 

 subject, it is perhaps as well to keep it among the Biloculinse. 



Biloculina coniata Brady. 



Biloculina cotnata Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi, N.S., 



p. 45. 

 B. coniata Brady 1884, Chall. Rept., p. 144, pi. iii, fig. 9, a, b. 



The tests agree with the " Challenger " illustrations. 



Spiroloculina d'Orbigny. 

 Spiroloculina excavata d'Orbigny. 



Spiroloculina excavata d'Orbigny, 1846, For. Foss. Vienne, p. 271, pi. xvi, 



figs. 19-21. 

 S. excavata Brady, 1884, Chall. Kept., p. 151, pi. ix, figs. 5, 6. 



Four occur. They agree well with d'Orbigny's figures in the 

 above reference. 



