206 MESSES. E. HEKON-ALLEN AND A. EAELAND ON THE 



15 Stations. 



Fairly generally distributed ; common at some Stns., the best at Stns. 2, 14, 18, and 

 19. Specimens with the tail-plate as figured by us (H.-A. & E. 1913, CI. pi. i. fig. 6) 

 occur at several Stns. 



6. Biloculina inflata, Wright. 



Biloculina ringens, Lamarck, var. nov., Balkwill & Wright, 1885, DIS. p. 322, pi. xii. figs. 6, 7. 

 inflata, Wright, 1902, GPL. p. 183, pi. xiii. figs. 1-4. 



2 Stations. 



A few specimens at Stn. 19 and many at Stn. 18. Tbe specimens at Stn. 18, which 

 are the best, are rather more compressed than is indicated in Wright's figure — nearer, in 

 fact, to the specimens figured by Millett as biloculine forms of Miliolina valvularis 

 (Reuss) (M. 1898, etc., FM. 1898, p. 501, pi. xi. fig. 6). Wright, in first publishing this 

 little form, placed it with £. ringens, but it appears to us to be more closely related to 

 B. irregularis, the aperture in the young forms of that species being similar but much 

 smaller. 



7. Biloculina irregularis, d'Orbigny. 



Biloculina irregularis, d'Orbigny, 1839, FAM. p. 67, pi. viii. figs. 20, 21. 

 Brady, 1884, FC. p. 140, pi. i. figs. 17, 18. 



11 Stations. 



Generally distributed, common at several Stns. The specimens are subject to great 

 variation. D'Orbigny's original figure represents a shell laterally compressed (as con- 

 trasted with facial compression such as reaches its limit in B. depressa) ; Brady's 

 examples show this compression in a less marked degree. The ' Buna ' specimens are 

 perhaps even more globular than Brady's figures, although at many Stus. specimens 

 occur of a compressed habit ; some of these show distinct traces of a third chamber 

 indicated externally, thus constituting a passage-form into Miliolina. The young 

 specimens have, as a rule, characteristically small apertures with a slightly projecting 

 lip. 



8. Biloculina spliasra, d'Orbigny. 



Biloculina sphara, d'Orbigny, 1839, FAM. p. 66, pi. viii. figs. 13-16. 

 „ „ Brady, 1884, FC. p. 141 (fig.), pi. ii. fig. 4 a, b. 



3 Stations. 



Occurs at only three Stns., but is abundant at Stns. 2 and 20, where the specimens are 

 fully developed, and extremely typical and of all sizes. 



The species was transferred by Schlumberger (S. 1891, BGF. p. 190, figs. 45, 46) to 

 the genus Blanispirina on the ground of its internal structure, but in the present state 

 of our knowledge of the Miliolidse the transference does not appear to us to be desirable. 



