118 
FORAMINIFERA OF OBAN. 
May, 1889. 
This textularian form has four rows of longitudinal 
markings on the test, involved or plaited, the 
angle of one side in the curve of the other. 
Very common. 
29. Bolivina difformis. Williamson, 1858. 
Williamson (R. F.), 1858, p. 77, pi. v., figs. 166-7. 
Brady, H. B., 1884. Challenger report, p. 421, 
pi. liii., figs. 5-6. 
Balkwill and Wright (I. FA, 1885, p. 835. 
As Messrs. Balkwill and Wright observe : “A true 
Bolivina , having the longitudinal, notch-like 
aperture, common to all the Bolivina. ” H. B. 
Brady remarks: “If so, the Bolivina pygmcea, 
Challenger Report, may be merged into the same 
species.” Rare. 
30. Bolivina dilatata. Reuss, 1849. 
Williamson (R. F.), 1858, p. 76, pi. vi., figs. 164-5. 
Robertson, D., Portree Bay, 1880. 
A much broader form than the former ones, with a 
very acute edge. Frequent. 
31. Cassididina Icevigata. D’Orbigny, 1826. 
Williamson (R. F.), 1858, p. 68, pi. vi., figs. 141-2. 
Outline very circular, form lenticular or biconvex. 
Rare. 
32. Lagena globosa. Montagu, 1803. 
Williamson (R. F.), 1858, p. 8, pi. i., figs. 15-6. 
Balkwill and Wright (I. F.), 1885, p. 336. 
Robertson, D. (W. S.), 1874, frequent. 
Mr. J. Wright draws attention to the globular Lagenas, 
“the apertures of which are respectively stellate 
and fissurine,” and restricts the stellate aperture 
to L. globosa , the fissurine aperture to a round 
form of L. Icevigata, Reuss. Frequent. 
33. Lagena Icevis var. clavata. D’Orbigny, 1846. 
Williamson (R. F.), 1858, p. 5, pi. i., fig. 6. 
Balkwill and Millett (Gr.), 1884, p. 10. 
Fusiform in shape, with long neck, and, as J. Wright 
points out, a milled rim at the aperture. 
Frequent. 
34. Lagenci gracillima. Seguenza, 1862. 
Robertson, D. (W. S.), 1874, common. 
A more lanceolate form than the last, both ends 
acuminate. Frequent. 
35. Lagena sulcata. Walker and Jacob, 1798. 
Williamson (R. F.), 1885, p. 5, pi. i., fig. 8; p. 6, 
pi. i., fig. 10; p. 7. pi. i., fig. 11. 
