OSCULIPOKA. 
65 
Affinities. 
The attachment by a sole-Hke disc on the obverse face of the 
zoarium and the strong midrib are the most striking features of 
this species. The nearest ally of the typical form is Osculipora 
pinnata\ for the regular form, with its thin, plate-like, peristomal 
ridges, is unlike the massive bundles of 0, repens. Both 0. repens 
and O.filix are very irregular, and it is impossible to draw any 
absolute line of division between these irregular forms. 
Yig. 'l\.— Omd\pora x 10. Y\g. 'lo.— Osculipora filxx\ x 10. 
D. 3374. D. 3374. 
LIST OF SPECIMENS. 
D. 3374. Two branches of zoaria, Avith immersed gonoocia (on slide). Maas- 
trichter Kalk. Maastricht. Van Breda Coll. Figs. 24 and 25 . 
60,153. Four regular zoaria (on slide). Maastrichter Kalk. Maastricht. 
Yan Breda Coll. 
D. 3369. Three irregular zoaria (on slide). Maastrichter Kalk. Maastricht. 
Yan Breda Coll. 
D. 3370. A thick zoarium (on slide). Maastrichter Kalk. Maastricht. A"an 
Breda Coll. 
D. 3372. The irregular base of a zoarium (on slide). Maastrichter Kalk. 
Maastricht. Yan Breda Coll. 
D. 3375. Tavo zoaria, AA'ith regular but short peristomal ridges (on slide). 
Maastrichter Kalk. Maastricht. Yan Breda Coll. 
D. 3381. Thirty-four zoaria. Maastrichter Kalk. Maastricht. Yan Breda Coll. 
D. 3382. Three typical zoaria, with broad elliptical areas of attachment (on 
slide). Maastrichter Kalk. Maastricht. Yan Breda Coll. 
D. 3383. Tavo regular zoaria (on slide). Maastrichter Kalk. Maastricht. 
Yan Breda Coll. 
D. 3384. Two zoaria, AAuth regular, pinnate, peristomal processes (on slide). 
Maastrichter Kalk. Maastricht. Yan Breda Coll. 
D. 3385. One regular zoarium (on slide). Maastrichter Kalk. Maastricht. 
Yan Breda Coll. 
F 
