ZOXATULA. 
215 
D. 3469. A branch of var. irregularis, 20 mm. long x 5 mm. wide, and 
section from the same. The smaller pores occur in irregular 
bands and patches. Maastrichter Kalk. Maastricht. Van Breda 
Coll. The vertical section is figured as Fig. 56, p. 213. 
D. 3415. Five stems with irregular laminae. Maastrichter Kalk. Maastricht. 
Van Breda Coll. 
D. 3356. A stem 9 mm. in diameter at the hollow base, and tapering regularly 
upward to 5 mm. diameter at the end. Maastrichter Kalk. 
^laastricht. Van Breda Coll. 
D. 3404. An irregular stem, 4 mm. in diameter and 19 mm. long ; it is hollow 
above. It is bent, and at the outer angles are groups of apertures, 
presenting an approach to the condition of F. verrucosa. Maas- 
trichter Kalk. Maastricht. Van Breda Coll. 
D. Miscellaneous. 
D. 3358. A zoarium with anastomosing branches, 33 mm. high x 21mm. across; 
the branches are compressed, being 6 mm. wide x 3-5 mm. thick. 
Maastrichter Kalk. Maastricht. Van Breda Coll. 
D. 3365. Two stem-’. IMaastrichter Kalk. Maastricht. Van Breda Coll. 
2. Zonatula brydonei, Gregory, 1909. 
Synonymy. 
Zonatula brgdonei, Gregory, 1909. Xew Cret. Bry. : Geol. Mag. dec. v. vol. vi. 
p. 64. 
Diagnosis. 
Zoarium club-shaped, with a short narrow stem and an egg- 
shaped head. The apertures of the zooecia are circular or 
subcircular. They are divided into groups by alternate 
horizontal larainm, which extend half-way across the zoarium 
and divide the apertures into alternate groups. 
Dimensions. 
Height of zoarium 24 
Length of head ... ... ... ... ... 20 
Diameter of head H 
Diameter of stalk ... ... ... ... 7 
Length of stalk ... 4 
Zooccia : diameter of apertures ... ... '1-T5 
Distance of zooecial centres ... ... ... •2--3 
Distribution. 
Lower Greensand (Aptian) : Farringdon, Berkshire. 
Figures. 
PI. IV. Fig. \0a. The zoarium from the side; nat. size. 
Fig. lOJ, part of the head; X 10 dia. Mantell Coll. 10,297. 
