414 
CLAUSA. 
40,363. 
D. 4564. 
D. 433. 
D. 2840. 
D. 2720. 
D. 437. 
D. 4567. 
D. 4568. 
D. 990. 
D. 991. 
D. 992. 
D. 993. 
D. 3130. 
D. 4345. 
D. 494. 
D. 482. 
D. 2841. 
D. 352. 
D. 690. 
D. 691. 
D. 2760. 
D. 692. 
LIST OF SPECIMEXS. 
A branch 7 nim. lon£^ with the zooBcia in an open spiral. Upper 
Chalk. Kent. Simmons Coll. Fif^d. PI. XIII. Fif'. 8. 
A fusiform zoarium with a short bare end and apertures in a regular 
spiral. Upper Chalk. S.E. England. Toulmin Smith Coll. 
Figd. PL XIII. Fig. 9. 
Three fragments of zoarium with spindle-shaped branches. Middle 
Chalk. Chatham. Gamble Coll. Figd. PI. XIII. Fig. 10. 
Two specimens (on slide). Upper Chalk. Bromley. J. Simmons 
Coll. Figd. PI. XIII. Fig. 11. 
A branch with an unusually long barren end, which is 3-0 mm. in 
length (on slide). Middle Chalk. Chatham. Vine Coll. Figd. 
PI. XIII. Fig. 12. 
Three branches (on slide), with long barren base and terminal 
gonocyst. Middle Chalk. Chatham. Gamble Coll. Figd. 
PI. XIII. Fig. 13. 
The transverse section across a branch (on slide). ^Middle Chalk. 
Chatham. Figd. Xo. 5G, p. 413. 
A thin longitudinal section across part of the same specimen as the 
last (on slide). Middle Chalk. Chatham. Figd. Xo. .57, p. 413. 
Five small rvorn fragments (on slide). Upper Chalk. Gravesend. 
Collected by Professor T. R. Jones. Vine Coll. 
A small worn fragment (on slide). Upper Chalk. Gravesend. 
Vine Coll. 
Three fragments, one with well -developed distal end (on slide). 
Upper Chalk. Gravesend. Vine Coll. 
Seven fragments (on slide) . Upper Chalk. Gravesend. Vine Coll. 
A branch with distant apertures (on slide). Upper Chalk. Kent. 
J. Simmons Coll. 
A branched zoarium shoAnng a sudden change from regular spiral 
with twelve apertures in each whorl to a loose open spiral with 
seven apertures in the whorl. In the latter part of the zoarium 
the radial ribbing is well developed. Middle. Chalk., Chatham. 
Gamble Coll. 
A branched fragment on flint. Middle Chalk. Chatham. Gamble Coll. 
Three well - developed specimens with spiral apertures. Middle 
Chalk. Chatham. Gamble Coll. 
Five specimens (on slide). Upper Chalk. Bromley. J. Simmons Coll. 
Four specimens (on slide). Middle Chalk. Chatham. Gamble Coll. 
Three specimens of the regularly spiral form, one ^^dth long barren 
end (on slide). Middle ChalL Chatham. Vine Coll., Xo. 60. 
Recorded by Vine as Seteropom franeqana. 
Three specimens of the same form (on slide). Middle Chalk. 
Chatham. Vine Coll. 
A small fragment (on slide). Middle Chalk. Chatham. Vine Coll. 
Two fragments (on slide). Middle Chalk. Chatham. Vine Coll., 
Xo. 61. Recorded by Vine as Heteropora franeqana. 
