PLATE XL 
Fig. 1. Entalophora echinata (Rom,). Middle Chalk ; Chatham. 
Base of a zoariiim, x 7 dia. Gamble Coll. [D. 4209,] 
Fig. 2. Entalophora virgula (Hag.), var. raripora. Middle Chalk : 
Chatham. A young zoarium with base, x 7 dia. Gamble 
Coll. [D. 4512.] 
Fig. 3. Entalophora^ sp. Middle Chalk : Chathanr. Base of 
a zoarium,. x 7 dia. Gamble Coll. [D. 4510.] 
Fig. 4. Entalophora gigantopora, Vine. Upper Greensand : Cam- 
bridge. Part of a branch, x 10 dia. Vine Coll. [B. 4450.] 
Fig. 5. Spiropora verticillata (Goldf.). Middle Chalk : Chatham. 
Part of a zoarium with verticillate and spiral rows of 
apertures, x 7 dia. Gamble Coll. [D. 420.] 
Fig. 6. Spiropora macropora {Ovh.). Upper Chalk : Salisbury. Two 
parts of the same zoarium, one spiral and one verticillate ; 
X 10 dia. Vine Coll. [D. 946.] 
Fig. 7. Spiropora macropora (Orb.), var. micropora. ]\Iiddle Chalk : 
Chatham. A zoarium partly verticillate and jiartly 
pinnate, x 7 dia. Middle Chalk : Chatliam. Vine Coll. 
[D. 662.] 
Fig. 8. Spiropora macropora (Orb.), var. semilaterotubigera. ^liddle 
Chalk : Chatliam. Fig. 8u, branch from the side, x 7 dia. ; 
Fig. 8b, end view of the same, x 7 dia. Gamble Coll. 
[D. 470.] 
Fig. 9. Spiropora r/iac?-opora (Orh.)^ var. jcssoni. Tapper Greensand : 
Cambridge. Part of Vine’s type of jessoni, x 10 dia. 
[B. 4449.] 
Fig. 10. Spiropora macropora (Ovh.), jessoni. Upper Greeirsand : 
Cambridge. Part of base of a stem, x 11 dia. Vine Coll. 
[D. 4447.] 
Fig. 11. Crisinct {Tervia) subgracilis, Orb. Middle Chalk : Chatham. 
Side view of part of a branch with gonoecium, x 10 dia. 
Gamble Coll. [D. 4068.] 
Fig. 12. Entalophora cretacea (Orb.). Middle Chalk : Chatham. 
Part of a zoarium with two gonoecia, x 10 dia. Gamble 
Coll. ^ [D. 416.] 
Fig. 13. Entalophora virg^ila var. inconstans. Middle Chalk ; 
Chatham. Part of a zoarium with gonoecium, x 10 dia. 
Gamble Coll. [D'. 4067.] 
Fig. 14. Meliceritites iChisma) furcillata (Lonsd.). Atherfield Clay ; 
east of Ladder, Shanklin. Part of a branch with the front 
wall partially preserved, x 15 dia. Caleb Evans Coll. 
[D. 2007.] 
Fig. 15. Meliceritites {Chisma) furcillata (Lonsd.). Atherfield Clay : 
Atherfield. Longitudinal section, the specimen figured 
by Lonsdale, Quart. Journ. Geol. Soc. vol. v. pi, v. 
fig. 26 ; X 7 dia. Morris Coll. [D. 4545.] 
Fig. 16. Entalophora virgula (Hag.). Upper Chalk : Gravesend. 
A worn fragment, x 10 dia. Vine Coll. [D. 1001'.] 
Fig. 17. Entalophora echinata (Rom.), Middle Chalk : Chatham. 
A zoarium partly striated, x 11 dia. Gamble Coll. 
[D. 4066.] 
Fig. 18. Entalophora virgula (Hag.). Upper Greensand ; Cambridge. 
Part of Vine’s tvpe of K. proboscidea, elegans, x 10 dia. 
Vine Coll. ^ [B. 4447.] 
