BEEEXICEA. 
87 
D. 2986. 
D. 3889. 
D. 4156. 
D. 4166. 
D. 4340. 
D. 4267. 
50,472. 
D. 2985. 
D. 2984. 
D. 2983. 
D. 5156. 
D. 3915. 
D. 3908. 
D. 3914. 
D. 3910. 
D. 3883. 
D. 8913. 
D. 3898. 
D. 3916. 
D. 3900. 
A large regular zoarium, encrusting a fragment of Echinocorys. 
Middle Chalk. Chatham. Presented by Wm. Gamble, Esq., 1889. 
Zoaria of different ages, encrusting a broken Echinocorys. Middle 
Chalk. Chatham. Gamble Coll. 
Five young zoaria, encrusting Echinocorys scutatiis. Middle Chalk. 
Chatham. Gamble Coll. 
A large irregular zoarium covering 20 mm. of a stem of Eesmeopora 
semicylindrica (Eom.). Middle Chalk. Chatham. Gamble Coll. 
A zoarium of var. echinata. Middle Chalk. Chatham. Gamble 
CoU. 
A large irregular zoarium and a medium-sized regular specimen on 
echinid fragments ; Nos. 1 and 2 on a slide with Berentcea gracilis 
(Edw.), var. (Ess.). Middle Chalk. Chatham. Gamble Coll. 
Two young zoaria on echinid fragments (on slide). Chalk. England. 
Morris Coll. 
Two zoaria on a bone of ‘ Ichthyosaurus campylodon.'' Lower 
Chalk. Folkestone. Capron Coll. The larger zoarium appears 
linearly grooved, probably owing to shrinkage or flattening of the 
bone. 
A well-preserved zoarium of var. oceanica (Orb.), encrusting an 
Echinocorys fragment (on slide). Middle Chalk. Chatham. 
Vine Coll. 
A large zoarium, without gonocysts, encrusting an Echinocorys 
fragment (on slide). Middle Chalk. Chatham. Vine Coll. 
A young zoarium on an Inoceramus fragment, with a young zoarium 
of Berenicea gracilis (Edw.), var. tenuis (Ess.), (on slide). Middle 
Chalk. Chatham. Gamble Coll. 
A zoarium 15 mm. in diameter, encrusting an echinid fragment (on 
slide). Middle Chalk. Chatham. Gamble Coll. 
A regular zoarium, with imperfectly developed gonocysts, encrusting 
an Echinocorys fragment (on slide). Middle Chalk. Chatham. 
Gamble Coll. 
A medium-sized zoarium, with one gonocyst and a young zoarium, 
encrusting an Echinocorys fragment (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
An elliptical zoarium, encrusting an Echinocorys fragment (on slide). 
Middle Chalk. Chatham. Gamble Coll. 
A zoarium, with an irregular but complete gonocystal band, 
encrusting an echinid fragment (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
Two zoaria, without gonocysts, encrusting a fragment of Micraster, 
sp. (on slide). Middle Chalk. Chatham. Gamble Coll. 
A large circular zoarium, with an irregular series of gonocysts, 
encrusting a fragment of Echinocorys (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
A medium-sized, thick zoarium, encrusting an Echinocorys fragment 
(on slide). Middle Chalk. Chatham. Gamble Coll. 
A broken zoarium, with gonocysts, encrusting an Echinocorys frag- 
ment (on slide). Middle Chalk. Chatham. Gamble Coll. 
