228 
EXTALOPHOEA. 
LIST OF SPECBIEXS. 
D. 4072. Middle Chalk. Chatham (on slide). Gamble Coll. Figd. PI. X. 
Fig. 5. 
D. 948. A long angular specimen (on slide). Middle Chalk. Chatham. 
Vine Coll. Eecordedas probosciden, forma fUformis, 
Ahne : Eep. Brit. Assoc. 1893, p. 309. PI. X. Fig. 6. 
3). 418. A small branch with a gonoecium, x 6 dia. Middle Chalk. Chatham. 
Gamble Coll. Figd. PI. X. Fig. 7. 
B. 2854. A specimen (on slide) with E. virgula (Hag.). Chalk Detritus. 
Charing, Kent. T. E. Jones Coll. 
B. 2833. A specimen (on slide) with E. virgula (Hag.). Upper Chalk. 
Bromley, Kent. Simmons Coll. 
3. Entalophora geminata (von Hagenow), 1851. 
Synony^iy. 
Eustulipora geminata , von Hagenow, 1851. Brv. Maastr. Kr. p. 20, pi. i. 
fig. 11. 
Entalophora ,, d’Orbigny, 1853. Bry. Cret. p. 780. 
,, ,, Hamm, 1881. Bry. mastr. Ob. -Sen. p. 29. 
,, ,, Marsson, 1887. Bry. Eiig. : Pal. AbL vol. iv. p. 21. 
,, „ A'ine, 1893. Compl. Eep. : Eep. Brit. Assoc. 1892, 
pp. 309, 330. 
? ,, carantina, d’Orbigiiy, 1853. Bry. Cret. p. 784, pi. 753, figs. 16-18. 
Diagnosis. 
Zoarium of long, thin, dichotomous branches. The aspect is 
angular, as the waHs of the zooecia are flattened, and the 
zooecia marked ofl by longitudinal ridges. The walls are 
punctidate. 
Zooecia long, with the apertures in paii’s at some distance apart. 
The paired arrangement is, however, occasionally suppressed. 
In other cases a suhverticiUate arrangement results from the 
occurrence of two pairs of apertures at about the same level. . 
Peristome well raised. 
Dl^klENSIONS. 
Diameter of a branch 
•5 
mm. 
Diameter of zooecia 
•2 
>> 
Diameter of aperture 
•1 
»» 
Distance between pairs of apertures 
.. 1-5 
Disteibution. 
British : 
Upper Chalk : Magee Island, North Ireland. 
Middle Chalk : Chatham. 
