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CLIXOPORA. 
Entalophora Uncata, var. striatopora, Vine, 1892. Notes Up. Ch. Bn-. : Rep. 
Brit. Assoc. 1891, p. 6o8. 
„ Vine, 1893. Conipl. Rep. : Rep. Brit. 
Assoc. 1892, p. 331. 
Diagnosis. 
Zoarium of cylindrical branches with numerous irregularly 
arranged apertures. The peristomes arc very high and 
sharply reflexed ; they are, for this genus, not very distant. 
The lines on the surface anastomose occasionally. 
Dimensions. 
Diameter of branch 
Diameter of zooecia 
Diameter of aperture 
Distribution. 
Upper Greensand : Cambridge. 
Affinities. 
Worn fragments of this species appear similar to C. hneata^ 
but well-preserved specimens show the highly raised peristomes, 
the anastomosing lines, and the less distant apertures, which arc 
the characteristics of this species. 
LIST OF SPECIMENS. 
D. 1875. The hpe and three other specimens (on slide). Upper Greensand. 
Cambridge. Pig^* ^ iae, 1885. lesson Coll. 
B. 4447. Two worn fragments on slide with Entalophora virgula. Upper 
Greensand. Cambridge. ^ ine Coll. 
B.M., D. 1875. 
*7-1 mm. 
•35 „ 
•17 „ 
4. Clinopora spinigera, nov. 
\_Spinigei\ ‘ bearing thorns.’] 
Diagnosis. 
Zoarium] of stort, thick, erect branches, which appear thorny 
owing to the prominence of the highly raised peristomes, 
which project almost at right angles to the main axis. 
Surface of zoarium ornamented by strong longitudinal lines. 
Apertures distant, irregular, equally on all sides of the stem. 
