266 VINE : POLYZOA OF THE LOWER AND UPPER GREENSAND 
Upper Chalk, is present in the Cambridge material on a fragment of 
Inoceramus, but evidently derived from Lower Chalk Beds above. 
Habitat : On Inoceramus, and on an Echinoderm. 
Horizon : Lower Chalk ? Cambridge : Upper Chalk, Sussex. 
16. Diastopora Hagenowi, Reuss, pi. xii., figs. 9-9b. 
1872. Bryoz. des unteren "Planers," p. 109, pi. 26, f. 12. 
1885. D. cretacea, var. lineata, Vine. Camb. G. Pap., Op. Cit,, p. 9. 
On the same fragment of Inoceramus is a smaller and more disk- 
like species than D. cretacea, which closely resembles in all its 
characters D. Hagenowi, Reuss. Tliere are also two examples of 
this species on a large specimen of Radiolites Mm^toni, but these are 
irregular in their habit and not disk-like, but the cell arrangement 
are similar to the " derived" form. I do not think it wise to 
separate them. 
Habitat : On Inoceramus, and Radiolites Mortoni. 
Horizon : Lower Chalk ? Cambridge, and Cambridge Greensand. 
17. Diastopora fecunda. Vine, Camb Gr. Paper (Op. cit.), p. 9. 
In the above paper I described this species at greater length 
than the others, but because there are certain forms of Diastopora 
somewhat similar to. the above, both in the works of D'Orbigny 
and Reuss,* I have re-studied the examples again, with the following 
results. In his 1846 paper (Boheme Kreide, pi. 15, fig. 42), Reuss 
illustrated a peculiar Diastopora, which he named D. congesta, and 
another in the same work (pi. 15, fig. 41), D. confluens. This last 
species or variety is the Rosacilla confluens, Rcemer (1841). D'Orbigny 
adopted the name D. congesta (Voyez, 1847), which followed after- 
w^ards as Beptomidtisparsa congesta (Terr. Cret., vol. v., p. 878, 
pl.640, figs. 1-6). Reuss in 1872 (Die Bryoz., &c., " Planers," p. 110), 
united the whole of these forms, together with Reptomidtisparsa 
glomerata, D'Orb., under one name, Berenicea confiuens, Roemer's sp. 
The chief characteristic feature of all these varieties is, they are 
either proliferous, with cells rather distinct in the Zoarium, or blended 
together, or contiguous, which can be better seen in sections. Novak 
(Bryoz. der Bohem. Kreide., p. 97, pi. iv., figs. 1-10) describes and 
illustrates a new species, which in many senses is most peculiar, both 
in gi'owth and cell arrangement as Berenicea pilosa, and in his text 
