160 VINE: FOSSIL POLYZOA : ADDITIONS TO THE CRETACEOUS LISTS. 
II. Stomatopora longiscata, d'Orb., pi. VI., fig. 1. 
S. longiscata, d'Orb., Terr. Cret, v., p. 839, pi. 629, figs. 9-11. 
For other references and remarks see Proc. Yorksh. Geol. Soc, 
vol. xi., p. 372, and Quart. Journ. Geol. Soc, vol. xlvi., p. 465. 
Excepting that the Zooecia in parts of the branch are very 
slightly curved, the Chalk Marl form is identical with those referred 
to in the above papers. 
Horizon : Chalk Marl ; my own Cabinet ; No. 2 from Chalk Marl 
above Red Chalk, Hunstanton. 
III. Diastopora regularis, d'Orb., pi. VI., fig. 6-7. 
1850. Diastopora regularis, d'Orb., Terr. Cret. pi. 636, figs. 9-10. 
densata, d'Orb., I.e., pi. 637, figs. 1-2. 
orbicula, d'Orb., I.e., pi. 637, figs. 3-4. 
1852. Berenicea regularis, d'Orb., Terr. Cret., p. 865. 
1890. Diastopora regularis, d'Orb. Revis. des Bryoz. Pergens, p. 334. 
1890. Vine. Quart. Journ. Geol. Soc, vol. 46, 
p. 476. 
1890. „ „ Vine. Proc. Yorksh. Geol. Soc, vol. xi., 
p. 380. 
In looking over the figures of d'Orbigny on plates 636 and 637, 
as given in the synonymy above, one would be inclined to keep all 
the forms distinct. Diastopora regularis, pi. 636, figs. 9-10, has a 
proboscina-like zoarium with distinctly separated cells, and with 
interspaces between ; whilst in D. densata, pi. 637, figs. 1-2, the 
originating cells are central, the intervening spaces less distinct, and 
the zoarium is really discoid. In 1852, however, d'Orbigny felt con- 
strained, after examining a large number of examples to place 
the three species under one name, taking the D. regularis, pi. 636, 
fig. 7, as the type of the whole. In my Red Chalk Paper (Quart. 
Journ. Geol. Soc, 1890, p. 476) I described a form, unique in that 
horizon. 
Zoarium fixed, discoid or slightly flabelliform, composed of dis- 
tinct cells, arranged in lines or alternately placed ; adherent by their 
whole length, separated by interspaces, which are either smooth or 
partially punctate (?) In fig. 6 the zoarium is discoid with central 
