VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 385 
§ II. Sub-Order Cheilostomata, Busk. 
Species belonging to this sub-order are very rare in the Red 
Chalk The five well-marked species given below, are all that I have 
met with, and tliese are very fragmentary. Excepting the first, 
which is new, I have identified the other species to the best of my 
ability, but I think they ought to find a place here in the hope that 
better examples will be found in the future. 
44. Membranipora gaultina, Vine, Quart. Jour. Geol. Soc, v. xlvi., 
p. 484, pi. xix., figs. 13a-13b. 
Habitat : On Inoceramus, Terebratula biplicata, and T. capillata. 
Horizon : Gault, Cambridge ; Red Chalk, Hunstanton. 
45. Membranipora fragilis, d'Orb. 
1852. Flustrellaria fragilis, d'Orb., Terr. Cret. v., p. 545, pi. 723, 
figs. 5-9, 
1890. M. fragihs, Vine, Quar. Journ. Geol. Soc, p. 485. 
Habitat : On Terebratula biplicata, Red Chalk, Hunstanton. 
46. Membranipora ? obliqua, d'Orb. 
1852. Filiflustrellaria obliqua, d'Orb., Terr. Cret., v., p. 513, pi. 723, 
figs. 1-4. 
1890. M. obliqua? Vine, Q. J. Geol. Soc, vol. xlvi., p. 485. 
The fragment, adherent to Belemnites mmimus, is the only 
example of this species known to me from the Red Chalk of 
Hunstanton. 
47. Membranipora elliptica? Hagenow. 
Cellepora elKptica, Hag. Marginaria elliptica, Roem. 
Membranipora elliptica d'Orb. 
1877. M. elliptica, Xovak, Bryoz. bohm, Kreide, p. 89, pi. 2, fig. 16. 
Hesitating, as I do, to identify this species with von Hagenow's 
0. elliptica, I refer the student, with pleasure, to the long list of 
synonyms and references given by Novak, I have only one example, 
and as Novak's fig. 16, pi. ii., closely resembles its general features, 
his identification is adopted. 
Habitat : On Pentacrinus Fittoni, Red Chalk, Hunstanton. 
48. Hippothoa? simplex, d'Orb. 
1851. Hippothoa simplex, d'Orb. Terr. Cret., v., p. 385, pi. 711, 
figs. 5-8. 
