VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 383 
37. Reptomulticava mamilla, Rss. (Wiltshire). 
1869. Quart. Jour. Geol. Soc, vol. xxxv., p. 187. 
Horizon : Middle and Lowest layers. Red Chalk, Hunstanton. 
(Common, Wiltshire). 
38. Reptomulticava favus, Seeley. 
1866. Ann. Mag. Nat. Hist., Ser. iii., vol. xvii., p. 181. 
A form, says Prof. Seeley, nearly related to R. collis and R. 
mamilla, but irregular in growth, more resembling d'Orb's Ceriopora 
digitata. It is a common fossil and may be marked R. fctcm. 
Although I only admitted two species of Reptomulticava (Nos. 
35 and 36) in my paper, the other two may be advantageously 
adopted. I have retained Prof Seeley's name, however, as most 
appropriate for one of the undescribed examples in my cabinet. 
Habitat : On Fragments of Water- worn Red Chalk. 
Horizon : Top layer (xl.) Hunstanton. 
Genus ZoNOPORA. 
D'Orbigny in his oth Family Caveidae (Terr. Cret. v., p. 922) 
has brought together no fewer than twenty-seven genera, all of which 
are peculiar, or characteristic. The author includes in this family, 
Zonopora, Ditaxia, Lichenopora, Domopora and Radiopora. In his 
" Revision des Bryozoaires du Cretace figures par d'Orbigny," Dr. 
Pergens,* these genera are separated, and Zonopora and Multicrescis 
are designated Heteropora. For the convenience of reference, and to 
prevent any misinterpretation in the present paper of the Monograph 
of Red Chalk Polyzoa (Q. J. G. Soc, vol. xlvi), I quote the names 
given in the latter paper, with the additional references furnished by 
Dr. Pergens in his Revision. 
39. Zonopora irregularis, d'Orb. 
1840. Zonopora irregularis, d'Orb., Prodr. ii., p. 87. 
1852. „ „ d'Orb., Terr. Cret. v., p. 390, pi. 771, 
figs. 4, 6. 
1890. Heteropora arborea Koch, et Dunker. (Pergens.) Revis. des 
Bryoz., p. 373. 
* Bulletin de la Soc. Beige de Geol. de Palaeontologie, 1889, Tome iii.. 
pp. 305, 400. 
