4S2 MR. G. R. VINE ON THE POLYZOA OF 



in this family, among others, Zonojpora, Lltaxia, LlcJienopora, 

 JJoiuopora, and Radiopora, 



The Zonopora group may be regarded, judging from one of its 

 species {Z. variabilis, d'Orb.), as a Ueteropora, but not so with tlie 

 other forms. As I have met with two or three examples in the 

 lied Chalk that may be placed here, rather than elsewhere, I pro- 

 visionally refer them to this genus, hoping that other and better 

 examples may be brought to light. 



35. Zonopora irregularis (?), d'Orb. 



18-J9. ZoiiOj.)oya irregularis, d'Orb. Prod. ii. p. 87. 



1852. Zonopora irrtyularis, d'Orb. Terr. Ciet. v. p. 390. ])1. 771. 

 figs. 4-6. 



Two small fragments of a species either allied to, or identical 

 with, the above have been found in the top beds of the Hed Chalk 

 of Hunstanton. D'Orbigny shows in his fig. <> two sorts of orifices : 

 1st, in raised cells, with thick peristomes, distributed in zones, but 

 irregular; 2iid, very fine intermediary openings, similar to those 

 found in HcUropora. Small sections, worked up to view as semi- 

 transparent, show Beteropora-like intermediary " cells ' in the 

 centre, while the produced thick orifices of the larger ceils, or true 

 zooecia, of the species appear like those found in sections of Hetero- 

 pora also. My material is far too limited to warrant further re- 

 search at present. 



Habitat. This is possibly a derived Polyzoon embedded in Red 

 Chalk. Fossil No. 45. 



Horizon. Top beds of the lied Chalk, Hunstanton. D'Orbigny's 

 species was found in the Keocomian, 17th stage. 



36. Zonopora ? variabilis, d'Orb. 



1852. Zonopora variabilis, d'Orb. Terr. Cre't. v. p. 931, pi. 771. 

 figs. 9-13. 



There are only minute fragments, w^hich I place here doubtfully. 



Fossil No. 46. 



Horizon. Top Beds, Eed Chalk, Hunstanton. D'Orbigny's species 

 was found in Senonian strata, 22nd stage. 



Genus MuLTiCREScis, d'Orb. 



37. MuLTicREscis VARIABILIS (?), d'Orb. 



1852. Multicrcscis variabilis, d'Orb. Terr. Crdt. v. p. 1077, pi. 800, 

 figs. 3-7. 



In some respects the zoarium of the present species is similar to 

 the example that I have placed under the Ceriopora micropora (?), 

 Goldfuss ; but careful examination of the orifices of the two foj-ms 

 shows that the two are specifically distinct. 



Fossil 'No. 47. 



Horizon. Top Eeds, Red Chalk, Hunstanton. D'Orbigny's species 

 is found in the 20th Cenomanian stage at Le Mans. 



In Mr. Etheridge's list of Cretaceous Polyzoa (Bibliograph. 36, 



