ZONATULA. 
217 
DlilENsrONS. mm. 
Zoarium : length 7 
Zoarium : diameter ... ... ... ... 3-4 
Zooecia : diameter ... ... ... ... -2 
Distribution. 
Eed Chalk: Hunstanton.^ 
Figures. 
PI. IV. Fig. 9. Zoarium from the side; X 6 dia. Eed Chalk: 
Hunstanton. lesson Coll. D. 2057. 
Affinities. 
The specimen, D. 2057, taken to represent this species is the best 
preserved of a series of fragments from the Eed Chalk, which have 
been described by Vine and referred to several species. It appears 
to be clearly a Zonatula, but the others are probably members of 
the same species, though their generic characters are not shown ; 
and they possibly include representatives of more than one species. 
The species is in all probability the Reptomulticava favus of 
Seeley, although Vine retained that as a Reptomulticava (Proc. 
Yorks. Geol. Soc. 1891, vol. xi. p. 383). Professor Seeley’s 
original description is brief. According to it the species is related 
to R. collis and R. mamilla, but is twice their size ; it is irregular 
in growth, and twice as high as wide; the zooecia are denser than 
in R. collis ; the walls are very thin ; the lower apertures are 
hexagonal, but at the upper part of the zoarium they are distant, 
round, and protuberant. 
This description accords well with the chief characters recog- 
nizable in the following series of specimens. 
LIST OF SPECIMENS. 
D. 2057 . A characteristic zoarium. Figured by Vine as Zonopora irregularis, 
d’Orb. Red Chalk. Hunstanton. Jesson CoU., Vo. 45. Figd. 
PI. IV. Fig. 9. 
D. 2045 . A small zoarium, 9 mm. high and 4 mm. Aside, embedded in Red Chalk. 
Red Chalk — Middle Bed. Hunstanton. Labelled by Vine 
micropora (?), Goldf., No. 34. The surface is not AS'ell preserved, 
and it is possibly heteroporous. Piuchased T. Jesson, 1891. 
D. 2046 . Two stems of small zoaria, 4 mm. in diameter and 4 mm. high. Red 
Chalk— Middle Bed. Hunstanton. Labelled by Vine Ceriopora 
micropora, Goldf., yar., No. 35. Purchased T. Jesson, 1891. 
^ If Wiltshire’s C. spongites is based on this species, the locality' of Speeton 
must he added. 
