DEFKANCIOPOEA. 
155 
Dimensions. 
D. 1398. 
mm. 
Height of zoarium 
5-5 
Diameter of zoarium ... 
3-5 
Width of rim 
•7-'8 
Diameter of apertures 
•3-*4 
Distkibetion. • 
Senonian — Maastrichtian : Maastricht. 
Figeees. 
PI. YI. Pig. 6a. The type-specimen from the side ; X 6^ dia. 
Pig. 63, part of the rim of one segment ; X 30 dia. Maastrichter 
Kalk : Maastricht. Vine Coll. D. 1398. 
Affinities. 
Vine identified the type-specimen as Defrancia cochloidea. It 
appears, however, to differ sufficiently from that species to he 
worthy of specific separation. The differences are that the zoarium 
consists of sancer-shaped instead of solid snh-colonies, and the 
apertures are confined to the outer rim of the segments. 
D. 1398. Two specimens (on slide). Maastrichter Kalk. Maastricht. Identified 
as Defrancia cochloidea by Vine. G. R. Vine Coll. Figd. PI. VI. 
Fig. 6. 
3* ? Defranciopora sessilis (vou Hagenow), 1851. 
Syn. Ceriopora sessilis, von Hagenow, 1851. Bry. maastr. Kr. p. 53, pi. v. 
%. 7. 
,, ? ,, TJbaghs, 1890. Descr. Geol. Pal. Limb. p. 225. 
Defranciopora sessilis, Hamm, 1881. Bry. mastr. Oh. -Sen. i., Cycl.p. 39. 
? 3Iultelea sessilis, Beissel, 1865. Bry. Aach. Kr. : Hatuurk. Verb. Holl. 
Maatsch. Wet. vol. xxii. p. 11. 
,, ,, TJbaghs, 1890. Descr. Geol. Pal. Limb. p. 222. 
Chak. — Zoarium a small thick disc, with raimite apertures arranged in curved 
or straight intercrossing lines. 
Distrib. — Senonian — Maastrichtian : Maastricht. 
Aff. — T his species may he represented in the collection by D. 4268, a fossil 
labelled by M. Pergens Ceriopora sessilis. Hag. = Eeptomultieava cupula, 
d’Orh. ; hut he adds “not large enough to identify with certitude.” This 
specimen is not a Bryozoon, but, so far as can he judged from von Hagenow’s 
figures, neither is the type of C. sessilis. 
? 4268. A ring-shaped fossil which is not a Bryozoon, though identified as 
Ceriopora sessilis. Middle Chalk — zone of Micraster cortestu- 
dinarium. Chatham. Gamble Coll. 
