REPTOMULTICAVA. 
149 
8. licheniformis (Michelin), 1846. 
Syx. Ceriopora licheniformis, Michelin, 1846. Icon. Zooph. p. 205, pi. Hi. 
fig. 5 ; non p. 323, pi. Ixxvii. fig. 11 (which 
was renamed, in 1848, in the errata, p. 348, 
C. lichenula). 
? ,, ,, Thomas k Peron, 1893. Descr. invert, foss. 
terr. cret. sud. Tunisie, pp. 344-6. 
non Radiopora ,, d’Orbigny, 1854. Bry. Cret. p. 993. 
Semimulticava ,, d’Orbigny, 1854. Ibid. p. 1031. 
Char. — Zoarium a large, broad, fiat, massive incrustation, with irregularly 
pitted upper surface and concentrically wrinkled under surface. (Tj^ie- 
specimen 48 x 30mm. diameter; Tunis specimens reach 110mm. across.) 
The zooecia are crowded, uniform in size, and quite irregular in arrangement ; 
minute {Jide Michelin, who describes the aperture as minutissimus). 
Distrib. — Cenomanian : Le Mans ; ? El Aieieha, Tunis. 
Aff. — D’Orbigny describes the zoarium as composed of many layers. The species 
resembles Michelin’s own figure of C. mamillosa, Rom. (Mich. pi. Hi. fig. 12), 
in which the zoarium is raised into humps instead of being flat, and the 
surface is marked by blunt, broad tubercles instead of shallow pits. Thomas & 
Peron remark its very close affinity to R. Jlabellum, which they keep distinct 
only on the ground of its Turonian age. M^hether the Tunisian specimens are 
correctly identified with this species appears a little doubtful, for the authors 
of that identification remark that the fossils present great analogies with 
‘ Ceriopora ’ letourneuxi, which appears to be a sponge. 
9. mamillata (d’Orbigny), 1850. 
Syn. Polytrema mamillata, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 209. 
Reptomulticav a mamillata, d’Orbigny, 1854. Bry. Cret. p. 1040, pi. 794, 
fig. 1. 
,, ,, Toucas, 1873. Terr. cret. Beausset: Mem. Soc. 
geol. France, ser. 2, vol. ix. pp. 42, 44. 
,, ,, Pergens, 1890. Rev. p. 387. 
non ,, ,, Vine, 1893. Rep. Cret. Polyz. : Rep. Brit. 
Assoc. 1892, p. 333. 
,, ,, ,, Gamble, 1896. Cat. Bry. Chatham, p. 4. 
Char. — A large irregularly mammillated zoarium, -svith very smaU apertures, 
Distrib. — Turonian : Le Beausset, Yar. 
Aff. — This species is separated from R. Jlabellum by its mammiUated zoarium. 
It is possibly a Ceriopora, though a lamellar structure is clearly suggested by 
d’Orbigny ’s figiure ; and in that case its nearest aUy would be C. irregularis , 
from which it would differ by its much smaUer apertures. 
There are two slides (D. 704-5) in the Vine Collection upon which this species 
has been recorded from the Chalk of Chatham and Gravesend. These specimens, 
however, are not Bryozoa. 
