262 
EADIOPORIDJE. 
Stellocavea bipartita, ITbaghs, 1858. Neue Bry. Maestr. : Palapontogr. vol. t. 
p. 129, pL xxvi. fig. 1. 
,, ,, Ubaghs, 1879. Descr. Geol. Pal. Limb. p. 224. 
,, ,, Ubaghs, 1888. C.R. Excursion: Bull. Soc. beige GeoL 
vol. i. p. 221. 
,, trifoliiformis, Ubaghs, 1858. Neue Bry. Maestr. : Palaeontogr. 
vol. V. p. 129, pi. xxvi. fig. 2. 
,, ,, Ubaghs, 1879. Descr. Geol. Pal. Limb. p. 224. 
,, ,, Ubaghs, 1888. C.R. Excursion: Bull. Soc. beige GeoL 
vol. i. p. 221. 
Carinifer trenkneri, Hamm, 1881. Bry. mastr. Ob. -Sen. i., Cycl. p. 27. 
Diagnosis. 
Zoarium circular, with a flat base and about seven primary 
ridges, and about twenty shorter secondary ridges. 
Distribution. 
Senonian — Maastrichtian : Maastricht, Yalkenberg, Petit-Lanaye. 
Lower Maastrichtiau : Glavaut and Calcaire de Kunraed. 
Affinities. 
Hamm includes as synonyms the Stellocavea Mpartita, trifolii- 
formis, and coronata of Ubaghs. The Museum Collection includes 
two specimens which were acquired as S, hipartita, one of them 
having been identified as such by M. Pergens. . From inspection 
of those specimens I am prepared to follow Hamm’s example. 
Hamm’s own Carinifer trenhneri seems to me to be only 
a synonym of this species. He describes it as oval and having 
about twenty-four radial ridges, which is approximately the same 
number as in S. francqana ; the number is indefinite, as there is 
no distinct separation between the small teeth, whicK represent 
merely the beginnings of radial ridges and those which are large 
enough to be counted as ridges. 
LIST OF SPECIMENS. 
D. 3720. Half a zoarium of the typical form (on slide).' Maastrichter Kalk. 
Yalkenberg. Gamble Coll. Identified by M. Pergens. 
D. 1350. A zoarium 6x5 mm. diameter (on slide). Maastrichter Kalk. 
Maastricht. Identified by Yine as Stellocavea cultrata, d’Orb., 
but it has neither of the characters of that species figured by 
d’Orbigny. Yine Coll. 
D. 3767. A zoarium (on slide). Maastrichter Kalk. Yalkenberg. Identified 
by M. Pergens as Stellocavea bipartita, Ubaghs. Gamble Coll. 
B. 804. A zoarium of S. francqana, 6*5 ram. in diameter. Labelled Stello-^ 
cavea bipartita. Maastrichter Kalk. Maastricht. Presented by 
Mrs. Burnett, May, 1882. 
