EEPTOilTJLTISPlESA. 
119 
Foreign : 
Cenomanian : Schillinge, near Bilin, Bohemia, in Lower Planer. 
FiGrEES. 
PI. TI. Fig. 5. A young zoarium, the type of Vine’s B.fecimda ; 
X 7 dia. Upper Greensand : Cambridge. Vine Coll. B. 4452. 
PI. VI. Fig. 6. A young zoarium, X 10 dia. Chalk Detritus: 
Charing. T. R. Jones Coll. D. 2861. 
PI. VII. Fig. 3. A nodular zoarium. Fig. 3fl?, upper suilace 
of the zoarium, natui’al size ; Fig. 33, part of the same fi’om the 
side, X 7 dia. Upper Chalk : Guildford. Capron Coll. D. 3030. 
Affinities. 
This zoarium begins as a Berenicoid disc, and by the rapid 
superposition of the successively developed zooecial groups it 
becomes massive. 
The main characters of the species are its long, thin zooecia, 
and its regular zooecial groups. Its Jurassic representative is 
R. microstoyna (^ich.),^ in which, however, the apertui’es occur in 
more regular, cuiwed series. The nearest Cainozoic ally of this 
species is the ^ Liastopora corrugata' Bss.,’^ fi'om South-Western 
Russia. 
LIST OF SPECIMENS. 
B. 4452. A young zoarium of three confluent discs (on slide). Upper Green- 
sand. Cambridge. A'ine Coll. The type of Biastopora fecunda, 
Vine. Proc. Yorks. Geol. Soc. vol. ix. p. 18. Figd. PL VI. 
Fig. 5. 
D. 1866. Two small zoaria (on slide). Upper Greensand. Cambridge. 
lesson Coll. Recorded by Vine as B. congesta^ d’Orb., non Reuss. 
? D. 2962. A young, discoid zoarium, on Pharetrospongia strahani. Upper 
Greensand. Cambridge. Jesson CoU. Identified by Vine as 
Biastopora fecunda, Vine. 
D. 3160. A worn zoarium and a thin vertical section of the same (on slide). 
Upper Greensand. Cambridge. Old Coll. 
D. 2861. A voung zoarium. Chalk Detritus. Charing. T. R. Jones Coll. 
Figd. PI. VI. Fig. 6. 
D. 2864. A young zoarium, 3 mm. in dia. (on shde). Chalk Detritus. 
Charing. T. R. Jones Coll. 
^ Michelin : Icon. Zooph. p. 243, pL Irii. fig. 1 ; Cat. Jur. Bry. p. 114. 
2 A. E. von Reuss. Tert. Bry. Kischenew in Bessarabien: Sitz. Akad. 
Viss. Vien. vol. lx. pt. 1 (1870), p. 510, pL i. figs. 6, 7 ; pL ii. figs. 1-5. 
