CRISIJTA. 
185 
LIST OF SPECIMEjS'S. 
D. 3752. Four fragments (on slide). One specimen shows a large gonocyst. 
Maastrichter Kreide. Maastricht. Van Breda Coll. Figd. No. 14. 
D. 3355. Three fragments (on shde). Maastrichter Kreide. Maastricht. 
Tan Breda Coll. 
D. 3541. Thirty fragments. Maastrichter Kreide. Maastricht. Van 
Breda Coll. 
D 3352. A dozen fragments and broken zoaria. Maastrichter Kreide. 
Maastricht. Van Breda Coll. 
D. 3358. A branched fragment (on slide). Maastrichter Kreide. Maastricht. 
Van Breda Coll. 
D. 1374. A fragment of a young zoarium in the stage of I. maculata, Hag. 
(Hagenow, Bry. Maastr. Kr. pi. ii. figs. 3(?-^), on slide. 
Maastrichter Kreide. Maastricht. Vine Coll. 
D. 6433. A fragment (on slide). Maastrichter Kreide. Maastricht. Busk 
CoU. 
D. 7061. Several fragments (on shde). Senonian — Maastrichtian : La Mare, 
Chapet, Seine-et-Oise. Presented by Professor T. E,. Jones. 
4. Crisina (Reticrisina) ligeriensis (d’Orbigny ), 1850. 
SYNONTilT. 
Eeticulipora ligeriensis, d’Orhigny, 1850. Prod. Pal. vol. ii. p. 264. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 609, figs. 1-5 (6?). 
,, ,, d’Orbigny, 1854. Ibid. p. 905. 
,, ,, Pergeus, 1890. Eevision, p. 355. 
,, ,, Pergens, 1893. Bry. St. Pat. : Bull. Soc. beige Geol. 
vol. vi. p. 205. 
,, girondina, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 265. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 609, figs. 7-12. 
,, ,, d’Orbigny, 1854. Ibid. p. 906. 
,, ,, Pergens, 1890. Eevision, p. 355. 
Hiag^tosis. 
Zoarium broad, frondose, undulating. iVetwork fairly regular, 
and no sharp separation into primary and secondary branches. 
The interspaces are fairly uniform in size ; they mainly appear 
hexagonal or rhomboidal on the posterior surface, and square, 
rhomboidal, or irregular on the anterior. 
Zooecia from five to seven or eight, in a vertical series. 
(According to Pergens, “la caracteristique de cette espece est la 
production de petites surfaces rhomboidales a la terminaison 
des zoecies.”) 
