190 
EETECAVA. 
D. 3520. Thicker basal fragments (in tube). Maastrichter Kreide. Maastricht. 
Van Breda Coll. 
D. 3521. Base of a zoarium (on slide). Maastrichter Kreide. Maastricht. 
Van Breda Coll. 
D. 3597. Part of a worn zoarium (on slide), showing prominent zoarial lamina. 
Maastrichter Kreide. Maastricht. Van Breda Coll. 
D. 3222. Two fragments showing obverse face (on slide). Maastrichter 
Kreide. Maastricht. Van Breda Coll. 
D. 1371. Two worn fragments showing obverse face (on slide), ^laastrichter 
Kreide. Maastricht. Vine Coll. 
D. 1372. One worn fragment showing obverse face (on slide). Maastrichter 
Kreide. Maastricht. Vine Coll. 
D. 3224. A series of zoaria and fragments. Maastrichter Kreide. Maa.stricht. 
Van Breda Coll. 
D. 3755. Fragment of zoariTim showing reverse face (on slide). Maastrichter 
Kreide. Maastricht. Gamble Coll. 
? D. 3293. A weathered zoarium, possibly a specimen of the verriculata form. 
M aastrichtian : Craie ii baculites. Orglandes, Manche. 
D. 6434, D. 6435, D. 6436. Eight specimens (on three slides). Maastrichter 
Kreide. St. Pierre. Busk Coll. 
D. 6685, D. 6686. Six specimens (on two slides). Maastrichter Kreide. 
Fauquemont. Busk Coll. 
2 . Retecava cretacea (M. Edwards), 1838. 
Synonymy. 
Idmonea crttacea, M. Edwards, 1838. Mem. Cris. : Ann. Sci. nat. Zool. ser. 2, 
vol. ix. p. 237, pi. xii. tig. 5. 
,, ,, Lonsdale, 1850. In Dixon, Geol. Suss. p. 275, pi. xviii. 
figs. 5, oa-h. 
,, ,, Morgan, 1882. Terr. cret. Scand. : Mem. Soc. geol. Fr. 
ser, 3, vol. ii. p. 15. 
,, ,, Vine, 1884. Fourth Eeport : Eep. Brit. Assoc. 1883, 
p. 164. 
,, dixoftiana, Mantell, 1844. Med. Great, vol. i. p. 287; p. 284, 
figs. 6, 12. 
,, commtmis, d’Orbigny, 1853. Bry. Cret. p. 745, pi. 750, figs. 6-10. 
,, ,, Pergens, 1890. Eevision, p. 349. 
,, ,, Pergens, 1895. Bry. Arche de Leves : Bull. Soc. beige Geol. 
vol. viii. p. 134. 
,, ,, Pergens, 1895. Bry. Cachemh. : Bull. Soc. beige Geol. 
vol. viii. p. 182. 
,, unipora {non d’Orhigny), Beissel, 1865. Bry. Aach, Kr. : Kat. Verb. 
Holl. Maatsch. Wet. ser, 2, vol. xxii. p. 74, pi. viii. 
figs. 97-101. 
Crisidmonea macropora, Marsson, 1887. Bry. Eiig. : Pal. Abb. vol. iv. p. 30, 
pi. ii. fig. 13. 
