CRISIJTA . 
171 
D. 448. 
D. 2645. 
D. 529. 
D. 447. 
D. 2621. 
D. 967. 
D. 4496. 
D. 974. 
D. 2837. 
D 1000. 
D. 4499. 
D. 4498. 
D. 7060. 
Four zoaria (on slide) . Typical variety. Middle Chalk. Chatham. 
Gamble Coll, 
A zoarium (on slide). Typical variety with short peristomes. 
Middle Chalk. Chatham. Vine Coll. 
A zoarinm with very long peristomes. Middle Chalk. Chatham. 
Gamble Coll. 
Three branched zoaria. Middle Chalk. Chatham. Gamble Coll, 
A zoarinm with short peristomes. Middle Chalk. Chatham. Vine 
Coll., Xo. 36. 
Three branched zoaria. Middle Chalk, Chatham. Vine Coll., 
Xo. 20. 
A small fragment. Upper Chalk. Gravesend. (T. E. Jones Coll.) 
Vine Coll. The specimen is hardly long enongh for the 
determination to he free from donbt. 
Two fragments (on slide). Middle Chalk. Chatham. Vine Coll. 
Eecorded as Idmonea francorum by Vine : Eep. Brit. Assoc. 
1892, p. 330. 
Two zoaria (on slide). Upper Chalk. Bromley. Simmons Coll. 
Yar. pulchella (Mars.). 
A small fragment (on slide) . Upper Chalk. Gravesend. Vine Coll. 
A longer fragment (on slide). Upper Chalk. Bromley. Simmons 
Coll. 
A fragment showing reverse side (on slide). Upper Chalk. Kent. 
Simmons Coll. 
Foreign. 
Two fragments (on slide). Senonian. La Mare, Chapet, Seine- 
et-Oise. Presented by Professor T. E. Jones. 
2. Crisina (Tervia) dorsata (von Hagenow), 1851. 
Synonymy. 
Idmonea dorsata, von Hagenow, 1851. Bry. Maastr. Kr. p. 31, pi. ii. fig. 10. 
,, ,, Kade, 1852. Los, Verst. Schanzenb. p. 31. 
,, ,, d’Orbigny, 1853. Bry. Cret. p. 739, pi. 748, figs. 16-19. 
,, ,, Hamm, 1881. Bry. mastr. Ob. -Sen. p. 31. 
non ,, ,, Vine, 1885. Xotes Camhr. Greensd. : Proc. Yorks. Geol. 
Polyt. Soc., new ser., vol. ix. p. 14. 
,, ,, var. faxeensis, Pergens & Mennier, 1887. Bry. gar. Faxe : 
Ann. Soc. Bry. malac. Belg. vol. xxi. p. 216, pi, xi, fig. 1. 
,, ,, pars, Marsson, 1887. Bry. Eiig. : Pal. Abb. vol. iv. p. 28. 
on ,, ,, Vine, 1889. Polyz. Greensd. : Proc. Yorks. Geol. Soc. vol. xi. 
p. 260. 
pars, Pergens, 1890. Eevision, p. 344, pi, xii. fig. 5. 
Pergens, 1893. Bry, St. Pat. : Bull. Soc. beige Geol. vol. vi. 
p. 204. 
