PEOBOSCIKA. 
53 
L. 4269. With Memhranipora and Cribrilina on Echinocorys scutatus. Middle 
Chalk Chatham. Gamble Coll. 
D. 3801. Encrusting fragment of Micraster, sp. (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
D. 8852. Encrusting echinid fragment (on slide). Middle Chalk. Chatham. 
Gamble Coll. 
D. 3853. Encrusting echinid fragment (on slide). Middle Chalk. Chatham. 
Gamble Coll. 
D. 3851. Encrusting a fragment of Echinocorys (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
10. Proboscina bohemica, J^ovak, 1877. 
Synonymy. 
Proboscina bohemica^ Novak, 1877. Bry. bbhm. Kr. : Denk. Akad. Wiss. Wien. 
vol. xxxvii. pt. 2, p. 101, pi. v. figs. 24, 25. 
>> n Eric, 1883. Isersch. : Arch. Naturw. Landesf. Bohm. 
vol. V. No. 2, p. 124, fig. 105. 
,, ,, Vine, 1890. Bry. Bed Chalk: Quart. Journ. Geol. Soc. 
vol. xlvi. p. 472. 
,, Vine, 1891. Bolyz. Bed Chalk: Proc. Yorks. Geol. Soc. 
vol. xi. p. 377. 
Piastopora ,, Hamm, 1881. Bry. mastr. Oher-Sen. pt. i. p. 25. 
Proboscina diffluens, Novak, 1877. Op. cit. p. 102, pi. v. figs. 10-13. 
Piastopora ,, Pocta, 1892. Mech. Koryc. Hory; Ceska Akad. Fr. 
Jos. Praze, sect. ii. p. 16, pi. ii. figs. 12, 13. 
Proboscina claviformis, Vine, 1890. Bry. Bed Chalk: Quart. Journ. Geol. Soc. 
vol. xlvi. p. 470. 
,, subelegans [non Orb.), Vine, 1890. Ibid. p. 470. 
,, ,, {non Orb.), Vine, 1891. Pol. Bed Chalk : Proc. Yorks. 
Geol. Soc. vol. xi. p. 376. 
,, ,, {non Orb.), Vine, 1893. Compl. Bep. : Bep. Brit. Assoc. 
1892, p. 328. 
Piastopora bacca^ Pocta, 1892. Mech. Koryc. Hory : Ceska Akad. Fr. Jos. 
Praze, sect. ii. p. 15, pi. i. figs. 17, 18. 
? Proboscina cornucopicc {non Oih.), pars, Vine, 1893. Compl. Bep. : Bep. Brit. 
Assoc. 1892, p. 307. 
Diagnosis. 
Zoarium irregular, in broad, lobed branches, with or without 
a narrow marginal selvage. 
Zooecia large and not very clearly marked off from one another. 
The apertures in the younger parts of the branches are 
arranged in lines, running obliquely across the zoarium. 
hlear the ends of the branches the zooecia are crowded. 
The peristomes are slightly raised. The surface is plain or 
corrugated. 
