60 PEOBOSCINA. 



Diagnosis. Tubuliporidse in which the zooecia form flat, adnate, 

 multiserial zoaria. The zoaria are mainly in linear bands, which 

 may or may not branch. The zocecia are tubular. The peristome 

 is either flush with the surface of the zoarium or somewhat raised. 



Type species. P. loryi, Audouin. 



Affinities. The retention of this genus is somewhat reactionary, 

 for most authors now place it as a synonym of Stomatopora, 

 Berenicea, Diastopora, or even Entalophora. It is certainly nearest 

 to Stomatopora and Berenicea, between which it is intermediate. 

 Pergens has described a specimen which begins as a Diastopora, 

 then gives rise to branches of Proloscina, and these end as Stoma- 

 topora ; and upon the evidence of this specimen he merges the two 

 latter. This specimen, however, proves either too much or too 

 little. If its evidence is to be accepted, then the three genera 

 ought to be united. But Pergens retains Stomatopora as distinct 

 from Diastopora in spite of it. To do otherwise would be prac- 

 tically to abandon the use of genera in the Cyclostomata. I 

 frankly admit that there are specimens intermediate between 

 Proloscina and Diastopora on the one hand, and between the 

 former and Stomatopora on the other. Nevertheless, there is a large 

 group of species which exhibit the characters of the above 

 diagnosis, and the genus is therefore a convenient one ; and to 

 expect genera of Cyclostomata to be more than convenient groups 

 of species, seems hopeless at present. Proloscina is therefore 

 accepted as a genus which differs from Stomatopora by having a 

 multiserial zoarium, and from Berenicea by having its zocecia 

 arranged in bands instead of in broad sheets. 



1. Proboscina eudesi, Haime, 1854. 



SYNONYMY : 

 Proloscina eudesi, J. Haime, 1854, Bry. jurass. : Mem. Soc. geol. France, 



ser. 2, t. v. p. 167, pi. vi. figs. 9a-b. 



Pictet, 1857, Traite Pal. ed. 2, t. iv. p. 144. 



,, Vine, 1883, 3rd Rep. Foss. Polyz. : Rep. Brit. Assoc. 1882, 



p. 264. 

 ,, ,, Schlippe, 1888, Bath, oberrhein. Tiefland. : Abh. geol. 



Specialk. Elsass-Loth. Bd. iv. livr. 4, p. 97. 

 ,, ,, Friren, 1893, Bry. ool. inf. Metz : Butt. Soc. Hist. nat. 



Metz, ser. 2, t. vi. p. 45. 

 ,, ,, Gregory, 1895, Eev. pt. ii. : Ann. Mag. Nat. Hist. ser. 6, 



vol. xvi. p. 447. 



