BEEENICEA. 99 



Bajocian Calcaire ferrugineuse : Moselle (fide Terquem). 



Zone of Cosmoceras subfurcatum : Longwy, near Metz. 



Zone of Sonninia sowerbyi : Flace, near Ma9on (fide Ferry aud 

 Waagen). 



Zone of Perisphinetes quercinus: Thumereville (fide Terquem). 



Calcaire a T. phillipsi : Tramayes, near Ma9on (fide Ferry) . 

 Lias : Banz, Bavaria. 



Affinities. This species is characterized by the development of 

 the ooscia, which are large and pyriform. Its zocecia resemble 

 those of both B. dilumana and B. loloniensis. It is therefore 

 necessary to consider whether this species is a form of either of 

 these, in which the gonocysts are strongly developed. The species, 

 however, differs from B. diluviana by having a discoid zoarium, 

 and the orifices are more crowded. The gonocysts of the latter 

 species are also much smaller and narrower. The first of these three 

 characters also helps to separate this species from B. loloniemis ; 

 from this it also differs owing to the peristomes being irregularly 

 arranged, and the zocecia being longer. B. scobinula (Mich.) is 

 another Jurassic species with which this must be compared, for 

 they agree in several respects. B. scobinula, however, has the 

 zooecia regularly arranged, and the zooecia are visible only at the 

 ends, whereas in B. archiaci the central ones are visible throughout 

 their length. 



In the Cretaceous, this type is represented by B. disciformis 

 (Hag.) and B. confluens (Horn.), but neither of them are very 

 closely allied to this. In B. disciformis (Hag.) * the gonocysts are 

 not known, but it differs by having lower peristomes, and less 

 crowded peristomes than B. archiaci. B. confluens (Rom.) 2 has 

 a thicker and more crowded zoarium, as the zocecia are shorter. 

 B. hagenowi (Reuss) 3 is another ally ; this differs by the absence 

 of the large ocecia, while the zocecia are less crowded. 



A Cainozoic representative of this group is B. rotula (Reuss) ; 

 but the gonocysts of this species are not known, both the zocecia 



1 F. v. Hagenow. Bryoz. Maastr. Kreideb. 1851, p. 16, pi. x. fig. 7. 



2 Bomer. Verst. norddeut. Kreidegeb. 1840, p. 19. Better known by 

 description of Novak, Beitr. Bryoz. bohm. Kreidef. : Denk. k. Akad. Wiss. 

 Wien. Bd. xxxvii. p. 98, pi. iv. figs. 19-22. 



3 A. E. Reuss. Beitr. Char. Kreid. Ostalpen : Denk. k. Akad. Wiss. Wien. 

 Bd. vii. 1854, p. 136, pi. xxviii. fig. 6. 



