116 DIA.STOPORA. 



as a synonym of B. microstoma (Mich.), as e.g. by Haime and 

 Sauvage. This course is not followed here, as the ornamentation 

 is different ; the zooacia, moreover, are shorter and thicker, and the 

 apertures are irregularly arranged. 



In later times the species which seems most nearly allied to 

 this is B. corrugata, Reuss, pars. 1 But the Russian species has 

 longer zooecia, and these are more clearly marked off from one 

 another, instead of being submerged in the general surface of 

 the zoarium. The latter character is often produced by the 

 weathering of a zoarium ; but that this does not explain it in 

 the present case, is shown by the preservation of the ornamentation. 



LIST OF SPECIMENS. 



35250. Bradford Clay. Bradford, Wilts. J. Wood Coll. Figd. PI. VI. 



Fig. 3. 



D.2126. Bradford Clay. 



35249. On root of Apiocrinus. Bradford, Wilts. J. Wood Coll. 

 B. 4850. Lower Oolite. Figd. PL VI. Fig. 2. 

 D. 1911. Great Oolite. Richmond boring, 1205ft. Presented by Prof. J. W. 



Judd, C.B., F.R.S. The type of Diastopora microstoma var. 



connectens, Vine. 



D. 2088. On annelid tube. Bathonian. Eanville. 

 60346. Bathonian Calcaire a polypiers. Tesson Coll. 



DIASTOPORA, Lamouroux, 1821, emended. 



SYNONYMY : 

 Diastopora, pars, Lamouroux, 1821. 



,, Milne Edwards, 1838, et auct. 



Mesenteripora, Blainville. 

 Bidiastopora, D'Orbigny, 1849. 

 Elea, D'Orbigny, 1852. 

 Multelea, D'Orbigny, 1852. 

 Cisternifera, pars, Walford, 1894. 



Diagnosis. TubuliporidaB in which the zoarium is erect and 

 foliaceous. (These may be simple fronds ; or may be split up 

 into multifid segments ; or may grow into hemispherical masses 



1 A. E. Reuss. Tert. Bryoz. Kisch. Bessarabien: Sitz. k. Akad. Wiss. 

 Wim. Bd. Ix. 1869, p. 510, pi. i. figs. 6, 7, non pi. ii. figs. 1-5. 



