144 KEror/r — 1884. 



71. Diastopora obelia, Johnst. (Hincks, p. 462), Post-Piiocene of 

 Canada (Dawson). . 



72 Diastopora suboubiculakis, Hincks (Hincks, p. 404) = D. simplex, 

 Bask, ' Cra2 Poly.' 113, pi. xx. fig. 10, not Diseosparsa simplex 

 ofD'Orb (Hincks) = ? D.flahellum, Reuss (Hincks). 



The following are the identifications and descriptions of the different 



authors. . . . 



73. Diastopora lineata, Gabb and Horn (Cretaceous), -Approaches 



D. regularis, D'Orb.' (G. & H. op. n't.). 



74. Diastopora discifobmis, Hagenow (Cretaceous), op. cit. pi. i. 



fig. 7. 

 74* Diastopora disciforms, Goldf , Up. Oligocene, Roemer, ' Polyp. 



Nord. d. Tert. Geb.' 

 75 Diastopora minima, Reuss, 'Marine Limestone, Nussdorf.' ' Foss. 



Pol. d. W. Tert.' 

 70 Diastopora rottla, Reuss, 'Marine Limestone, Eisenstadt, loss. 



Pol. d. W. Tert.' 



77 Diastopora sparsa, Reuss, 'Marine Limestone, Eisenstadt, 'loss. 



Pol. d. W. Tert.' , 



78 Diastopora flabelllm, Reuss, ' Marine Limestone, Eisenstadt, 



' Foss. Pol. d. W. Tert.' 

 Two other species are given by Reuss— D. plumula, Rss., and D. 

 echinata, (ioldf. These have already been referred to Tuhulipora. _ 



79. Diastopora patina, Lamk. ; Pliocene, Castrocaro, Manzoni, ' Bn. 



di Castrocaro,' p. 44. 



80. Diastopora striata, J. Haime ; Pliocene, Castrocaro, Manzoni, 



' Bri. di Castrocaro,' p. 44. 



81. Diastopora expansa, Manzoni; Pliocene, Castrocaro, Manzoni, 



' Bri. di Castrocaro,' p. 45. 

 8° Diastopora meanduina, S. Wood, ' Crag;' Busk, ' Crag Pol. p. 10U 

 = Mesenteripora ibid., Bask, pi. xvii. fig. 2; pi. xviii. fig. 4; 

 pi. xx. fig. 2 = D. Eudesiana, M.-Edw. (?) = Vitaxm^ eompressa, 

 (?) Goldf., Hagenow = Mesenteripora neocomiensis, D'Orb. ' Ter. 



The following synonyms of this species are given by Smitt, ' Scan- 

 dinavian Bryozoa' : — . 



(Jeriopora eompressa, Goldf.; Polyfrema, D Orb. ; Ditaxia, Hag.; 

 Mesenteripora, D'Orb.; Bidiastopora MicJielina, D'Orb. ; Mesenteripora, 

 ibid., D'Orb. ; Bidastopora and Mesenteripora Eudesiana, D Orb. 



Family III. Hornerids, Smitt. 

 ' Zuurla opening on one side only of a ramose zoarium, never adnate 



and repent.' . 



The family Hoknemdje, as defined by the Rev. T. Hincks, is capable 

 of very wide extension, and can be made to include the Polypondoe 

 (' Brit Assoc. Rep. Foss. Poly.' 1883), in which I have placed the Poly- 

 para and Phyllopora of the Palaeozoic Rocks. It may seem, however, a 

 very questionable proceeding to include so many apparently diversified 

 forms in one family group, especially as we have no gradational links by 

 which we can unite the Polypora of the Palaeozoic with the well-denned 

 Hornera of the Tertiary Rocks. But, irrespective of the peculiarity, 

 I see no sufficient reason for keeping the group separate if we are to 

 accept Mr Hincks's c 3 '^gliosis. The same remarks may apply to the 



