162 



BEroitT — 1884. 



13. Ceriopora spiralis, fig. 2, Maastricht, ' Petrefac.' Tab. XI. 



14. Ceriopora vaeiabilis, Miinst. ,, 



Tab. XXXVII. fig. 6, Maestriclit, Astrupp. 



15. Ceriopoka venosa, Goldfuss, „ 



Tab. XXXI. fig. 2, Maestricbt. 



— Ceriopoka venosa, Goldfuss, ,, Tab. X. 



fig. 7, Maestricht. 



16. CeRIOPORA POLTMORPHA, ., ,, 



Tab. XXX. fig. 11, Essen. 



17. Ceriopora spoxgites, „ „ Tab. X. 



fig. 14, Maestricbt, Essen. 



18. Ceriopora stellata, Goldfuss, „ 



Tab. XXXI. fig. 1, Essen. 



19. Ceriopora Diadema, Goldfuss, „ 



Tab. XXXIX. fig. 12, Essen. 



— Tab. XXXVII. fig. 3. „ 



20. Ceriopora mitra, Goldfuss, „ 



Tab. XXX. fig. 13. 



21. Ceriopora cribrosa. ., „ Tab. X. 



fig. 16. 



1. Eetepora clathrata, Goldf. (Idmonea) „ Tab. IX. 



fig. 12, Maestricht. 



2. Retepora lichenoides, „ ., ,, „ 



fig. 13, Maestricht. 



3. Eetepora truncata, „ „ „ „ 



fig. 14, Maestricht. 



4. Retepora disticha, ,, ; , „ „ 



fig. 15, Maestricht. 



5. Retepora cancellata, ,-, ,, ,, 



Tab. XXXVI. fig. 17, Maestricbt. 



' Maestricht Beds,' Hagcnow. 



The most systematic work that has yet been published on the Cre- 

 taceous Bryozoa (or Polyzoa) is that of Frederick V. Hagenow — ' Die 

 Bryozeen der Miistricbter Kreidebildnng,' 12 plates, 1851. In this mono- 

 graph the writer figures and describes about 200 species of Polyzoa, 

 many of which are new, others are re-described, from Goldfuss chiefly; 

 and, as Hagenow had access to the original specimens of Goldfuss, I 

 think we may pretty safely rely npon his judgment in the redistribution 

 of types. The classification of the author is very simple. For a portion 

 of the Cyclostomata, Busk, Hagenow adopted the division A, Tebuli- 

 porina, Milne-Edwards ; for another portion he adopted Bronn's division 

 B, Cerioporina. His division C, Salpingina embraces only two doubtful 

 genera — Escharites, Rom., and Inversaria, Hag. — which in one sense may 

 be considered as passage forms ; still it is very doubtful whether some of 

 the Salpingina do not belong rather to the Cyclostomata than to the 

 Cheilostomata. The group D, Urceolata, Hag., are Cheilostomatous. 

 Except that I shall begin with the latter groups — C and D — first, I shall 

 not otherwise disturb the arrangement of the author ; but I have not 

 thought it necessary to load my text with reference to all the plates, 

 especially as the species are numbered. 



