M. K. A. Zittel on Fossil Oahispongice. 71 



17. Siphonoccelia tenuicula, Loriol, Urgon. Land. pi. iv. 

 fig. 9. Urgonian. 



18. Siphonoccelia cyathiformis, Lor. ib. pi. iv. figs. 10-12. 

 Urgonian. 



19. Disccelia Gillieroni, Lor. ib. pi. iv. figs. 16-18. Ur- 

 gonian. 



20. Disccelia flabellata, Lor. ib. pi. iv. figs. 19-21. Ur- 

 gonian. 



Hippalimusjlabellatus, D'Orb. Prodi*, ii. p. 97. 



21. Disccelia Cotteaui, Lor. ib. pi. v. figs. 1-3. Urgonian. 



22. Scyphia /areata, Golf. Taf. ii. fig. 6. Tourtia. 



23. Spongia multidigitata, Mich. Ic. pi. Ii. fig. 9. Ceno- 

 manian. 



24. Scyphia micropora, Rom. Kr. Taf. ii. fig. 6. Seno- 

 nian. 



Elasmoccelia, Rbmer. 



Elasmojerea, From. 



Sponge consisting of one or several arched laminae, more or 

 less grown together, which are pierced throughout their whole 

 longitudinal axis by numerous round stomachal cavities of 

 equal thickness. These tubes are placed in one or more rows ; 

 and their round orifices are situated at the upper margin. 

 Radial canals wanting. Skeletal fibres coarse. Surface and 

 walls of the tubes porous. 



This genus was first described by Fromentel (Introd. p. 34) 

 under the name of Elasmojerea ; but F. A. Romer showed that 

 it had nothing to do with Jerea, but must be placed near 

 Siphonoccelia. He therefore altered the name to Elasmoccelia. 

 Although Romer's E. sequana is not identical with Fro- 

 mentel's Elasmojerea sequana, but belongs .to Peronetta du- 

 mosa, From., the remark is nevertheless correct that the 

 Elasmoccelice consist only of Peronellce serially arranged and 

 grown together by their sides. They perhaps form only a 

 section of Peronetta, coming nearest to P. dumosa ; but the 

 external habit is so peculiar that I would retain the genus 

 Elasmoccelia. 



All the species are from the Lower Cretaceous. 



1. Elasmojerea sequana, From. Intr. pi. ii. fig. 3. Neo- 

 comian. 



2. Elasmojerea crassa, From. Cat. Rais. pi. ii. fig. 10. 

 Neocomian. 



3. Elasmojerea plana, From. ib. pi. ii. fig. 9. Neocomian. 

 ?4. Elasmojerea irregularis, From. ib. pi. ii. fig. 8. Neo- 

 comian. 



