1900 



DU CRETACE FIGURES PAR D ORBIGNY 



381 



G. Foveolaria Busk. 1884. 



« Zoarium erect, branched and cylindrical or foliaceous and 

 bilaminar. Front of Zoecia 

 with a thick granular bor- 

 der very deeply imbedded in 

 a pit formed by tlic thicke- 

 ning of tlie gênerai ectocyst. 

 A sessile amcularium imme- 

 diately below or in front 

 of the loiver border of the 

 pit. » Un amcellaire sessile 

 ectocystal devant l'area. Ac- 

 tuel. 



Type : P. elliptica Busk 



(Fig. 21). Fig. 21. — Foveolaria Busk. — Type 



F. eUiptica (Busk). 



G. Bathypora M. Gill. 1889. 



Zoarium encrusting. Zoecia in longitudinal séries, quadrate, separa- 

 ted by raised Unes ; lower part calcareous, convex, much projecting, 

 smooth, and imperforate ; area occupyng the whole width of the upper 

 part, deep, membranous, inith a narrow, smooth lamina below. » 

 Actuel. 



Type : B. porcellana M. Gill. (Fig. 22). 



Fig. 22. — Bathypora M. 

 Gill. — Type : B. por- 

 cellana (M. Gill.) (d'a- 

 près Hincks). 



Fig. 23. — Hei£rœ- 

 cium Hincks. — 

 Type : H. arnplec- 

 tens (Hincks). 



