ORDER V 



CHEILOSTOMATA 



351 



Vibracclla Waters {Flustrellaria, p.p., d'Orb.). Differs from Onychocella in having 

 a larger aperture, wliich is often somewhat expanded below, and having vibracular 

 cells instead of avicularia. Cretaceous and Tertiary. 



(?) Gumulifora Miinst. (Fig. 517). Zoaria irregularly massive. Zooecia partly 



M i li 



B 





vfxrX : Mii't^' 



:j^.^ 



;JJ- 



^^>^3i^ilp^. 



Fig. 517. 



Cwmulipora angulata '^lixn^i. Oligocene ; Dobevg, near Biinde. ^-1, Zoarium, natural size. B, Upper 

 surface, enlarged. (', Vertical section, enlarged (after Reus.s). 



recumbent, partly erect, and jjlaced one above the other, so tliat they appear to form 

 tabulated tubes. Tertiary. 



Floridina Jullien. Like Onychocella liut opesium trifoliate. Cretaceous to 

 Recent. 



Smittipora Jullien ; ' Euritina Canu. Cretaceous to Recent. 





-^ 



i: 



Family 9. Microporidae Smitt. 



Zooecia having the front wall entirely calcareous ; usually with sharply elevated 

 margins, fissures or perforations. Cretaceous to Recent. 



'Mr 



Micropora Gray (Fig. 518). Zoaria encrusting. Zooecia with 

 prominent raised margins; the front depressed, with a perforation 

 at each upper angle below the semicircular or rounded orifice. 

 Cretaceous to Recent'. 



Steganoporella Smitt ; Setosella Hincks ; Rhagasostoma Kos- 

 chinski ; Cupularia Lam. ; Gargantua Jullien. Tertiary to Recent. 



Suborder B. ASCOPHORA Levinsen. p^g- ^is- 



Micropora disparilis 



Compensation sac present, opening most often on the proximal side ^jg^g^g -^'anta^ar- 



of the operculum, more rarely further bara Co., Cai. Zooecia 



7 7 ,7 7 7. / s highly magnified 



back through ct, median pore {ascopore). (after Gabb and 

 A calcified transverse bar between the Horn). 

 opercular and sub-opercular areas. 



Family 10. Microporellidae Hincks. 



Zoaria encrusting or erect, foliated or dendroid. 

 Zoa'cial orifice more or less semicircidar, with the loioer 

 margin entire ; a crescentic or circular pore on the front 

 wall usually just beneath the orifice. Cretaceous to Recent. 



Fio. 519. Microporella Hincks (Fig. 5 1 9). Zoarium encrusting 



Micropordia rudis (Reuss). Oli- or erect, bilamiuar. Margin of zocccia not elevated. 



ocene ; &'■"■' ^^ ' — 



enlarged. 



gocene ; Siillingen. Upper surface, .,^ -r. .,i , • i , j_- i in e ,j-i 



" ■ ° ^* ' Orifice with a straight, entire lower border, frequently 



