226 Dr. J. W. Gregory — A Revision 



Stomatopor a pirensis, ttallon, 1861, M6m. Soc. Emiil. Uoubs, ser. 3, 



t. vi. p. 211. 

 Stomatopora corallina (Pd'Orb.), id. 1861, ibid. p. 210. 

 Stomatopora Waltoni (pars.). Vine, 1884, Quart. Journ. Geol. Soc. 



vol. xl. p. 787, fig. 2 b (nou 2 a). 



Diagnosis. — Zoarium of uniserial zooecia branching diclio- 

 tomously or irregularly. Typically it is very loose. Long 

 unbranched series occur. Crowded varieties with tufted ends 

 to the branches also occur. 



Zooecia at first regularly cylindrical, but soon becoming 

 pyriform or subpyriform ; obscurely transversely ridged ; 

 surface punctulate. 



Peristomes slightly raised, usually not on the median line. 



Ooecia unknown. 



Distribution. — England : Inferior Oolite to Corallian. 

 Foreign : Bajocian to Corallian ; France, Germany, and 

 Austria. 



3. Stomato2)ora Waltoni, Haime. 



Stomatopora Waltoni, Ilaime, 1854, M4m. Soc. geol. France, s^r. 2, 



t. vi. p. 162, pi. vi. figs. 3 a and b. 

 Alecto bajocensis, d'Orbigny, 1849, Prod. Pal. t. i. p. 288. 



Diagnosis. — Zoarium of uniserial zooecia forming delicate, 

 radiating, and very divergent lines ; these branch repeat- 

 edly, occasionally interlace, and end in loose tufts. 



Zooecia long, cylindrical, and very thin ; transversely 

 ridged. 



Peristomes have tliickened rims, but are not reflexed. 



Distribution. — England : Fuller's Earth to Cornbrash. 

 Foreign : Bajocian, l^'rance. 



4. Stomatopora Smithi (Phillips). 



Cellaria Smithi, Phillips, 1829, Geol. Yorks. pt. i. p. 143, pi. vii. fig. 8. 

 Hippothoa Smithi, Morris, 1843, Cat. Brit. Foss. p. 39. 

 Alecto Smithi, d'Orbigny, 1849, Prod. Pal. t. i. p. 317. 



Diagnosis. — Zoarium hippothoiform, uniserial ; branches 

 crowded and irregular ; entirely adherent. 



Zooecia pyriform ; long slender proximal ends ; front wall 

 well raised, rounded, and punctate ; orifice small, circular, 

 surrounded by a low rim. 



Peristomes slightly raised. Flat regular rims surround each 

 of the zooecia. 



Distribution. — Adherent to Cardium citrinoidum. Corn- 

 brash, near Scarborough. Only the type specimen known. 



