160 



HAPLOCECIA. 



Ptistulopora quenstedti, "Waagen, 1868, Zone Amm. sowerbyi: Oeogn. PaLBeitr. 



Bd. i. Ht. 3, p. 641, pi. xxxii. fig. 10. 



,, ,, Lepsius, 1875, Beitr. Juraf. Unter-Elsass, p. 28. 



,, ,, Branco, 1879, Unt. Dogger Deut. Loth.: Abh. geol. 



Specialk, Elsass-Loth. Bd. ii. Ht. 1, p. 154. 



DIAGNOSIS : 



Zoarium tufted, loose, and irregular. Branches of medium 

 thickness. 



Zocecia in regular, horizontal, closely adjoining series. Usually 

 hexagonal and bisymmetrical, but variations in growth pressure 

 render some irregularly polygonal. Aperture transversely ellip- 

 tical. Peristomal area slightly raised. Front wall punctate. 



DISTRIBUTION. 



BRITISH : 



Cornbrash: Islip (fide Phillips). 

 Forest Marhle : Islip (fide Phillips). 



Bathonian Millepore Limestone : Gristhorpe, Lyon's Nab, "Westow, etc. 

 Inferior Oolite : loc. ? Holl Coll. ; near Stroud (fide 



Witchell) ; Coombe Hill, near Banbury. 

 FOREIGN : 



Bathonian : Banville, Calvados. 



Bajocian Zone of Sonninia sowerbyi : Elsass. 



Zone of Harpoceras humphriesianus : Mietesheim, Elsass. 



Affinities. This species was figured so imperfectly by Phillips, 

 that it has been variously interpreted by foreign authors. The 

 figure (No. 12), from a specimen in the York Museum, shows its 



FIG. 12. Part of zoarium of type specimen of Haplocecia straminea (Phil.). 

 York Museum. 



hexagonal zocecia and small orifices. Haime has referred to this 

 species a specimen which is here regarded as a Spiropora annulosa, 

 Mich. 



The figures (Fig. 11, p. 158) from a specimen from Ranville show 

 the typical characters of this species, and also the varying aspect 



