SCHIZOPOEELLA. 237 



or dendroid. Zo(ecia calcareous, destitute of a mem- 

 branous area and raised margins ; orifice ivith a sinus 

 on the lower lip. 



The oral sinus^ as Sraitt has remarked^ is the representa- 

 tive of the median pore in the preceding family. 



Genus SCHIZOPORELLA, Hincks. 



Der. From axi^M, I divide, and Tropos, an opening. 



Lepralu (part.), Johnston : Busk : &c. 



EscH.4RiNA (part.), D'Orbigny. 



Reptoporina (part.), id. 



EscHAUELLA, Subgenus HerentiA (part.), Smitt, Kritisk Forteckn. 



MoLLiA, Smitt, ibid. 



HiPPOTHOA (part.), id. Floridan Bryozoa, 



Generic Character. — Zocecia with a semicircular or 

 suborbicular orifice, the inferior margin with a central 

 sinus. AvicuLARiA usually lateral, sometimes yyiedian, with 

 an acute, or rounded, or spatulate mandible ; occasionally 

 loanting. Zoariu.vi {in the British species) incrusting, or 

 {^occasionally) forming foliaceous expansions. 



I REGRET that I cannot adopt Prof. Smitt^s name 

 for this group, which he was the first to define. But 

 the Hippothoa of authors is not^ in my judgment, super- 

 seded or merged in other genera ; and the name must 

 therefore be retained with its original application. I am 

 not aware that there is any other existing designation 

 which has any special claim to the vacant place, or, indeed, 

 which could be employed without the risk of creating 

 confusion. 



