SCHIZOPORELLA. 237 



or dendroid. ZOCECIA calcareous, destitute of a mem- 

 branous area and raised margins ; orifice with a sinus 

 on the lower lip. 



THE oral sinus, as Smitt has remarked, is the representa- 

 tive of the median pore in the preceding family. 



Genus SCHIZOPORELLA, Hincks. 



Der. From a-^i^ia, I divide, and Tropos, an opening. 



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



ESCHARINA (part.), D'Orbigny. 



REPTOPORINA (part.), id. 



ESCHARELLA, subgenus IlEKEXTiA (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 median, with 

 an acute, or rounded, or spatulate mandible ; occasionally 

 wanting, ZOARIUM (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. 



