30 DISCOPORELLTDA'. 



Pamily V. DISCOPORELLIDJ^. 



Zoooecium discoid, sometimes confluent, adnate or stipitate. Cells 

 distinct or closely connate, intermediate surface cancellated or porous. 



Lichonoporidfe. S7)utf. 

 CaveidK (pars), D'Orb. 

 Discoporadte, Bk. Brit. Cyclop. 



a. Zoowcixm discoid, adnate. 



1. DISCOPORELLA, Gray. 



Zoarium sessile, usually closely adnate, with a thin calcareous 

 border ; discoid, raised in the centre (hemispherical, conical, or sub- 

 couical). Cells partly free, disposed irregularly or in lines radiating 

 from the centre. Mouth acuminate or toothed. 



Discoporella, Gray, List Brit. Bad. p. 138 ; Busk, Crag Polyz. p. 115 ; 



Smitt. 

 Discopora ("pars), Fleminy (noo Lamarck) ; Busk, Encyclop. Brit. 



" Polyzoa." 

 Madrepora (pars), Fahr., Esper. 

 Tubulipora (pars), Johnst., M.-Edwards, ^-c. 

 Defrancia (pars), Actinopora, Discocavea, Unicavea, &c., LfOrh. 



pars), AC 

 11a (sp.), 



Heteroporella (sp.), Hincks 



1. Discoporella hispida, Flem. (sp.). (Plate XXX. fig. 3.) 



Zoarium closely adnate, siiborbicular, or irregular, usually indi- 

 stinctly mamillated : cells scattered, mouths of cells larger than the 

 ostioles ; peristome, especially in the marginal cells, commonly pro- 

 duced on one side, and simply acuminate or divided into 2-4 aculeate 

 teeth. 



Discopora liispida (pars), Fleminy, Blaim\, Hassall, Couch. 



? ^ladrepora verrucaria (pars), Fabricius. 



Tubulipora hispida, Johvd. I. c. p. 2G9 (second paragi-aph), pi. 47. 



fig. 0_(?10, 11). 

 ? Tubulipora orbiculus, Lamarck. 

 Discopmvlla liispida, Bk. C. Polyz. p. 115, pi. xviii. fig. 5 ; Sars; 



Alder ; Smitt, I. c. p. 406, pi. xi. figs. 10-12 ; Norman, i^fc. 

 Heteroporella hispida, Hincks, Zooph. S. Devon, p. 469. 



Hah. South coast of Britain ; Etretat, France ; North Sea and 

 Arctic Ocean, 20-40 fathoms ; Norway, Finmark (Smitt), &c. 



Mr. Hincks (whose opinion is entitled to very great weight) and 

 Mr. Holdsworth appear to entertain the opinion that Discoporella 

 hispida should be referred to Heteroporella (mihi) ; and in one 

 sense, perhaps, they are right. I now think, however, that that 

 genus as exemplified in the Crag form H. radiata, should be abo- 

 lished, and that species be regarded merely as a much-worn Disco- 

 forella. At any rate there can be little doubt that in the true 



