LICHENOPORA HISPIBA. 473 



1. Colony simple ; or composed of many confluent disks. 

 (Radiopora, D'Orbii/ny.^ 



LicHENopoRA HispiDA^ Pleming. 



Plate LXVIII. figs. 1-8. 



DiscoroKA iiisriDA, Flem. B. A. 530: i?/a»; y. Actiuol. 44G : Couch, Curii. 



Faun. Jit. iii. 109, pi. xix. fig. 1. 

 TiiBULii'ORA iiispiDA, Joknsf. B. Z. eel. 2, 268, pi. xlvii. figs. 9-11 (bad). 

 DiscopoRELLA iiisriDA, Gray (subgen.), B.M. Rad. 138 : Busk, Crag Poljz. 



115, pi. xviii. fig. 5; id. B.M. Oat. iii. 30, pi. xxx. fig. 3: 



Smitt, loc. cit. 406 & 483, pi. xi. figs. 10-12 : Surs: Alder: &c. 

 DiscocAvEA (Liciienopora) aculeata, UOfhigny, loc. cit. 958, pi. dcclxxvi. 



figs. 5-8. 

 ? Heteroporella radiata, BitsJc, Crag Pol. 127, pi. xix. fig. 2. 

 Heteroporella nispiDA, Hincks, Dev. Cat. loc. cit. 469. 



Zoarium closely adherent, or sometimes with the lamina 

 turned nj) and the border free, subcircular and simple, 

 frequently subconical ; or irregular in shape, often of 

 large size, and composed of many confluent disks, the 

 surface mamillated. Zooecia for the most part arranged 

 in radiating series around a central space of larger or 

 smaller size ; the orifices somewhat raised, tubular, the 

 upper margin produced and often trifid, sometimes 

 simply acuminate ; the interspaces between the rows, 

 and the central area, covered with large circular stellate 

 pores. 



Polypide with 10 short tentacles, slightly everted at the 

 extremities. 



Var. a {meandrina, Peach). Zoarium composite, of large 

 size, with the central spaces often elongate and winding 

 or sinuous ; the orifice of the zooecia with a single 

 slender mucro ; the pores large, forming " hexagonal 

 depressions," and generally not stellate. 



Var. /3. Zoarium composite, the surface thickly covered 

 with small oval mamillpe, somewhat regularly disposed; 



