1. DISCOPORELLA. 83 



9. Discoporella mediterranea, Blainville. (Plate XXXIV. fig. 4.) 



Zoarium orbicular, umbonate, but hollowed in the centre, around 

 which the cells are arranged in short multiserial rays, most of which 

 do not reach the border of the disk; entire surface reticulate. 

 Mouths of cells and openings of cancelli of equal size and almost 

 indistinguishable. 



Lichenopora mediterranea, Blainv. Man. (VActinol. p. 407 (no figure 



or description); Michel in. Icon. (1844), p. 68, pi. xiv. fig. 5. 

 Actinopora mediterranea, If Orb. Prodr. iii. p. 188 (1847). 

 Unicavea mediterranea, id. ib. p. 971 (1852). 



Hub. Mediterranean, on shell (E.M.S. 'Porcupine,'' Blainville, 

 Michelin, B'Orbigny). Fossil, Miocene : Astezan, Asti, Vaucluse. 



10. Discoporella holdsworthii, n. sp. (Plate XXX. fig. 4.) 



Discoid, convex, bordered ; cells uniserial, two to six in each 

 series ; orifice elliptical, jieristome pointed on the lower side. 

 Central area wide, with numerous large circular stellate pores. 



Hab, Ceylon, on dead shell {Holdsworth). 



Other species noticed by Authors. 

 11. Discoporella convexa, D'Orb. 



" Very convex above ; cells in irregular lines, very slightly pro- 

 jecting; intermediate pores very distinct and numerous." 



Unicavea convexa, D'Orb. I. c. p. 972. 



Hab. Coast of Calvados. 



12. Discoporella novae-hollandise, D'Orb. 



" Much depressed ; rays wide apart, much raised and very wide, 

 vnth. two ranges of intermediate pores." 



Unicavea novse-hollandife, D'Orb. I. c. p. 971. 



Hab. Bay of Chiens-Marins (? Seal Bay), New Holland. 



13. Discoporella complanata, Meneghini. 



" Discoid, flat, not hollowed in the centre ; the whole surface 

 furnished with rows of tubes radiating from the centre towards the 

 periphery ; tubes slightly curved, of almost equal length." 



Tubulipora complanata, Meneyliini, Polipi dell. Famiglia dei Tuhuli- 



porani, jinora osservnti neW Adriatico, 1844, p. 5. 

 Discosparsa complanata, Heller, I. c. p. 122. 



Hab. Adriatic. 

 Probably =D. radiata. 



