SCHIZOPORELLA HYALINA. 271 



ricli colour, which is tolerably preserved in dead speci- 

 mens, is a good specific mark. 



The orifice in young cells is slightly sinuated in front ; 

 and this character allies the species to the present group; 

 but it is singularly destitute of striking structural features. 



SCHIZOPORELLA HYALINA, LinnffiUS. 

 Plate XVIII. figs. 8-10. 



Cellepora HYALINA, Liuti. Sjst. ed. 12, 1286 : Fabr. Faun. Grcenl. 435. 



Cellepora nitida, Fabr. Faun. Groenl. 435. 



Cellepora personata, D. Chiaje, Ann. S. Vert., Mem. iii. 39, pi. xxxiv. 



figs. 17, 18 (ovicell). 

 Escharina personata, M.-Edwards, in Lamk. An. s. V. ed. 2, ii. 236, 



no. 24. 

 Berenicea HYALINA, Hciss. Ann. N. H. vii. 367. 



Lepralia cylindrica, Hass. Ann. N. H. vii. 368, pi. ix. fig. 6 (opaque var.). 

 Lepralia HYALINA, W. Thompson, Ann. N. H. v. 253 : Johnston, B. Z. ed. 2, 



301, pi. liv. fig. 1: Busk, B.M. Cat. ii. 84, pi. Ixxxii. 



figs. 1-3, pi. xcv. figs. 3-5, pi. ci. figs. 1, 2. 

 ? Cellepora ovoidea, Lamx. Pol. Corall. flex. 89, pi. i. fig .1 ; Exp. Meth. 2, 



pi. ixiv. figs. 4, 5. 

 Celleporella HYALINA, Gray, B.M. Rad. 128. 

 Mollia HYALINA, forma HYALINA auctt., Smitf, loc. cit., Krit. Fort. iv. 16 and 



109, pi. XXV. figs. 84, 85. 



Zoop.cia elongate-ovate or subcylindrical, horizontal, di- 

 stinct, occasionally subcarinate, disposed somewhat 

 irregularly in radiating rows often separated by pimc- 

 tured spaces ; walls very thin and hyaline ; surface 

 smooth and shining, or slightly furrowed transversely ; 

 orifice terminal, orbicular^ frequently with a deep 

 sinus in front ; peristome thin, the upper margin 

 raised. Ooecia globose, prominent, punctured, often 

 rising into a boss in front; fertile cells small and 

 partially aborted, produced chiefly in the central por- 

 tions of the colony_, and developed upon the primitive 

 layer of cells. 



Polypide with 12 tentacles. 



