298 NATURAL HISTORY OP 



Tubulipora incurvata {T. H.) , Alecto incurvata {T.H.). 



Hab. : Guernsey {A. M. N.), Hebrides {G. W. P.). 



A deep-water species, about ^ inch in length. The 

 zocBcia are biserial, punctate, and free, and extend 

 outwards at the oral orifices. Sometimes only a single 

 row of cells is developed. 



7. S. DiASTOPORiDES, Novman. 



8. S. COMPACTA, Norman. 



Two deep-water species from Shetland, described 

 by the Rev. A. M. Norman in the Reports of the Brit. 

 Assoc, 1866 (1867), 204, and 1867 (1868), 310. 8. 

 diastoporides is the largest British representative of 

 this genus. 



9. S. INCRASSATA, Smitt. 



Tubulipora incrassata {Smitt), Alecto retiformis 

 {T. K). 



Hab. : Salcombe, Cornwall {T. H.), Guernsey, Shet- 

 land (A. M. N.). 



This species forms patches of incrustations on shells. 

 The zoaria are white and much branched, the branches 

 anastomosing so as to form reticulations. The zocecia 

 are bi- or tri-serial, with the orifice erect and free. 



10. S. DEFLEXA, Couch. 



Tubulipora deflexa {B. Q. C), Pustulipora deflexa 

 (G. J., T. H., Bush, Joliet, McA.). 



Hab. : Cornwall {K Q. C), Wick (C. W.P.). 



"Zoarium erect, cylindrical, with waved tubes pro- 

 jecting from all directions." It is white in colour, and 

 dotted all over, and the zooecia are irregularly placed, 

 and are uni- or bi-serial. 



U.S. FDNGIA, Couch. 



Tubulipora fungia (E. Q. C, Smitt, Bush, McA.), T. 

 penicillata {G. J., D.L., Aid., T.E.). 



