OF THE FIRTH OF FORTH. 39 



Crisia eburnea (Linn.). 



Firth of Forth (MR). 



C. denticulata (Lamk.). 



Firth of Forth (MR). 

 Not uncommon in the Firth. We dredged 

 it last summer, south-west of Inchkeith, 

 in 5 fathoms ; off Aherdour, in 5 fathoms ; 

 and off Aberlady Bay, in 9 fathoms. 



TUBULIPORIM. 



Stomatopora dilatans (Johnst.). 



Firth of Forth (C. W. P.). 



S. incurvata (Hincks). 



Outside the Isle of May (C. W. P.). 



Idmonea serpens (Linn.). 



On Zoophytes, Firth of Forth (MR). 

 We dredged this species to the north-west 

 of the Isle of May in 26 fathoms. 



Diastopora patina (Lamk.). 



On the fishermen's lines, Newhaven 

 (C. W. P.); south-west of Inchkeith, 

 5 fathoms (nob.) ; on shells, Zoophytes, 

 rocks, and Algae, Firth of Forth (M'R). 



LlCHENOPOBHXffl. 



Lichenopora hispida (Flem.). 



On Algse, Firth of Forth (MR). 

 L. radiata (Audouin). 



Firth of Forth (C. W. P.). 



CTENOSTOMATA. 



ALCYONIDIID^E. 

 Alcyonidium gelatinosum (Linn.). 



Bass Eock, 24 fathoms (K); Firth of 

 Forth (MR) ; Firth of Forth (Ed. Mus.) ; 

 off the Isle of May (nob.). 

 This species is common in the Firth, 

 in a few fathoms, attached usually to dead 



