OF THE FIRTH OF FORTH. 39 
Crisia eburnea (Linn.). 
Firth of Forth (Z2.). 
C. denticulata (Lamk.). 
Firth of Forth (AZ‘2.). 
Not uncommon in the Firth. We dredged 
it last summer, south-west of Inchkeith, 
in 5 fathoms; off Aberdour, in 5 fathoms ; 
and off Aberlady Bay, in 9 fathoms, 
TUBULIPORID. 
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 (/6.). 
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 Alge, Firth of Forth (/‘B.). 
LICHENOPORID&. 
Lichenopora hispida (Flem.). 
On Algze, Firth of Forth (W‘B.). 
L. radiata (Audouin). 
Firth of Forth (C. W. P.). 
CTENOSTOMATA. 
ALCYONIDIID. 
Alcyonidium gelatinosum (Linn.). 
Bass Rock, 24 fathoms (X.); Firth of 
Forth 8B.) ; Firth of Forth (Zd. Mus.) ; 
off the Isle of May (nob). 
This species is common in the Firth, 
in a few fathoms, attached usually to dead 
