40 THE INVERTEBRATE FAUNA 



shells. We have also taken it at low 

 water on Cramond Island. 



Alcyonidium hirsutum (Flem.). 



On Fucus serratus, Firth of Forth (MR) ; 



Entrance to Firth of Forth, 30 fathoms 



(K). 



We dredged this species last summer off 



Aberlady Bay in 9 fathoms. 



A. mytili (Dalyell). 



We have taken this species in the Firth. 



A. parasiticum (Flem.). 



Firth of Forth (MR) ; Firth of Forth 

 (Ed. Mus.) ; entrance to Firth of Forth, 

 30 fathoms; Firth of Forth, 24 fathoms; 

 Bass Kock, 24 fathoms (K). 

 We have obtained this species north- 

 east of Inchkeith, 12 fathoms ; west of 

 Inchkeith, 5 fathoms; off Aberlady Bay, 

 9 fathoms ; Kirkcaldy Bay, 9 fathoms ; 

 off Aberdour, 5 fathoms; and frequently at 

 Newhaven. It is common in the Firth. 



A. polyoum (Hassall). 



Firth of Forth (MR). 



The Sarcochitum polyoum of Johnston 



and others. 



FLUSTRELLID.E. 

 Flustrella hispida (Fabr.). 



On Fucus serratus, Firth of Forth ( M'B.). 

 Common on Fucus at low water mark, 

 Aberdour. 



VESICULARIID^E. 



Vesicularia spinosa (Linn.). 



Firth of Forth (MR); Leith shore (D. 

 Landsl., jun). 



We have dredged this species in abund- 

 ance west of Inchkeith in 5 fathoms, and 

 have obtained it frequently from the 

 dredges at Newhaven. It is often found 



