74 Proceedings of the Boyal Physical Society. 



and various lists and notices by Professors AUman, Forbes, 

 Jameson, Drs Fleming, M'Bain, George Johnston, F. E. 

 Schulze, and others. 



In our own investigations, comprising shore-collecting and 

 dredging from fishing boats and steamers, extending over 

 several years, we have taken the great majority of the species 

 of Hydroids recorded as having been found in the Firth of 

 Forth, and have been fortunate enough to discover several 

 which have not hitherto been met with in this area. Our 

 most notable deficiencies are among the minute Athecata 

 discovered by Wright. 



HYDROIDA. 



I. Athecata — 



ClAVIDtE. 



Clava multicornis (Forsk.). 



Firth of Forth {T. S. W.) ; Kincardine to 



Fifeness {M'B.) ; Kincardine, 2 fathoms 



{Th) ; Firth of Forth {G. J. A.). 



This species is common between tide 



marks on various parts of the shore. We 



have taken it at Joppa, at Wardie, and at 



South Queensferry. 



It is the Clava repens of Wright {Proc. 



Roy. Phys. Soc, Edin., 1857 ; Ed. Neiu 



Phil. Jour., July 1857). 

 C. squamata (Mull). 



Queensferry on Fucus vesiculosus {T.S. W.) ; 



Craigflower {G. J. A). 



In Dr Wright's paper on Clctva this 



species figures as C. memhranacea {Ed. 



New Phil. Jour., July 1857). 

 a nodosa (T. S. Wright). 



Queensferry and Largo, on Delesseria san- 



guinea {T. S. W.). 



This species was first described in Proc. 



Boy. Phys. Soc, Edin., for 1862. 

 Turris neglecta (Lesson). 



Queensferry (T. S W.). 



