268 Proceedings of the Royal Physical Society. 



XV. The Invertehrate Fauna of the Firth of Forth. By George 

 Leslie, Esq., M.B., CM. ; and W. A. Herdman, Esq., 

 D.Sc, F.L.S. Part III., comprising the Porifera, 



COELENTERATA (pars), VERMES, PyCNOGONIDA, and 

 MOLLUSCA. 



(Read 20th April 1881.) 



PORIFERA. 



The nomenclature of the Fibrous Sponges adopted in this 

 article is that of Professor Oscar Schmidt, as given in his 

 "Grundziige einer Spongien-Fauna des Atlantischen Gebietes," 

 Leipzig, 1870. A number of the specimens we have found 

 in the Forth are not yet identified. 



CALCAEEA. 



Grantia comprcssa (Fabr.). 



Not uncommon in the littoral zone. We 

 have obtained it at Elie, Wardie, and in 

 other parts of the shore on both sides 

 of the estuary. 



G. ciliata (Fabr.). 



Frequent on roots of Laminaria, in the 

 lower littoral zone, at North Berwick, etc. 



Leuconia nivea (Grant). 



Under surface of sheltered rocks, Preston- 

 pans Bay (Flem.). 



We have obtained this species at Aber- 

 dour, and near Elie. 



FIBEOSA. 



CHALINIDiE. 



Chalinula oculata (Pallas). 



We have found this species on the pier at 



Newhaven. It is the Chalina oculata of 



Bowerbank. 

 Isodictya infundihuliformis (Bowerb.). 



Firth of Forth {Ed. Mus.). 



