196 Proceedings of the Boyal Physical Society. 



LIST OF SPECIES. 



PORIFEEA. 



I. Calcarea — 



Grantia compressa (Fabr.). 



G. ciliata (Fabr.). 



Leucosolenia hotryoides (Ell. and Sol.). 



Z. coriacea (Flem.). 



II. SiLICEA — 

 Cliona celata (Grant). 



In Pecten opercularis. 

 Halichondria panicea (Pall.). 

 Dysidia fragilis (Mont,). 

 A few specimens which I am unable to determine. 



GOELENTEBATA. 



HYDROIDA. 

 I. Athecata — 



Clavid^. 

 Clava multicornis (Forsk,). 



Litt., on Fucus, etc. 



HYDRACTINIIDiE. 

 Hydractinia echinata (Flem.). 



Always on shells inhabited hy Pagurus. Sta- 

 tions 5, 9, 11; also upper lam., King's Cross. 



CORYNID^. 



Coryne pusilla (Gaertn.). 



Litt., on Fucus, etc. 

 G. vaginata (Hincks). 



Litt., in rock pools. King's Cross. 

 Syncoryne sarsii (Lov^n.). 



Litt., King's Cross. 



EUDENDRIIDiE. 

 Eudendrium rameum (Pall.). 



Stations 2, 6. 

 E. ramosum (Linn.). 



Stations 4, G, 7. 



