NOTES ON THE FAUNA OF FALMOUTH. 209 



removed, and the hands were busily engaged removing the 

 barnacles, weed, and other foreign growths from the exterior of 

 the vessel. These crabs probably took shelter lower down the 

 vessel or else deserted her, for after this partial cleaning no more 

 were seen. 



The surface temperature of the sea during the week these 

 crustaceans were so numerous on the sides of this vessel was 

 67 °F., a warmth to which they seemed quite accustomed, for they 

 were very agile. 



The specimens I secured for reference varied considerably in 

 size; the largest measuring 17 m.m. across the carapace, the 

 smallest 8 m.m. 



In habits, Nautilograpsus minutus reminds one very much 

 of the Portunidae. When an individual is isolated in a pan of sea- 

 water, it is seldom at rest ; but if a bunch of sea-weed is 

 introduced it at once takes shelter within it. This fact clearly 

 indicates its normal habitat, viz. : in the floating Saragossa 

 sea-weed. 



REFERENCES. 



1. The Cornish Fauna. By J. Ceuch, with revisions and additions, 1878. 



Royal Institution of Cornwall. 



2. Gourret, Paul. Sur les Peridiniens duGolfe de Marseille. 



Ann. du Musee D'Hist. Nat. de Marseille. 

 Zoologie. Tom, 1^^, Memoir No. 8, 1883. 



3. Hodgson, T. V. Faunistic Notes. Jour. Marine Biological Asso- 



ciation, Vol. IV (n.s.) 1895-97. 



4. Vallentin, R. Some notes on the Pelagic life occurring in the sea 



near Falmouth, &c, Jour. Royal Institution of 

 Cornwall, Vol. XII, Part II, 1894-95. 



