JOTTINGS FROM MY NOTE-BOOK. 221 



Leaving out of account one or two imperfect and 

 doubtful specimens, we have twelve genera and 

 thirteen species represented. 



I may remark that in all the tow-netting I have 

 had the privilege of seeing in the yacht Medusa 

 during two or three seasons, I do not remember of 

 noticing an amphipod taken in the tow-net in the 

 Firth of Clyde at a greater depth than a fathom or 

 two under the surface. Parathemisto oblivia, as 

 stated, is abundant in the Firth of Forth ; in the 

 above haul there were taken over 100 of that species, 

 and in other hauls at various depths they were more 

 or less abundant. In the Firth of Clyde I have only 

 met with it at Sanda Bay, near the Mull of Kintyre, 

 where a single specimen was obtained in a gathering 

 by the surface-net after sunset. Anonyx gulosus 

 and Iphimedia obesa also appear to be much more 

 plentiful than in the Firth of Clyde, where the latter 

 species is seldom if ever taken in the tow-net. 

 Ampelisca Gaimardi is larger than I have seen it in 

 the Firth of Clyde. Hcdimedon Millleri is recorded 

 in the Rev. Canon Norman's Museu/tn Normaniamcin, 

 but not in Bate and Westwood's History of British 

 Sessile-eyed Crustacea. Metopa gregaria is new to 

 Britain. 



Remembering that in this result there is taken 

 into account only one group obtained in one haul, 

 I am doubtful if as many different species of 

 amphipods (thirteen in number, representing twelve 

 genera) were ever taken at one haul in the Firth of 

 Clyde, either by the dredge or tow-net. We are 

 therefore led to believe that that class of inverte- 

 brates is more abundant on the East Coast than on 

 the West (at least within the limits mentioned), and 

 their generally larger size seems to indicate a more 

 northern character than on the West. This view is 

 to some extent borne out by the fact that many of 

 the post-tertiary fossils on the East Coast are of a 

 more arctic character than those found on the West, 

 and the same may be said both of the fishes and 

 the sea-birds. 



