NATURAL HISTORY NOTES FROM TARBERT. 373 



spring tides ; but it appears to be scarce, though 

 possibly it may be of general occurrence around 

 our shores. It is readily distinguished by the long 

 external antennse and caudal appendages. I have 

 not met with it far above low water ; and its colour 

 mimics so well the stones which it frequents, that 

 if the creature had the sense to remain perfectly 

 still, sharp eyes would be required to see it. Its 

 scarceness may therefore be more apparent than 

 real. 



This species was exhibited to the Society on 26th 

 March, 1861, by Mr. David Kobertson, F.L.S., F.G.S., 

 from the Cumbraes, " being an addition to the list 

 of Crustacea found in that locality " ; * but no 

 Scotch locality is given in the second volume of 

 Bate and Westwood's British Sessile-eyed Crustacea^ 

 although that work was not published till seven 

 years after. No locality is given in White's Popular 

 History of British Crustacea. 



Philoughria rosea, Koch. — I obtained this isopod 

 a few days ago at Tarbert, near the Marine 

 Laboratory of the Fishery Board for Scotland. 

 On turning over a piece of wood that was lying 

 about 20 yards above high-water mark, I noticed 

 beneath it a "slater" with which I was unfamiliar. 

 On examination it proved to be the species men- 

 tioned above. 



Its colour was white, with a dark brownish-black 

 band down the middle of the back, on each side of 

 which was a band of a fine red colour. None of the 

 bands were very broad, nor had a very decided out- 

 line ; they all showed rather a tendency to shade off 

 into each other. The only ajDparent discrepancy was 

 in the colour of the eyes, which are said to be black 

 in P. rosea, whereas those of my specimen were red. 



According to Bate and Westwood's description, 

 this species would appear to be very restricted in 

 its distribution in Britain, the only record of its 



* Proceedings, Nat. Hist. Soc. Glasg,^ i. 12. 



