REVISION OF L.M.B.C. AMPHIPODA. 307 



occur " among his Shetland specimens examined by 

 Spence Bate when engaged on his work." 



Guernea coalita (Norman, Ann. and Mag. N. H., Ser. 4, 

 Vol. II., 1868). 



Off Great Orme's Head, 1/4/90 ; 25 miles S.E. of Calf, 

 6/6/92; Off Port Erin 15 to 20 f., 24/3/94; 2 miles S.E. 

 of Kitterland, 17 f., 27/5/94. Length If mm. 



Gammabim:.* 



Melphidippella macera (Norman). 



8 miles W. of Flesh wick Bay, 33 f., 5/6/92 ; 7 miles W. 

 of Bradda Head, 31 f., 25/4/95. Length 5 mm. 



Amathilla homari (Fabricius) =Amathilla s<z5mi(Leach) . 



The young of this species is one of the commonest 

 Amphipoda on our coasts, in tidal pools during spring and 

 early summer. I cannot doubt that A. angulosa (Bathke) 

 is this young form. The large females measuring 26 mm. 

 in length come to the shore in early spring to deposit their 

 young and may then be taken among Algae. The young 

 at first have no dorsal carina which is only developed by 

 degrees ; in their earliest stage these are Grayia imbricata 

 (Bate). "The largest I have of the young form is 9 mm. 

 long, nor have I have ever seen one between these sizes. 



Gammarus marinus, Leach. 



Puffin Island ; Hilbre Swash ; Colwyn Bay ; Port Erin 

 Harbour. Length 16 mm. 



Gammarus locusta (Linne). 



Common everywhere on the shore under stones between 

 tide marks. Length 25 mm. 



Gammarus pulex (De Geer). 



In brooks and springs up to 700 feet above the sea. 

 Length 16 mm. 



* For the Gammarid;e see a valuable paper by Canon A. M. Norman in 

 Ann. and Mag. N. H., Ser. 6, Vol. 4 (1889). 



