306 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Paratylus falcatus (Metzger). 



Little Orme ; Colwyn Bay. White with a red spot on 

 the back of each segment except the fourth pleon. Length 

 5 mm. 



Para^Zws«mcwia£ws(Sars,OversigtafNorg.Crust.,p.l02). 



Eed Wharf Bay, Anglesea, 20 f., 8/6/89. This species 

 which has been accidentally united by Sars in his Norwe- 

 gian Amphipoda with the preceding, differs from it only 

 in not having the pleon segments furnished with dorsal 

 teeth. The species figured in the above work is this form 

 and not Metzger's. The difference does not appear to be 

 one of age or sex. Length about 5 mm. 



Paratylus vedlomensis (Bate). 



Puffin Island — low water ; Port Erin Harbour, electric 

 light, &c. ; 8 miles W. of Eleshwick Bay, 33 fathoms ; 3 

 miles W. of Calf of Man, 19 f. (Galley Head). Length 

 8 mm. 



Dexamine spinosa (Montagu). 



Common throughout the district ; shore to 10 fathoms. 

 Length 15 mm. 



Dexamine thea, Boeck. 



Port Erin Harbour, 4/6/92, several. Length 4| mm. 



Tritceta gibbosa (Bate). 



Colwyn Bay ; Anglesea Coast ; Puffin Island and Port 

 Erin encysted in the outer integument of Ascidians ; 16 

 miles N. of Holyhead 40 to 50 fathoms ; Menai Bridge 

 very abundant ; adult males at electric light, Port Erin, 

 21/4/89. Length 5 mm. It is remarkable that the emar- 

 gination of the ant. margin of prop, of the first gnath. in 

 the adult males of this species which caused Nebeski to 

 make a distinct species of it (T. dolichonyx) should have 

 escaped the notice of so many carcinologists, including 

 even so careful and accurate an observer as Prof. Gr. O. 

 Bars, Canon A. M. Norman informs me that such males 



