430 teansactions liveepool biological society. 



Lbucothoid^. 



Leucothoe spinicarpa (Abildgaard) . 



B.E. coast of Isle of Man, in branchial sac of Ascidia 

 venosa and A. mentula; off Port Erin, washed out of 

 Pectens (I. C. T.) ; Towyn, Anglesea, 5 f. Length 12 mm. 

 Generally speaking only one or two individuals are found 

 in each Ascidian. 



Leucotlioe lilljehorgii, Boeck = ?L. imparicornis, Nor. 



Off Port Erin, ''Lady Loch," 24/3/94, "washed out of 

 dredged material from several hauls" (I .0. T.). Length 

 2J mm. Of the above two species the latter (indicated by 

 the up-turned hinder angle of the third pleon segment and 

 other characters) had the upper and lower antennae of the 

 same length, while in the former the upper were much 

 longer than the lower, showing how fallacious characters 

 derived from the relative length of these organs are. My 

 specimen was doubtless immature. 



^DICERID^. 



Monocnlodes carinatus, Bate. 



Port Erin, outside harbour, 21/8/92 (I. C. T.) [Galley 

 Head, 24/10/94] 7. m. W. of Bradda Head, 31 f., 25/4/95. 

 Length 3 mm. 



Perioculodes longimanns (Bate). 



Port Erin Harbour ; Colwyn Bay ; Menai Straits. 

 Shore to 39 fathoms, sandy ground. Eyes generally red 

 but sometimes dark. An abundant species where it occurs. 

 Length 4 mm. 



Pontocrates arenarms (Bate) = P. norvegicus in Rep. II. 



Ehos and Colwyn Bays ; Menai Straits ; Port Erin 

 Harbour, common; Garwick Head; in stomach oiAgonus, 

 Morecambe Bay; a female 6 mm. long, 1 m. S.E. of 

 Kitterland 20 f., average length of females with ova from 

 Port Erin Harbour 3 to 4 mm. Colour white. 



