206 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



of the male abdomen; " it is, however, very well defined in 

 one of the specimens taken ofi" Puffin Island (see PI. IV, 

 fig 2). 



Family III. — CYCLOPiDiE, 



Oithona spinifrons, Boeck. 

 One female specimen of this species was found amongst 

 Prof. Herdman's Port Erin material. It is a very minute 

 species, and therefore difficult to dissect. Dr. Brady, who 

 has examined the specimen, regards it as an Oithona, hut 

 considers it doubtful whether or not it really belongs to this, 

 the only hitherto known British species. The specimen 

 seems to me, however, to agree with the essential characters 

 of 0. spinifrons in all respects. 



Family IV. — Notodelphyid^.. 



Ascidicola rosea, Thorell. 



Notodelphys ascidicola, Allman, Ann. and Mag. Nat. Hist., 

 vol. XX, pi. i, figs. 1-13 (1847). 



One specimen of this parasitic species was found in the 

 branchial sac of a Simple Ascidian dredged off the South 

 end of the Isle of Man. 



Family VI.— Harpacticid^. 



CanthocamptKs stromii (?), Baird. 

 Byerley records this species as having been found by 

 Mr. Weightman at New Brighton, in tide pools, 1853. 



Canthocainptus furcatus. 

 Recorded by Mr. Byerley as found at Hilbre, and in 

 pools amongst seaweed around the coast. 



Harpacticus chelifer, Miiller (PL IV, fig. 3). 



Cyclops chelifer. 0. F. Miiller, Zool. Dan. Prodr., 2413 ; Ento- 

 mostraca, p. 114, taf. xix, figs. 1-3, 1776. 



Recorded by Mr. Byerley as being "not uncommon upon 



