COPEPODA OF LIVERPOOL BAY. 335 



9. Lichomolgus hirsutipes, T. Scott, 11th Ann. Kept. 



S.F.B., part 3, p. 206. Length P4 mm. 

 This well-marked species was obtained from collections 

 made in the Zostera beds near Piel. July, 1899. 



10. Hersiliodes littoralis (T. Scott), 10th Ann. Kept. 



S.F.B., part 3, p. 260. Length l'l mm. 

 This species, which is readily recognised by the structure 

 of the fifth pair, occurred sparingly in gatherings made on 

 the mud flats near Piel. June and August, 1899. 



11. Caligus diaphanus, Nordmann, Microgr. Beitr., 11, 26. 

 A parasitic Copepod on the Cod. April 19th, 1897. 



12. Caligus gurnardi, Kr., Bidrag til Kundskab om Snyltek- 



rebsene, p. 150, PI. II., fig. 3, a — g. 

 One specimen was taken in the dredge, at 26 faths., off 

 Port Erin Bay. Nov. 4th, 1898. 



13. Trebius caudatus, Kr., Tidsskrift., II. ; 30, t. I., fig. 4. 

 A parasitic Copepod on the Hake. April 19th, 1897. 



This species and Caligus diaphanus have already been 

 referred to in the 11th Ann. Kept, of the Marine Biologi- 

 cal Station, Port Erin, p. 11. 



14. Cliondr acanthus radiatus, (see Bidrag Kundskab om 

 Snyltekrebsene of Kroyer). 



Found on the fins of a Codfish. Dec. 6th, 1897. 



NicothcB astaci, Aud. & M. Edw., Ann. Sc. Nat., Ser. I., 

 vol. IX., PL XLIX. 

 This peculiar parasitic Copepod, which has all its 

 appendages fully developed, is found occasionally in con- 

 siderable numbers on the branchiae of the common lobster, 

 caught on our coasts. We have noted its occurrence on 

 lobsters from Holyhead, Port Erin, and Piel. The wing- 

 like projections of the fourth thoracic segment give it an 

 unusual appearance. 



