COPEPODA OF LIVERPOOL BAY. 143 
9. Lichomolgus hirsutipes, T. Scott, 11th Ann. Rept. 
S.F.B., part 3, p. 206. Length 1°4 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. Rept. 
S.F.B., part 3, p. 260. Length 1°1 mm. 
This species, which is readily recognised by the structure 
of the.fifth pair, occurred sparingly in gatherings made on 
the mud dats 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, Pl. IL., 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. 1., fig. 4. 
A parasitic Copepod on the Hake. April 19th, 1897. 
This species and Caligus diaphanus have already been 
referred to in the 1ith Ann. Rept. of the Marine Biologi- 
cal Station, Port Erin, p. 11. 
14. Chondracanthus radiatus, (see Bidrag Kundskab om 
Snyltekrebsene of Kroyer). 
Found on the fins of a Codfish. Dec. 6th, 1897. 
Nicothe astact, Aud. & M. Edw., Ann. Sc. Nat., Ser. I., 
welt Plo XE TX. 
This peculiar parasitic Copepod, which has all its 
appendages fully developed, is found occasionally in con- 
siderable numbers on the branchie 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, 
