20G COPEPODA. 



CALIGUS CENTRODONTI, Baird. 



1S50. Cal>f/>ts centrodontt, Baird, p. 27:?, pi. xxxii. figs. 6, 7. 

 1905. Caliyus centrodunti, Wilson, p. 052, pi. xxvii. tigs. 3.33-344. 



On the Sea-Bream, Pagellus centrodontus, at Polperro 

 (.1. M. .V.). 



CALIGUS RAPAX, H. Milne-Edwards. 



1850. Calif/us rapa.r, Baird, p. 270, pi. xxxii. figs. 2, 3. 



1861. Caligus rapa.r, Steenstrup & Liitken, p. 359, pi. ii. fig. 4. 



1900. Califfus rapa.r, T. Scott, p. 148, pi. v. fio-s. 13-19. 

 1905. Caligus rapax, Wilson, p. 568, pi. vii. figs. 79-89. 



Starcross, Plymouth, and Falmouth (A. M. N.}. 



CALIGUS PELAMYDIS, Kroyer. 



1863. CaUgus pelamydis, Kroyer, p. 50, pi. iv. fig. 4, a-g. 

 1896. Culiyvs scomberi, Bassett-Smith, p. 11, pi. iii. fig. 2. 



1901. Caligus scombri, T. Scott, p. 124, pi. vii, figs. 9, 10. 



1905. Caligus pelamydis, Wilson, p. 594, pi. xiii. figs. 154-161 ; 

 pi. xiv. fig. 161 a. 



On the inner surfa.cn of the operculum of the Mackerel, 

 Scomber scombrus, at Plymouth (Bassett-SmiiK). 



CALIGUS GURNARDI, Kroyer. 



1863. Calif/us gnrnardi, Kroyer, "Bidrag til Kundskab om Snylter- 

 krebsene," Naturhist. Tidssk. ser. 3, vol. ii. p. 150, pi. ii. fig. 3, a-y. 

 1895. Califfus ffurnardi, Bassett-Smith, p. 157. 



In the gill-cavity of Trtqla cuctdus at Plymouth (Bassett- 

 Smith] ; Falmouth, 1884 (A. M. N.}. 



CALIGUS DIAPHANUS, Nordmann. 



1832. Calif/us diaphanus, Nordmann, Mikrograph. Beitrage, pt. ii. 



p. 26. 

 1863. Caliyus diaphanus, Kroyer, Naturhist. Tidssk. ser. 3, vol. ii. 



p. 153, pi. vii. fig. 5, a-e. 

 1900. Caliyus diaphanus, T. Scott, p. 149, pi. v. figs. 20-25. 



This is not Caligus diaphanus, Baird = C. curtus, Miiller, ^ . 



Found in quantity on the inner surface of the operculum 

 of Trigla Inrundo and Trie/la cuculus at Plymouth (JBassett- 

 /Smit/i) . 



CALIGUS ZEI, n. S P . (PI. XXII. figs. 1-8.) 



The cephalosome has the length and breadth snbeqnal, the 

 sides only slightly arched ; the cephalic area somewhat larger 

 than the metosomatic, the lateral areas bend inwards 

 posteriorly ; the frontal plates with their lunules are of 



