CATALOGUE OF BRITISH CRUSTACEA. 119 



1. CALIGUS. 



Caligus, Mailer, Entom. p. 128 (1785). 



Monoeulus, sp. Linn. 



Binoculus, sp. O. Fabr. 



Pediculus, Easier. 



Oniscus, Slabber. 



Risculus, pt. Leach, Diet. So. Nat. xiv. p. 536. 



1. CALIGUS DIAPHANUS. Transparent Fish-louse. 



Caligus diaphanus, Nordmann, Micr. Beitr. ii. p. 26 ; Kroi/er, 

 Nat. Tidsk. \. p. 623, t. 6, f. 5, . ; M. Edw. Crust, iii. p. 452 ; 

 Thomp. Ann. fy Mag. Nat. Hist. xx. p. 247 ; Baird, Brit. Ent. p. 

 269, t, 32, f. 1 ; Easier, Op. Subs. p. 2, t. 8, f. 9 B ? 



a c. Old collection. (" Caligus piscinus"). 



d g. Ireland (on various flsli). Presented by W. Thompson, Esq. 



2. CALIGUS RAPAX. Rapacious Fish-louse. 



Caligus rapax, M. Edw. Crust, iii. p. 453, t. 38, f. 9; Baird, Brit. 

 Ent. p. 270, t. 32, f. 2, 3. 



a e. Ireland (on various fish). Presented by W. Thompson, Esq. 



3. CALIGUS MUELLERI. Cod Fish-louse. 



Caligus Miilleri, Leach, Enc. Brit. Suppl. i. p. 405, t. 20, f. 1 8 ; 



Sam. Ent. U. Comp. p. 79 ; Diet. Sc. Nat. xiv. p. 536 ; Desrn. 



Cons. p. 342, t. 50, f. 4 ; Johnston, Edin. New Phil. Journ. x. p. 



292, t. 7, f. 12, ?. 13, $. (1824); M. Edw. Crust, iii. p. 450; 



Baird, Brit. Ent. p. 271, t. 32, f. 4, 5. 

 Risculus molvfe, Leach, Diet. Sc. Nat. xiv. p. 536, $ ? 



a,b. Fifeshire (on the Cod). Presented by Dr. Spalding. 



c /. Ireland (on various fish). Presented by W. Thompson, Esq. 



4. CALIGUS CENTRODONTI. 



Caligus Centrodonti, Baird, Brit. Ent. p. 272, t. 32, f. 6, 7. 

 Ireland (on Pagellus centrodonti). 



