CALIGUS. 
271 
of feet long and slender ; the last joint terminating in a 
long curved claw, serrated on its inner edge, and two or 
three short spines at its base. Oviferous tubes nearly 
the length of the body. 
Male. In the male, the last joint of the thorax is 
considerably smaller, and more of an ovoid shape, than 
in the female ; while the abdomen is longer, narrower, 
and divided into two articulations, the first being the 
shorter. The terminating setae are long, and densely 
plumose. 
Third pair of foot-jaws large. In other respects much 
the same as female, but rather smaller. 
This species strongly resembles the C. minimus of 
Otto ; but there is no notch on frontal plates ; the sides 
of the carapace are not hairy, and the antennae are diffe- 
rent, being much larger. 
Hab. — Belfast Bay, W. Thompson, Esq. Taken from 
the gurnard ( Trigla hirundo et pini ), November 1839 ; the 
Zeus faber , in February; Trigla gurnardus , June; Platessa 
limanda, December ; Lough Neagh trout, March ; Corre- 
gonus pollan. Lough Neagh, November and December ; 
the brett, Rhombus vulgaris , March, November, and De- 
cember ; Merlangus vulgaris , March and December. 
2. Caligus Mulleri. Tab. XXXII, figs. 4, 5. 
Caligus Mulleri, Leach, Enc. Brit. Supp., i, t. 20, f. 1-8. 
— Besmarest, Cons. gen. Crust., t. 50, f. 4 a-e. 
Description. — Female, Carapace oval, rather longer 
than broad, narrower at upper extremity. Frontal plates 
of considerable size, notched in the centre. Lunules well 
developed. Antennae of considerable size; basal joint 
large. Thorax shorter than the carapace, about half the 
size; penultimate joint very small, of an elongate 
diamond shape ; last joint nearly quadrilateral, and lobed 
at posterior extremity. On each lobe there are two verv 
small tubercles, each of which gives off two short setae. 
