CLAVELLA UNCINATA. 215 



being fully twice as long as broad. Abdomen small 

 but quite distinct. 



Antennules three-jointed, the proximal joint large 

 but tapering towards the distal end; other joints small 

 and subequal but the end one rather the larger. Man- 

 dibles small, biting part serrated on the inner edge. 

 Maxilla3 small, expanded towards the distal end, with 

 the outer margin somewhat gibbous ; each bearing a 

 couple of terminal spines and also a small subterminal 

 lobe with two spinules at its apex. The first maxilli- 

 peds rather diminutive in size but provided with 

 moderately stout terminal claws. The second maxilli- 

 p'eds completely coalescent, very short, expanded at 

 the apex, and fixed to a nipple-like plug which pene- 

 trates the tissues of the fish. Egg-strings tolerably 

 slender and fully twice as long as the genital segment. 

 Length of the specimen represented by figure 2, 

 PI. LXV, exclusive of the cephalothorax, about 

 6*5 mm., but the size is somewhat variable. 



Male. — The male is very small, and, viewed laterally, 

 the height is equal to about one and a half times the 

 length ; the dorsum tapers upwards and assumes a 

 somewhat conical outline, but with the apex boldly 

 rounded. Both pairs of maxillipeds short but tolerably 

 stout and strongly uncinate ; other cephalothoracie 

 appendages small and somewhat rudimentary. Length 

 about 1 mm. 



Hahitat. — Found parasitic on the whiting (Gaclus 

 merlangus) and other Gadoids. This tolerably common 

 species has been recorded from various places round 

 the British coasts. Larne and Dublin ( W. Thompson) . 

 Polperro and Falmouth (A. M. Norman). Plymouth 

 (Bassett-Smith). Irish Sea (A. Scott), and also from 

 various Scottish localities. 



A young Clavella uncinaua with two males adhering to it 

 is represented by fig. 6 on PI. LXV. In this specimen 

 the genital segment is much less robust, and the mouth- 

 appendages are more rudimentary. 



