CLAVELLA UNCIXATA. 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. 

 Maxillae 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- 

 peds 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 cephalothoracic 

 appendages small and somewhat rudimentary. Length 

 about 1 mm. 



Habitat. Found parasitic on the whiting (Gadua 

 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 uncincita 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. 



