31 



long as the two next following ; rostrum as long as 

 the first joint of the anterior antenna ; abdomen equal 

 in length to the cephalothorax, and composed of four 

 nearly equal joints. Anterior antenna (fig. 2) about 

 as long as the first segment of the body, 5- jointed, 

 joints nearly equal in length, except the fourth, which 

 is much shorter than the rest; posterior antenna 2- 

 jointed, the last joint bearing about eight apical seise. 

 First pair of feet short; second and third (fig. 5) 

 longer ; fourth (fig. 6) rather longer than the third ; 

 the external branches of the second and third pairs 

 bear long and slender marginal spines, but those of the 

 fourth are very weak and small. The fifth pair 

 (fig. 7) consists of one small subquadrate joint, which 

 is fringed distally with five or six rather long seta?. 

 The caudal segments are very small, about twice as 

 long as broad, but scarcely more than one fourth the 

 length of the last abdominal somite; the tail-setas 

 (fig. 8) are three, two very short and one of consider- 

 able length, the latter being sharply geniculated above 

 the middle, and equalling in length the last three abdo- 

 minal segments. Length -rgth of an inch (1'4 mm.). 



One specimen only of this remarkable Copepod has 

 come under my notice. It was dredged off Hartlepool, 

 in a depth of five fathoms, amongst muddy sand. 

 Without more knowledge of the mouth-apparatus, it 

 is impossible to assign to the species more than a 

 provisional place, but it seems to me not unlikely that 

 it may be found to be of parasitic or semi-parasitic 

 habits. It is very similar, in general character, to the 

 genus Ophthalmopachus, Hesse.] 



