156 BBITISH COPEPODA. 



2. ZAUS GOODSIBI, Brady. PL LXVI, fig. 1013. 



Zaus ovalis, Glaus. Die frei-lebenden Copepoden, p. 146, tab. xxii, 

 fig. 18, and tab. xxiii, figs. 1118 (1863). 



Body elongated, depressed, sub-pyriform, first seg- 

 ment about one third the length of the animal ; 

 rostrum large, much broader than long, slightly 

 rounded in front ; abdomen narrower than the cephalo- 

 thorax. Anterior antennae slender and tapering, 

 9-jointed; first, second, and third joints longest and 

 sub-equal, fourth and sixth much shorter and nearly 

 equal, the rest minute ; the male anterior antenna (fig. 

 11) is stouter, less tapered, and more profusely setose at 

 the apex, the fifth and sixth joints small and con- 

 stricted, the seventh somewhat swollen, but not 

 vesiculated. Posterior antennae and mouth-organs not 

 materially different from those of Z. spinatus. Swim- 

 ming feet also like those of Z. spinatus, except that 

 the terminal claws of the inner branch of the first pair 

 are much more slender and longer (fig. 12). Outer 

 segment of the fifth pair of feet in the female (fig. 13) 

 elongated, subovate, margins hispid, apex bearing five 

 plumose setae ; inner segment almost obsolete, bearing 

 four setae, one of which is long and plumose ; in the 

 male, the inner portion is entirely wanting. The 

 abdomen gradually tapers backwards, and the posterior 

 angles of its first two segments, as well as all those of 

 the cephalothorax, are much produced and acutely 



