HARPACTIOUS. 149 
localities, and appears to be convinced of the specific 
distinctness of his H. gracilis. 
It is scarcely needful to note the numerous localities 
from which I have memoranda of the occurrence of 
this species. J have found it in many places on the 
coasts of Durham and Northumberland, as well as in 
Galway, Mayo, the Scilly Islands, and the Firth of 
Clyde. Mr. Norman also notes its occurrence at 
Tobermory in the Island of Mull. 
2. Harpacticus rutvus, fischer. Pl. LXIV, figs. 1—11. 
Harpacticus fulvus, Fischer. Beitrag. zur Kenntniss der Entom. 
(Abhandl. der Konig. Bayer. Akad., 
Bd. viii, p. 656, t. i, figs. 30—33; t. u, 
figs. 34—39 (1860). 
— chelifer, Lilljjeborg. De Crustaceis ex ord. trib., p. 200, 
tab. xxii, figs. 2—11 (1853). 
— crassicornis, Brady and Robertson. Brit. Assoc. 
Report, p. 196 (1875). 
— curticornis, Boeck. Oversigt Norges Copepoder, 
p. 38 (1864). 
Tigriopus Lilljeborgii, Norman. Last Shetland Dredging Report, 
p. 296 (1868). 
Rostrum short and blunt. Anterior antenne (fig. 1) 
robust, second and third joints longer than the fourth, 
and nearly equal, seventh and eighth joints very short, 
about half as long as the sixth and ninth, which are 
nearly equal. Inner branch of the posterior antenna 
rather large, 3-jointed (fig. 3). Lateral segments of 
the maxilla (fig. 4) slender. Posterior foot-jaw (fig. 5) 
forming a broadly ovate or sub-pyriform chelate hand, 
without an angular promontory, but bearing a strong 
bristle on the inner margin which is strongly convex, 
