PORCELLIDIUM. | 167 
2. PoRCELLIDIUM FIMBRIATUM, Claus. Pl. LXX, figs. 1—4. 
Porcellidiwm fimbriatum, Claus. Die frei-lebenden Copepoden, p. 
140, t. xxii, fig. 1 (1863). 
Body scarcely at all attenuated behind, broadly 
oval, width equal to two thirds of the length; integu- 
ment pitted, as in the preceding species. Mouth- 
organs and swimming-feet scarcely different from 
those of the previous species. Fifth pair of feet (fig. 
1 a) forming two broadly triangular plates, with finely 
ciliated margins, between which the caudal segments 
are intercalated; last thoracic segments (fig. 1 5) 
produced backwards into long triangular lamine, 
which reach as far as the apices of the fifth feet. 
Caudal segments (c) elongated, broad, laminar, with 
broad, finely ciliated extremities. Colour yellowish or 
pale olive, often tinted with red and violet. Length 
35th of an inch (1 mm.). 
P. fimbriatum, like the rest of the genus, occurs 
chiefly on the fronds of Laminarice and other seaweeds ; 
it is also sometimes taken by the dredge in consider- 
able numbers, in localities where decomposing Algee 
and other vegetable matters are deposited. Clifden, 
Birtirbuy and Ventry Bays (Ireland); Cumbrae and 
-Portincross (Firth of Clyde); St. Mary’s (Scilly) ; 
Alnmouth (Northumberland); Oban, Hillswick, and 
Lerwick (Rev. A. M. Norman). 
