OOPEPODA. 39 



these outer teeth are not in either mandible thickened. The third feet resemble the 

 fourth. The right fifth foot has a long upright process on B 2, haired marginally ; the 

 Be 2 broad and with a marginal protuberance on which are two or three short teeth 

 and a small bunch of hairs, flattened long spine distal to it. Be S a. long curved spoon- 

 shaped segment, with a stout-based apical spine, shorter spine on the inner aspect ; 

 the right Bi with the second segment elongated and narrow, the third segment 

 comparatively broad and short, the inner marginal bristle of Bi 2 thickened. 



The left foot has a haired marginal projection as £ 2, BeS with a long stout 

 apical spine, three-quarters as long as the segment, and with a short marginal spine on 

 the inner side, Bi 2 broad, with thickened bristle. A specimen of II. longicornis from 

 the Faroe Channel measured 3 ' 5 mm. long ; Esterly records it from Diego, California, 

 3 mm. long. The Southern Ocean species evidently reaches a much greater length 

 (4 '5 mm.). 



FAEOELLA (Wolfenden). 



In the course of my cruising in the Faroe Channel in 1901 I captured a 

 copepod which differed from any known species, to which I originally gave the name 

 Pseud ostideus multiserrata, in the paper read at the British Association, 1902. In 1903 

 appeared Sars' supplement, in which he described a new genus, ^tidiopsis, which 

 appeared to be the same animal ; and as I had already recognised that this copepod was 

 distinctive from others closely allied (Pseudceddeus, Chiridius, Gaidius), I had created 

 for it a new genus, Faroella. My paper had been in the printers' hands for some time when 

 Professor Sars' supplement appeared with the description of JEtidiopsis. Consequently 

 I do not know to which name priority should be given, nor do I feel yet certain that 

 the genus described briefly by Sars is identical with the Faroella described by me in the 

 J. M. B. Ass. of 1904. Certainly the Faroella of the Antarctic Sea has some diff"erences, 

 and I therefore retain the name for the genus which I originally gave, more especially 

 as Professor Sars, who has examined some Irish specimens, states, as I am informed, 

 that they are not identical with his. 



Faroella Antarctica. 

 (Plate II., figs. 1, 2, 3, 4.) 



$ size 4-3 mm. (cephalothorax 3*3 mm,, abdomen I'O mm.). The fore-body is 

 therefore over three times as long as the abdomen. The head and first thoracic segment 

 are united, the two last segments of the thorax separate, the anterior segment over twice 

 as long as the four last segments ; the most posterior of these is well defined from the 

 one in front, small, and laterally prolonged into stout spines which are alDout three- 

 quarters as long as the genital segment. In dorsal aspect the head is rather triangular- 

 shaped, and on each side below the level of the posterior antennae, laterally expanded. 

 In the lateral aspect the head is evenly rounded, oval, and with stout two-pointed 



