3GG THE PLANKTON OF THE FARoE CHANNEL AND SHETLANDS, 



35° N. to 125° W. My species differs a little from Giesbreclit's, and may 

 be, from the locality of its occurrence, designated horcalc. Only a brief 

 description of Gaidius pungens is available {he. cit.), the only described 

 species.* 



EUCHIRELLA CARINATA <? nOV. sp. 



A male taken at A2, 300 fathoms, measured 3'71 mm. long, the fore- 

 body six times as long as the abdomen. The last thoracic segments are 

 rounded. The head is produced into a curious rostrum rather like 

 E. fjaJatca ? , and dorsally there is a strong crest. There is red pigment 

 about the mouth organs and the mandible chewing end is strongly 

 coloured deep orange-red, the foot jaws having their bristles similarly 

 but slightly coloured. The anterior antennre reach just to the hind end 

 of the thorax and consist of twenty-three joints. The feet have three- 

 jointed exopodites except the second, in which they consist of only two 

 joints, the endopodites of the first feet have one, those of the second 

 feet two, and of the third and fourth feet three segments. There 

 is a pair of rudimentary fifth feet, consisting each of an exopodite 

 and endopodite. The right foot is a little the largest, its external 

 branch of only one segment, in which are indistinct traces of three 

 joints ; the terminal joint ending in a blunt rounded process. The 

 internal branch is of one stumpy rounded segment only. The left foot 

 has a one-segmented outer branch, with blunt rounded end, and a 

 short (not half the size of the opposite foot) rounded segment, like 

 a small stump. Neither foot has any trace of spines or hairs. 



The anal segment is very short and tucked into the fourth abdominal 

 segment as in other Euchirellas. 



The external branch of the posterior antenna is over three times as 

 long as the inner branch, which carries 6 + 5 bristles at the end. 



There are no spines or bristles on the first basal of the fourth foot. 



The twentieth and twenty-first joints of the anterior antennae are not 

 coalesced, but the antennae strongly resemble those of Euchirella. 8 and 

 9 and 24 and 25 are joined. 



This Copepod agrees with Euchirella in the possession of twenty-three 

 jointed anterior antennas, the shape and number of segments of the 

 abdomen, the segments of the branches of the feet, and the posterior 

 antennae. The maxillas and foot jaws are well developed, the former 

 very similar to the maxilla of the ? E. messinensis, the second basal 

 joint of the posterior foot jaw is not quite twice as long as the well- 



* The nearest related genus is Gaetanus (Giesbreclit), but this Copepod is removed from 

 it by the absence of any median spine on tlie head. The indistinct traces of segmentation 

 of the first and second feet cause it to approach the genus Gaetanus, wliile the lamellae of 

 the fourth feet (Ijasal joint) again differentiate it. On the whole, it approaches more 

 nearly to Gaidius than Gaetanus. 



