370 THE PLANKTON OB" THE FAROE CHANNEL AND SHETLANDS. 



caudatus, Giesb., but is considerably larger. The genital segment is 

 longer than both succeeding segments; the anal segment is half as 

 long again as the middle segment of the abdomen. The bristles of the 

 mandible and anterior foot jaws, and the proportions of the joints of 

 the posterior foot jaws, also differ. The fifth foot differs in relative 

 proportions, and the spine on the second joint of the exopodite is quite 

 peculiar. It differs from Aug. megalurus, especially in the large spine 

 of the fifth foot and the size of the middle segment of the abdomen. 



Two specimens were found in Dr. Fowler's collection, one from a 

 bottle marked 19 d.e. Epiplankton, and one from Mesoplankton 20 

 (stations referred to in his paper in the Proc. Zool. Soc, loc. cit.). 



Pseqdocyclopia Giesbrechtii, nov. sj). Plate IV. 



Length of the whole animal, '72 mm. (cephalothorax, "oTS mm.). 

 Body robust, with a short pointed rostrum, and of four segments. 

 Abdomen slender, of four segments, the first equal in length to the 

 third and fourth. Furcal segment about as long as broad — of the four 

 tail setre. the two middle of each side are stout, not jointed, and cross- 

 ringed in their whole length, and feathered throughout; the four 

 shorter hairs are cross-ringed only to the joint. The anterior antcnnm 

 do not reach to the end of the cephalothorax, and contain seventeen 

 joints, the first joint about equal in length to tlie succeeding thirteen 

 joints. The jyosUrior antennce have only one branch (internal) composed 

 of four joints. The mandibles are large, with broad chewing end and 

 two-branched palp. The maxillce and anterior foot jaws present nothing 

 unusual, except that the exopodite of the former is suppressed. The 

 jyosterior foot jaivs consist of two basal joints and a five-jointed 

 eudopodite. The two basal joints are about equal in length. The 

 endopodite is shorter than the second basal joint. 



The Swimming Feet. — The first pair is short, and has three jointed 

 exopodites and one jointed endopodites ; tlie second pair has three 

 jointed exopodites and two jointed endopodites ; the third pair has 

 three jointed outer and inner branches. The internal branch of the 

 right foot is longer than that of the left side, the second segment being 

 longer than that of the other internal branch. The distal joint of the 

 outer branch of the left foot is much longer and broader than that of 

 the foot of the other side, has two stout spines on the outer margin, 

 and a long apical spine twice the length of that of the opposite foot, 

 the terminal joint in which carries only one outer marginal spine and a 

 very short apical spine. The long, stout, naked spine arising from the 

 inner distal margin of the first basal joint is in each foot as long as the 

 internal branch. This foot is very remarkable, and may be an ab- 



