532 



nearly twice as long- as it is broad at the base, cleft very narrow and 

 extending nearly to the base, terminal lobes bidentate at the tip, and each 

 provided with a slender apical spine. Body of a pale orange colour, with 

 the anterior part of the intestine shining through the integuments as a dark 

 shadow. Length of adult female 8 mm, of male nearly 10 mm. 



Remarks. This form was first described by Sp. Bate as Gammarus 

 pallidus, and subseqently regarded by him as the type of his genus Lilljeborgia. 

 The Gammarus brevicornis of Brnzelius, upon which Boeck founded his genus 

 Iduna, is undoubtedly the same species. It is easily distinguishable from 

 the other species by the comparatively large and very black eyes. 



Occurrence. The species occurs along the whole coast of Norway, 

 from the Christianiafjord to Vadso, in depths ranging from 40 to 300 fathoms. 

 In the Trondhjemsfjord I have found it in some places in great abundance. 



Distribution. - British Isles (Sp. Bate), Bohuslan (Bruzelius), coast of 

 France (Chevreux), 



27. Lilljeborgia Kinahani, (Sp. Bate). 



(PL 188, fig. 1). 

 Phaedra Kinahani, Sp. Bate, Cat. Araph. Brit. Mus. p. 119, PL XXI, fig. 1. 



Body very short and stout, with broadly rounded back, and the 2 

 anterior segments of metasome each armed dorsally, at the posterior edge, 

 with 3 juxtaposed denticles, of which the middle one is the largest; the first 2 

 segments of urosome each produced dorsally to a small denticle. Cephalon 

 rather short and deep, with the rostral projection distinct, lateral corners 

 considerably projecting, and obtusely acuminate at the tip. Anterior pairs of 

 coxal plates scarcely deeper than the corresponding segments, 1st pair broader 

 than the 2 succeeding ones, but scarcely expanded distally ; 4th pair rather narrow, 

 and angular in their outer part. Last pair of epimeral plates of metasome 

 produced at the lateral corners to a small, somewhat recurved point, defined above 

 by a slight sinus, posterior edge smooth. Eyes small, rounded, with black pigment. 

 Antennae rather short; the superior ones extending a little beyond the peduncle 

 of the inferior, peduncular joints about as in L.pallida, flagellum but little longer 

 than the peduncle, and composed of about 12 articulations, accessory appendage 

 exceeding half the length of the flagellum, and 7-articulate. Inferior antennae 

 with the last joint of the peduncle scarcely longer than the penultimate one. 

 Gnathopoda of a similar structure to that in the type species, the anterior 

 ones, however, having the basal joint abruptly dilated in its proximal part, and 



