588 " THETIS " SCIENTIFIC RESULTS. 



Genus LILJEBORGIA, Bate. 



Liljebcrgia, Bate, Cat. Amphip. Brit. Mus., 1862, p. 118. 

 Liljehorgia, Stebbing, Das Tierreicb, xxi., 1906, pp. 230, 726, 

 741. 



The very small species, L. proxima, added recently to this 

 genus by Chevreux from the Garabier Archipelago, is distinguished 

 from the European L. jmllida, Bate, and L. hrevicornis, Bruzelius, 

 especially by the very long finger of the fifth peraeopods. In this 

 character it agrees with L. 7nacronyx, from which it is separated 

 by the possession of large eyes and the deep apical notches in 

 the lobes of the telson. From both of these the Australian 

 L. aequahilis is distinguished not only by its greatly superior 

 size, but also by the absence of dorsal dentation, which occurs to 

 some extent in all the other known species of the genus, including 

 the obscure L. pugettendis, Dana, which has the fourth segment 

 of the pleon dorsally produced into a sharp tooth. 



LILJEBORGIA AEQUABILIS, Stebbing, 



Station 44. 



Liljeborgia aequabilis, Stebbiug, Chall. Rep., Zool., xxix., 1888, 



p. 988. 

 Liljeborgia aequabilis, Stebbing, Das Tierreich, xxi., 1906, p. 741. 



The description given in the " Challenger " Report holds good 

 for the " Thetis " specimens. The characters also are in so close 

 an agreement with those of L. brevicornis, Bruzelius, that the 

 student may be referred to the figures and description of 

 that species supplied by Professor G. O. Sar.s in his 

 Crustacea of Norway,® (under the name L. 2^(^llida, Bate). 

 Some distinguishing points may be briefly noticed. The 

 first and second side-plates of the peraeon have no projecting 

 tooth at the lower hind corner. The third pleon segment has a 

 little emargination just above the small posterolateral tooth. 

 The finger of the first gnathopod has nine serrations, not strong 

 but only discernible under high magnification. In the second 

 gnathopods the serrations are conspicuous, seventeen in number, 

 with the palm crenulate for a space near the hinge of the finger. 

 The hind margin of the second joint in the last three peraeopods is 

 very feebly serrate. The slender finger of the fifth pair is about 

 two-fifths as long as the sixth joint. The deeply divided tslsou 

 has two unequal spines, neither very long, in the rather shallow 



s Sars— Crust. Norway, i., 23, 1S94, p. 530, pi. clxxxvii. 



