AMPHIPODA— STE15BING. 613 



outer ramus is a little shorter and less than half the breadth, 

 distally armed with seta-like spines, successively longer, and a 

 stout spine with a smaller companion on each side. The inner 

 ramus is a rudiment not half the breadth and only a quarter the 

 length of the outer, with a little spine on its truncate end. 



The telson is small, broader than long, with the distal border 

 slightly angled between two sets, consisting each of aspinule and 

 setule which pi'oject from the dorsal surface. Length of the 

 animal, not including antennae, about 3 mm. 



The specific name speaks for itself. 



Locality. — Off Manning River, one specimen ; from Jarvis 

 Bay, specimens of both sexes numerous, but all with the appear- 

 ance of having at some time been partially di'ied. 



Genus EURYSTHEUS, Bate. 



Eurystheus, Bate, Ann. Mag. Nat. Hist., (2), xix., 1857, p, 143. 

 Gam7naropsis, Walker, Ann. Mag. Nat. Hist., (7), xviii,, 1906, 



p. 153. 

 Eurystheus, Stebbing, Das Tierreich, xxi., 1906, pp. 610, 637, 638. 

 Eurystheus, Stebbing, Ann. S. African Mus., vi., 1, Crust., 4, 



1908, p. 84. 

 Eurystheus, Holmes, Proc. U.S. Nat. Mus., xxxv., 1908, p. 541. 

 Eurystheus, Walker, Trans. Linn. Soc, xii., 4, 1909, p. 339. 



It may here be explained that the reason for rejecting Lilje- 

 bor"'s Gammaropsis in favour of Bate's later name Eurystheus 

 depends on the circumstance that Liljeborg included in his genus 

 a species identical with the single form for which Kroyer's 

 Protomedeia was established. Thus Gammaropsis became at once 

 a synonym of Protomedeia. From the thirteen species described in 

 " Das Tierreich " as belonging to Eurystheus, one, E. hirsutus, 

 has since been transferred to Cheiriphotis, Walker, as the female 

 of C. megacheles (Giles). Four species are mentioned without 

 description, namely, E. dentatus, Chevreux, 1900, E. tenuicornis, 

 S. J. Holmes, 1904, E. zeylanicus, A. O. Walker, 1904, E. 

 gardineri. Walker, 1905. To these must now be added E. longi- 

 cornis, Walker, 1906, E. holmesi, Stebbing, 1908, E. dentatus, 

 Holmes, 1908, and E. monuropus. Walker, 1909. But of these 

 species the last but one has, it will be perceived, a preoccupied 

 name. Like Chevreux's species it has certain segments of the 

 pleon dorsally dentate. In other respects it differs considerably, 

 havino- the first gnathopods compact instead of slender, and the 

 third uropods short instead of comparatively long. It may be 

 distinguished as E. alaskensis, from its place of origin. 



M M 



