STEBBING— ISOPODA 95 



of the inner branch. The terminal joint of the latter is also strongly plumose except 

 on the straight proximal part of its inner margin ; it widens a little from the base, and is 

 more than half as long as the peduncle. 



The oval telson is broadly rounded at the end, which carries centrally two pahs 

 of rather long setee beset with some short ones. 



Length about 5 mm. 



Locality. Egmont, breakers on reef edge. 



Specific name from feVos, strange, and x ei P> hand, in allusion to the unique character 

 of the hand and finger in the first gnathopods. 



Fam. Eurydicidse. 

 1905. Eurydicidse, Stebbing, in Herdman's Rep. Ceylon Pearl Fish., pt. 4, Rep. 23, 

 p. 10. 



Gen. EURYDICE, Leach. 

 1815. Eurydice, Leach, Trans. Linn. Soc. London, vol. xi., p. 370. 

 8. Eurydice truncata (Norman). 



1868. Cirolana truncata, Norman, Ann. Nat. Hist., ser. 4, vol. ii., p. 421, pi. 23, 

 figs. 12—15. 



1869. Cirolana truncata, Norman, Brit. Assoc. Report for 1868, pp. 255, 288. 

 1882. Eurydice truncata, Norman, Proc. R. Soc. Edinburgh, 1881-2, p. 683. 

 1890. Eurydice truncata, H. J. Hansen, Vid. Selsk. Skr., ser. 6, vol. v., pi. 3, 



pp. 366, 375. 



1895. Eurydice truncata, H. J. Hansen, Isopoden, Cum. u. Stomat. der Plankton 

 Exp., p. 13, pi. 1, fig. 5— 5h. 



1905. Eurydice truncata, Tattersall, Fisheries, Ireland, Sci. Invest., 1904, n. [1905], 

 p. 45, pi. 11, figs. 5—8. 



The broad telsonic segment has the lateral margins finely crenulate and the truncate 

 distal margin cut into twelve teeth, of which the outermost but one at each end is 

 conspicuously the largest. This character apparently distinguishes the species from all 

 others of the genus hitherto described. The segment is quite pellucid, except for a band 

 of colour at the base. Under high magnification it is seen to be covered with scale-like 

 markings. The truncate uropods are likewise pellucid, the outer plate much smaller than 

 the inner, this latter in our specimens being considerably larger than shown in the figure 

 of Norman's North-Atlantic specimen. The first antenna? have also a longer first joint to 

 the fiagellum than in his figure, but this feature is doubtless variable within the lifetime 

 of the individual*. The fiagellum of the second antennae may have as many as twenty- 

 seven joints, and is sometimes as long as the whole animal. The first gnathopods in the 

 Eastern specimens are in exact agreement with Norman's figure. In the second pleopods 

 the masculine appendage is attached a little above the middle of the inner plate's inner 

 margin, and extends beyond both plates. It is thickest at each extremity, but the 



* See on this subject Tattersall's observations, which corroborate my supposition and give farther 

 information. 



