Rev. A. M. Norman's Notes on British Ainpliipoda. 125 



such a situation that it can be seen (as in Barrois's figured 

 specimen) when the hand is viewed from the outside, and 

 Costa's figure might very fairly represent the external aspect 

 of the hand of such an example as that figured here as fig. 4, 

 provided the tubercle (c) was not quite so prominent. The 

 tubercle [h) is present in all three specimens and is tipped 

 with short blunt spines ; but the tubercle (c) is not developed 

 in fig. 3; is small in the next size (fig. 4), but is largely 

 developed in the most mature form (fig. 5). 



A comparison of these figures with each other and witli 

 those given by other authors will show that there must be 

 considerable latitude allowed for variation in the exact arma- 

 ture of this limb ; the finger increases in comparative length 

 with age and is more strongly bent in the younger specimens 

 than in the mature. 



The hand of the second gnathopods (PI. XT. fig. 2) in tlie 

 female is more regularly ovate, tlie finger closes on the inner 

 face, but there is no groove, the finger impinging against a 

 few spines on the surface. 



The species is readily known from other British Amphi- 

 pods by the characters of the telson (fig. 8), the remarkable 

 last uropods (fig. 7), and the broadly expanded joints of the 

 hinder pera^opods (fig. G). 



Stebbing has described two more species of this genus in 

 the 'Challenger' Report. The E. subcarinatus, Haswell, 

 may at once be distinguished by the veiy different telson, and 

 E. clelaplata, Stebbing, by the difference in the last uropods. 

 The general form of the second gnathopod is remarkably alike 

 in the three species. 



The illustrations of this species are to many scales of 

 enlargement. The perteopod (fig. 6) is the least magnified ; 

 the illustrations of second gnathopods ( ^ ) (figs, 3, 4, 5) are 

 more magnified ; those of the gnathopods of female and of 

 last uropods (figs. 1, 2, 7) are more magnified than the last, 

 and the telson (tig. 8) is the most eidarged of all. 



Genus V. M^EA, Leach, 1814. 

 { = Meffam(P7'a, Bate, Ceradoctis, Costa, and Leptothoe, Stimpsoii.) 



1. Mcera othonis (H. Milne- Edwards). 



1830. Gammarus othonis, II. Milne-Edwards, Ann. des Sc. Nat. vol. xx. 



p. .373, pi. X. fig. 11,$. 

 1847. Gammarus longimanus (Leach, MS.), "\\ m. Thompson, Ann. ifc 



Mag. Nat, Hist. ser. 1, vol. xx. p. 242, d". 

 1847. Gammarus elom/afus, Frey and Leuckart, Beitr. zur Kennt. 



wirtell. Thieve, p. 1(30. 



