NEW SPECIES OF NOETHEEN AMPHIPODA. 191 



On two new Species of ^N'orthern Amphipoda. 



By the Rev. T. R. R. Stebbing, M.A., F.R.S., F.L.S. 



(Plates 27 & 28.) 



[Eead 21st November, 1907.] 



The species under consideration are derived from collections made by the 

 Goldseeker, in connexion with the International investigation of the North 

 Sea. For permission to lay the figures and descriptions before the Linnean 

 Society I am indebted to Prof. D'Arcy W. Thompson, C.B., F.L.S., who is 

 the representative for Scotland on the International Committee. In writing 

 to me on the subject, Prof. Thompson observes: "It is remarkable how 

 few new species turn up nowadays in our collections: we seem to be getting 

 very near to the bottom of our local fauna." In the present case the new 

 forms are of a rather striking character, so that, though they are small, it is 

 a little surprising that they should have escaped earlier notice. Not only 

 are they new, but, as will be seen, one of them makes an appeal that the 

 family to which it obviously belongs should submit to a small change in its 

 definition in order to receive the new comer. Similarly, the other asks for 

 hospitality in a genus which can only give it a welcome by slightly enlarging 

 its previous boundaries. 



Both species come from a considerable depth. Both are apparently quite 

 blind. Both are armed with ^numerous processes; and both, as preserved, 

 are colourless and to some extent pellucid, these characters making it not a 

 little difficult to disentangle the exact boundary lines of the various parts and 

 appendages. 



Family Paeamphit hoit)^. 



1906. Paramphithoid(S, Stebbing, Das Tierreich : Amphipoda Gammaridea, Lieferung 

 21, p. 820. 



As defined in the reference given above, the family contained the three 

 genera, Epimeria, Costa, the much-restricted Paramphitlioe, Bruzelius, 

 and Actinacanthus, Stebbing. To embrace the new genus here instituted 

 the definition requires to be modified only in one particular. Instead of 

 affirming absolutely that the integument is indurated and the side-plates 

 rigid, it should claim this solid firmness only as usually present. 



Lepechinella, nov. gen. 



Integument not indurated, dorsally processiferous. Head rostrate. 

 Accessory flagellum of first antennse rudimentary. Mandibles well deve- 

 loped; palp slender, with second joint much longer than first or third. 



LINN. JOUEN. ZOOLOGY, VOL. XXX, 16 



