84- GAMMARIM. 



have the coxae deeper than the respective segments to 

 which they are attached. The coxae of the fourth pair 

 have an emargination that extends more than half its 

 depth, for the reception of the anterior margin of the 

 coxas of the fifth pair of legs. The remaining joints 

 of the first two pairs are uniform. The three posterior 

 pairs are also conjointly uniform ; their coxae are shorter 

 than their respective segments of the body ; the second 

 joints have the squamous plates broader above than 

 below, and are postero-inferiorly produced, so as almost 

 to reach to the distal extremity of the third joint ; the 

 fourth joint is somewhat dilated, the wrists are short, 

 the feet longer than the wrists, the fingers are short and 

 pointed. The caudal appendages are subequal, the pos- 

 terior pair being rather the shortest. The middle tail- 

 piece is as long as the branches of the posterior pair of 

 the caudal appendages. It is squamous and simple. 



We dredged the first specimen of this species in 

 Plymouth Sound, and described it under the name of 

 L. marina. We have also received it from one of our 

 most valued correspondents, Mr. Edward, of Banff, who 

 took it in the neighbourhood in which he resides; and 

 Mr. W. Thompson has found it in Strangford Loch, 

 Ireland. 



Since the publication of the " Synopsis of the British 

 Amphipoda," we have had the opportunity of examining 

 the type of M. Milne-Edwards' species, L. Atlantica, 

 preserved in the Museum of the Jardin des Plantes, and 

 are thereby enabled to identify the British species with 

 that taken in the Atlantic Ocean. 



This species, like L. Costa, appears to be represented, 

 by close resemblance of form, by species existing in dis- 

 tant localities, of which L. Kroyeri, from Van Dieman's 

 Land, is an example. 



