102 



(lefiiiPil from the anterior lip, botli together forming a rounded prominence in 

 front of the buccal area. Posterior lip membranous, with the lobes slightly 

 emarginated at tlie tip. jVlandilile.s rather strong, the molar expan.sion nar- 

 rowly truncated at tlie tip, palp very large and originating a little nearer 

 tlie tip than does the latter. First pair of maxillae with the masticatory 

 lobe large and obliquely truncated; basal lobe small, bisetose; palp compara- 

 tively short. Second pair of maxillae with the inner lobe only half the length of 

 the outer. Maxillipeds well developed, masticatory lolie oblong oval and not 

 reaching to the end of the antepenultimate joint of the palp, the latter large and 

 robust witli the joints rather expanded, terminal joint claw-like. Anterior gnatho- 

 poda unusually strong, propodos considerably expanded and having a dis- 

 tinctly detined palmar edge. Posterior gnatliopoda slender, with the propo- 

 dos slightl}' ])roduced at the tip beneath the small dactylus. Pereiopoda 

 .slender and elongate, basal joint of the 3 posterior pairs moderately expanded. 

 Last pair of xiropoda reaching considerably beyond the preceding pair, outer 

 ramus setous on the inner edge. Telson short and broad, squanaiform, entire. 

 RemarliS. — It may perhaps be somewhat doubtful wliether the form 

 Lysianassa chatisica, upon A\liicli Milne-Edwards founded his genus Alihrotus, 

 is in fact congeneric with the nortliern species described in the seijuel. But 

 as Sp. Bate believes this to be the case, I have thoiight it right to adopt the 

 generic name proposed by Milne-Edwards. In my opinion J.MOJ?ya; littoralis of 

 Kroyer cannot, as suggested by Boeck, be referred to the same genus as 

 Aiionyx Edn-ardsii and pJaiihts of tlie said author, and thus tlie genus Onesi- 

 miis of Boeck may properly Ije restricted to tlie two last named Kroyerian 

 species. From that genus the present is chiefly distinguiidied by the much 

 more elongated and slender antennae, by the unusually powerful structure of 

 the antei'ior gnatliopoda and by the fuller develojiment of the last pair of 

 uropoda. 



4;"). Alibrotus littoralis, Ovroyer). 



m. 35, fig. 2.) 

 Anonyx Itttoralis, Kvoyer, Nat. Tid8.skr. 2den Eiekke, Bd. 1, p. 621. 



Body glabrous, curved and rather compressed. Cephalon about the length 

 of the 1st segment of mesosome, lateral corners only slightly j'rojecting and 

 narrowl.y rounded at the tip. First pair of coxa! plates rather large and mucli 

 ox]iaii(Ic(l distally, antei'ior and inferior edges fdrming together an even curve; 

 the 2 succeeding ones much nai'rower and scarcely twice as deep as tlie 

 corresponding segments; 4tli ]iair likewise unusually narrow and but very 

 sligtlitly expanded in their Inwi'i- jiart; 5th pair I'ounded f|nadrangular, more 



