110 



Inferior antennae, as c&mpared with those in the other known species, of incon- 

 siderable length, scarcely as long as the body, flagellum not attaining the length 

 of the peduncle. 1st pair of legs in female of the usual structure, in male con- 

 siderably stronger, with the carpus considerably expanded, and produced at the 

 end inside to an acute thumb-like projection, the inner edge of the joint densely 

 setiferous. Ambulatory legs in both sexes shorter and stouter than usual, last 

 pair scarcely exceeding in length the anterior division of the body. Uropoda 

 produced at the tip into several dentiform projections, one of which assumes a 

 hook-like appearance. Colour pale yellowish, slightly mottled with light brown. 

 Length of adult female about 3 mm. 



Remarks. — This form was first described by Goodsir from male specimens. 

 The female was subsequently recorded by Sp. Bate and Westwood as a new species 

 under the name of M. Whiteana. Kroyer confounded the species with his M. 

 Fabricii, a fact which may easily be proved on examining the several figures he 

 gives in the work of Gaimard. Indeed, the greater number of these figures 

 evidently belongs to the present species, and not to M. Fabricii. The present 

 form may be easily distinguished from any of the preceding species by the com- 

 paratively short and stout inferior antenna; and legs, as also by the peculiar 

 structure of the uropoda. The caudal segment, moreover, differs both in shape 

 and armature from that in the said species. 



Occurrence. — I have found this form occasionally off the south and west 

 coasts of Norway, in comparatively shallow water. 



Distribution. — British Isles (Goodsir, Sp. Bate), Kattegat (Kroyer)?. 



5. Munna palmata, Lilljeborg. 



(PI. XLVI, fig. 2.) 

 Manna palmata, Lilljeborg, Ofvers. Vetensk. Akad. Furhandl. 1851, p. 23. 



Specific Characters. — cf. Body rather robust, with the anterior division 

 oblong oval in form, and but slightly dilated in the middle. Caudal segment 

 comparatively large, exceeding half the length of the anterior division of the 

 body, lateral edges bulging in front, and each armed with 4 strong denticles, tip 

 obtusely rounded, and without any serrated plates. Eyes comparatively large, 

 semi-globose, placed on very prominent processes. Superior antenna; rather small, 

 flagellum 4-articulate. Inferior antenna? considerably exceeding the body in length, 

 and unusually strongly built, the last 2 joints of the peduncle being rather thick and 

 somewhat dilated at the end, flagellum narrowing very abruptly, and scarcely longer 

 than the last peduncular joint. 1st pair of legs exceedingly strong with the carjtus 

 of cpiite an extraordinary size, oval in form and very tumid, being produced at 



