219 



2 middle joints of the terminal part imperfectly separated, last joint very 

 narrow and prolonged, with the apical setae unusually long and delicate. 

 Posterior antennae likewise comparatively slender, with the penultimate joint 

 verry narrow and having the anterior setiferous ledge placed near the base. 

 Legs moderately prolonged, last pair with the 1st joint of the terminal part 

 about the length of the other 2 combined. 



Male of somewhat larger size, than female an differing conspicuously in 

 the shape of the shell, which is comparatively less tumid and, seen laterally, 

 more oblique, with the dorsal margin nearly straight and angularly bent both 

 in front and behind. Copulative appendages with the basal part oblong oval 

 in shape and wanting any freely projecting string insides, terminal part pro- 

 duced in front to an obtuse point and almost rectangular behind. 



Colour of shell light yellowish, with very conspicuous dark specks. 



Length of adult female 0.64 mm., of male 0.68 mm. 



Remarks. The present form was recorded as early as the year 1850 by 

 Baird as a species of Cythere. It was however not recognised by the sub- 

 sequent authors, who described it under several other specific names, as seen 

 from the above-given list of synonyms. Indeed, I cannot doubt, that both the 

 form described by Lilljeborg as Cythere viridi's and that recorded by Zencker 

 as C. flavida are in reality identical with the present species. Brady and 

 Norman have however referred these forms to a separate species named 

 Loxoconcha viridis, and quote as a synonym Loxoconcha elliptica Brady. In 

 my opinion the 3 said forms are quite undistinguishable from the ahove 

 described species. Being that recorded at the earliest date, it ought of course 

 to be regarded as the type of the present genus. 



Occurrence. This is one of our commonest Cytherids, being found rather 

 abundantly along the whole of our coast in the littoral zone among algae, on 

 the leafs of which the animals are seen to climb with great dexterity by the 

 aid of their slender posterior antennae and legs. 



Distribution. British Isles, Kattegat, Baltic, coast of France, Mediterranean. 



Fossil. Norway, British Isles, Calabria. 



114. Loxoconcha granulata, G. O. Sars. 



(PI. CII, fig. 1). 

 Loxoconcha granulata, G. O. Sars, Oversigt af Norges marine Ostracoder, p. 



Specific Characters. Female. Shell moderately tumid, seen laterally, more 

 angular in shape than in the preceding species, greatest height a little behind 

 the middle and scarcely attaining 2 /s of the length, dorsal margiu nearly straight 



