53 



Colour whitish, with a slight yellowish tinge, and generally banded dors- 

 ally with dark brown. 



Length of adult female 0.66 mm. 



Remarks. I cannot doubt that the above-described form is that originally 

 recorded by Glaus as H. gracilis. The H. elongatus of Boeck is the same species, 

 and this is unquestionably also the case with the form described by Dr. Gies- 

 brecht as H. chelifer, Miiller. Prof. Brady seems to have been acquainted with 

 both these forms; but he only regarded H. gracilis as a variety of H. chelifer, 

 though in reality it is very distinct both in the external form and in the structure 

 of some of the appendages. 



Occurrence. I have found this form occasionally in several places of the 

 Norwegian coast, as far as to the Trondhjem Fjord. It is, like H. chelifer, a 

 littoral form, occurring in comparatively shallow water among algae. 



Distribution. British Isles (Brady), Kiel Bay (Giesbrecht), Mediterranean 

 at Messina (Glaus). 



35. Harpacticus flexus, Brady. 



(PJ. XXX, fig. 2). 



Harpacticus flexus, Brady & Kobertson, Ann. Mag. Nat. Hist. ser. 4, Vol. XII, p. 134, PI. IX, 



figs. 1721. 



Specific Characters. Female. Form of body resembling that in H. gracilis, 

 though perhaps still more slender. Rostrum less prominent. Caudal rami 

 broader than they are long. Anterior antenme unusually short, being scarcely 

 half as long as the cephalic segment, 9-articulate 7 terminal part about half the 

 length of the proximal one. Posterior antennae with the outer ramus very narrow 

 and provided with only 3 setae. Posterior maxillipeds rather unlike those in the 

 3 preceding species, the hand being narrow fusiform and the dactylus very slender. 

 First pair of legs of much the same structure as in H. gracilis. Last pair of legs 

 likewise rather similnr, but with the distal joint comparatively smaller, and the 

 marginal spines shorter, scarcely setiform. 



Colour rather peculiar, the greater part of the anterior division being 

 tinged with deep crimson, cephalic segment and urosome white. 



Length of adult female 0.70 mm. 



Remarks. This form, first described by Messrs. Brady & Robertson, may 

 be easily distinguished from the other species of the present genus by the shortness 

 of the anterior antennae and the rather different shape of the posterior maxillipeds. 

 In the living state it is moreover readily recognized by its peculiar and beautiful 

 colouring. 



