CRUSTACEA OP FEANZ-JOSEr LAISTD. 91 



frequent occurrence than Cfinmarchicus, and appeared to be more 

 generally distributed ; but most of the specimens were collected 

 in the neighbourhood of Cape Flora. Some of the adult females 

 of this species were comparatively of large size; one that was 

 measured was fully 8 millimetres (nearly one-third of an inch) 

 in length from the forehead to the end oE the caudal furca. 



G-enus Psetjdocalai^us, Boech, 1872. 



PSEUDOCALANUS ELONGATTJS {BoecJc). 



1864. Clausia elongata, Boeck (5), p. 10. 



This species was observed in several tow-net gatherings and 

 was moderately frequent in a few of them. Both male aad 

 female specimens were observed. They occurred chiefly in 

 gatherings from the neighbourhood of Cape Flora. 



Grenus Euch^ta, Pliilippi, 1843, 



EucH^TA NORVECriCA, Boeck. 



1872. Euclusta norvegica, Boeck (7), p. 40. 



A single, scarcely mature specimen of this 'EuclicBta was 

 captured with the tow-net about one and a half miles south-west 

 of Elmwood on June 9tb, 1897. 



Family Centbopagid^. 



Genus Metridia, BoecJc, 1865. 



Meteidia longa {Luhhock). (PI. 4. figs. 16, 17.) 

 1854. Calanus longus, Lubbock (51), p. 127, pl. 5. fig. 10. 

 This species was rather common in tow-gatherings collected in 

 the neighbourhood of Cape Flora, as, for example, off Elmwood, 

 near East Glacier, &c. A considerable proportion of the specimens 

 were immature. It is difficult to distinguish immature specimens 

 of Metridia longa from those of Metridia hibernica ; the adults 

 of M. longa may be recognized by their larger size; but satis- 

 factory identification can only be arrived at by the careful ex- 

 amination of structural details in mature specimens. Metridia 

 longa has been recorded from the Faroe Channel. Some time 

 ago I bad the privilege of examining a series of tow-net gatherings 

 collected between the Shetland Islands and Faroe, but the only 

 Metridia obtained in these gatherings was M. hibernica (Brady 

 & Eobertson). [^Metridia longa (Lubbock, 1854) is identified 

 as Metridia armata, Boeck (1865), but not Metridia arniata, 



LINK. JOUEIS", — ZOOLOGY, VOL. XXVII. 8 



