374 CRUSTACEA OF NOHTSUMBERLAND AND DURHAM 

 PORCELLIDIUM FIMBRIATUM ClaUS. 



1863. PorceUidiuvi fimhriahmi, Claus (2), p. 140. pi. xxii., 



fig. I. 

 1880. Porcellidhun fiinbriahiin^ Brady (3), vol. ii., p. 167, 



pi. Ixx., figs. 1-4. 

 1904. Forcellidmin fi/nbn'ahun, G. O. Sars (6), vol. v., p. 76, 

 pis. xliv., xlv. 

 Found chiefly on the fronds of Laminariffi between tide- 

 marks, but " sometimes taken by the dredge in considerable 

 numbers where decomposing algae and other vegetable matters 

 are deposited." In our district the only record is Alnmouth 

 (G. S. B.) N. 



AsPiDiscus LiTTORALis G. O. Sars. 



1904. Aspidiscus littoralis, G. O. Sars (6), vol. v., p. 79, 

 pis. xlvi. and xlvii. 



A beautiful species, easily recognized when well grown by 

 a brilliant crimson patch occupying the centre of the body. 

 Its favourite habitat, as in the case of many of the flattened 

 or depressed Copepoda, is on the fronds of Laminarite. Here 

 it often occurs very abundantly at almost all points of our 

 coast. In the "Monograph of British Copepoda" it was 

 erroneously identified with Aspidisais fasciahis Norman and 

 Porcellidhim fasciatnm Boeck. Professor Sars, however, has 

 shown that it differs from both these species, and has proposed 

 for it the specific name littoralis. 



PSAMATHE LONGICAUDA Philippi. 



1840. Psamathe longiawda, Philippi, Weigman. Archiv fiir 



Naturgesch., p. 189, pi. iv., fig. i. 

 1880. Scntellidiuin tisboides, Brady (3), vol. ii., p. 175, 



pi. Ixviii., figs. i-io. 



1905. Psamathe longtcatida, G. O. Sars (6), vol. 5, p. 83, 

 pi. xlix. 



This has many characters in common with Tisbe furcata, 

 and is met with in similar situations, but always sparingly. 

 We have seen no local specimens excepting one or two taken 

 at Roker on the fronds of Laininaria saccharina (G. S. B.) D. 



