398 CRUSTACEA OP NORTHUMBERLAND AND DURHAM 



esatlentus, and the free-swimming condition in which it is 

 frequently found is probably only temporary. The parasitic 

 Crustacea of our district have been scarcely at all investi- 

 gated, and will form a rich field for future research. The 

 identification of this species with Ascomyzon echinicola Norman 

 appears to have been erroneous. There are rather conspicuous 

 differences in the fifth pair of feet and other points, but these 

 need examination with the aid of further specimens, not at 

 present attainable. D. 



AsTEROCHERES BoECKi (G. S. Brady). 



1880. Artotrogus ISoeckt, Brady (3), p. 60, pi. xci., figs. 1-9. 



1899. Asterocheres Boeckt, Giesbrecht, Die Asterocheriden 



des Golfes von Neapel und der angrenzenden Meeres- 



Abschnitte, Berlin, 1899, pp. 75 and 100, pi. i., fig. 2, 



pi. ii., figs. 22-31. 



In a tidal pool, Alnmouth, September, 1899 (G. S. B.) 



Like the preceding, probably a truly commensal or parasitic 



species only accidentally found in a free condition. N. 



Asterocheres violaceus (Glaus). 



1889. Echinocheres violaceus, Glaus, Ueber neue oder wenig 

 bekannte halbparasitische Copepoden, p. 30, pi. vi., 

 figs. I-IO. 

 1899. Asterocheres tnolaceus, Giesbrecht, loc. ctf., pp. 76 



and loi, pi. i., fig. i, and pi. ii., figs. 34-42. 

 1899. Echinocheres violaceus, Brady, On Ilyopsylbis 

 co?'iaceus and other Crustacea taken at Alnmouth. 

 Nat. Hist. Trans. Northumberland and Durham, 

 vol. xiii., p. 437, pi. xii., figs. 9, 10. 

 1899. Cyclopicera ber/iiciensis, idem ibidem, p. 438, pi. xiii., 

 figs. 1-8. 

 Two specimens taken in the free condition in a tidal pool 

 near low-water mark at Alnmouth (G. S. B.) 



The name Cyclopicera berniciefisis must be withdrawn, 

 having been founded upon a mutilated male specimen of 

 Asterocheres violaceus. 



