ARGULUS TOLIACEUS. 229 



not with the Copepoda.* Dr. Bassett-Smith, in his e System- 

 atic description of the parasitic Copepoda found on Fishes/ 

 also excludes the Family Argulidae from the Order Cope- 

 poda.t And lastly, in the first of an important series of 

 * Memoirs on North American parasitic Copepods/ by Charles 

 Branch Wilson, that author makes the Branchiura a suborder 

 of the Copepoda, with Argulidse as the only Family. J 



There is doubtless a close relationship between the Argulidge 

 and the other parasitic groups enumerated in this volume; 

 but apparently, as indicated, there is also a considerable 

 divergence of opinion as to whether Argulus and its allies 

 should be recognized as a suborder of the Copepoda. We 

 have, however, had few opportunities for studying these 

 interesting forms, as there is only a single British species 

 known to us, and therefore we do not propose to enter further 

 into a discussion of this question. 



Tripaphylus musteli (P. J. van Beneden). pp. 160- 



161. 



Amended description of male. 



Our description of the male of this copepod parasite was 

 copied, to some extent, from van Beneden's work, as we had 

 not then seen the male ourselves. We discovered a male 

 attached to a female after the description was in type, and 

 some changes appear to be necessary to bring the description 

 more in line with the views now generally accepted regarding 

 the names of the appendages, but it was too late to do this in 

 the proper place. This description, taken from our own 

 specimen, should read as follows : 



Male. The male of this species has the body divided into 

 two unequal portions ; the anterior portion is large and carries 

 the whole of the appendages viz. one pair of antennules, one 

 pair of antennae, one pair of mandibles, one pair of maxillae, 

 and two pairs of maxillipeds; the posterior portion is much 

 more narrow and rounded and is terminated by short stout 

 f urea. The antennules, antennas, mandibles, and maxillae are 



* ' A History of Crustacea : Eecent Malacostraca.' The International 

 Scientific Series, vol. Ixxiv (1893), pp. 10 and 49. 



t "A systematic description of the Copepoda found on fishes, with an 

 enumeration of the known species," ' Proc. Zool. Soc. Lond./ April, 1899. 



" North American Parasitic Copepods of the Family Argulidae/' ' Proc. 

 United States National Museum/ vol. xxv (1902), pp. 635-742, pis. viii- 

 xxvii. 



