NO. 2063. NORTH AMERICAN PARASITIC C0PEP0D8— WILSON. 647 



reference to the mouth tube. In the Lernaeopodinae they are close 

 together and close to the mouth- tube; ui the Tracheliastmae they are 

 close together, but are removed from the mouth tube ; in the Clavel- 

 Imae one of them is close to the mouth tube while the other is sepa- 

 rated, and here in the Brianellinae they are both separated but at dif- 

 ferent distances. Such a completion affords gratifying proof that the 

 original basis of systematization was well chosen. 



BRIANELLA, new genus. 



Generic characters of female. — Cephalo thorax in line with the sec- 

 ond maxillae and at right angles to the trunk axis, considerably 

 longer than the trunk and about the same length as the second 

 maxillae; separated from the trunk by a distinct groove; trunk pear- 

 shaped, with posterior processes dorsal to the egg strings; first 

 antennae rudimentary knobs ; second antennae biramose and chelate 

 at the tips; mouth area depressed or telescoped into the anterior 

 surface of the head; second maxillae partially fused, each terminating 

 in a dichotomously branched horn instead of a common bulla; 

 maxiUipeds reduced to papillae and terminating in small spines 

 instead of claws. 



Male. — Unknown. 



Type. — Brianella corniger, new species. 



(Brianella, to Dr. Alessandro Brian, who has pubUshed many 

 valuable memoirs on the parasitic copepods.) 



Remarlcs.— In addition to the separation of the second maxillae 

 and maxiUipeds from each other and from the other mouth-parts, 

 this genus also offers a strikmg contrast to every other genus in the 

 Lernaeopodidae in the absence of a bulla and the presence of dicho- 

 tomously branched horns, similar to those found on the head of some 

 of the Lernacidae. And yet this is but little different from what 

 we find in the genus Charopinus, where the second maxillae are en- 

 tirely separate and end in enlarged disks, or fingerhke processes. 

 It is but a short step from those processes to these horns, and the 

 two are probably formed in a very similar manner. The removal 

 of the maxillary glands to the cephalothorax is also similar to what 

 is found in several genera of the Clavellmae. This genus, therefore, 

 in its morphology as well as in the arrangement of the mouth parts, 

 stands between the Lernaeopodinae and the ClaveUinae. 



BRIANELLA CORNIGER, new species. 

 Plate 41, figs. 109 to 113. 



Host and record of specimens. — Two adult females with egg strings 

 were obtained from the gills of a ray off the coast of Lota, Chile. 

 The more perfect specmien is numbered 43573, U.S.N.M., and is 



