NO. 2063. NORTH AMERICAN PARASITIC C0PEP0D8— WILSON. 643 



Total length, 0.65 mm. Length of cephalothorax, 0.40 mm. 



(relata, connecting or establishing a relation between several spe- 

 cies, as the type of the new genus) . 



RemarTcs.— This new species was found in great abundance on the 

 gills of a large barn-door skate, captured in about 60 fathoms of water. 

 Although only 100 specimens were taken there were fully 1,000 

 on the single fish, the gills bemg literally covered with them. The 

 present species differs from longimana in the details of the mouth 

 parts, in the structure of the second antennae, and in the shape of 

 the posterior appendages; from longibracMa it is sufficiently distin- 

 guished by the length of the second maxillae. 



Genus BASANISTES Nordmann. 



Generic characters of female. — Cephalothorax at right angles to the 

 trunk axis, with no definite demarcation between the two; no dorsal 

 carapace, abdomen, anal laminae, posterior processes, or genital 

 process; a large spherical knob on the back of the head, a row of 

 smaller knobs down the center of the back, and another row along 

 either lateral margin. First antennae short, slender, and three- 

 jointed; second pair stout and bii-amose, the exopod two-jointed, 

 the endopod one-jointed, the latter considerably larger than the 

 former and both armed with small spines. Mandibles slender and 

 curved toward the tips where they are armed with fine saw teeth, 

 all about the same size. First maxillae slender and tipped with three 

 setae; second maxillae short and wrinkled, bulla large and club- 

 shaped. Egg strings cylindrical and rather plump. Maxillipeds 

 stout and standing well in front of the second maxillae, the terminal 

 claw without accessory spines. 



Male. — Unknown . 



Type. — Basanistes Tiuchonis (Schrank). 



(Basanistes, ^riaaviax-qc, a torturer.) 



RewurTcs. — Milne Edwards, missing entirely the generic characters 

 in Nordmann's Basanistes, made of it a genus to take the place of 

 Blainville's Lernaeopoda, and included in it the two species which 

 Blainvillc had placed under Lernaeopoda. Since Blainville's genus 

 was published 10 years before Nordmann's, if it were necessary to 

 choose between the two, Blainville's name would take precedence. 

 But both genera are valid, and so the names which Milne Edwards 

 brought into this genus must be transferred bark again. 



TABLE OF SPECIES. 



1. Termiual claw of maxillipeds longer than the second joint, the latter with a stout 

 spine on its ventral surface coregoni Neresheimer, 1909. 



1. Terminal claw of maxillipeds longer than the second joint, the latter without spines 

 or knobs nordmanni Kessler, 1868. 



1 . Terminal claw of maxillipeds shorter than the second joint, the latter with a large 

 knob against which the claw shuts like a chela huchunis (Schrank), 1786. 



