FA RA Sine COPEPODS— WILSON. 397 



PANDARUS BREVICAUDIS Dana. 



Plate XXXVI. 



Pandarus brevicaudis Dana, 1852, p. 1368, pi. xcv, figs. 3 a-h. 

 Pandariis brcvicaudatus Bassett-Smith, 1899, p. 467. 

 Nogagtis validus Dana, 1852, p. 1363, pi. xciv, figs. 9 a-h. 



This species includes the two sexes obtained from a shark taken 

 in the Pacific Ocean, northeast of New Zealand, in the 3^ear 1840. 

 The female Dana described under the name Pandarus brevicaudis, 

 and the male under the name Nogagus validus. 



No subsequent mention is made of the species until 1889, when 

 Thomson includes it in his list of the parasitic copepods of New 

 Zealand, on Dana's authority. He did not see any specimens him- 

 self, and he adds that Dana's description ''is brief and unsatisfactory." 

 In his Entomostraca from the Gulf of Guinea, published in 1894, 

 Scott mentions a single specimen of Nogagus validus which was taken 

 in a tow net gathering from a depth of 30 fathoms. And finally 

 Bassett-Smith in his Enumeration of KnoA\Ti Species in 1899 men- 

 tions both Nogagus validus and Dana's three species of Pandarus. 

 He calls the latter, however, ^^ Pandarus hrevicaudatus, satyrus, and 

 cocinnatus," and says of them . , . ''From Sharks in the Pacific 

 Ocean: imperfectly described" (p. 467). His criticism would have 

 had more weight if he had shown enough familiarity with Dana's 

 descriptions to spell correctly the specific names which the latter 

 used. 



The descriptions Dana has given are brief, but they are also very 

 accurate, and, taken with the excellent figures he published, they 

 do not seem to deserve bping called either unsatisfactory or imper- 

 fect. The following includes practically all that was given hj Dana, 

 with the addition of many new facts, especially with reference to 

 the male. 



Female. — Carapace, including the posterior lobes, slightly longer 

 than wide, suboval, narrowed anteriorh^. Frontal plates narrow and 

 appressed closely to the carapace; scarcely enlarged at their outer 

 ends, where they overlap two-tliirds of the basal joints of the first 

 antennae. Posterior lobes remarkably long, half the length of the 

 carapace on the nud-line and reaching back to the posterior margin 

 of the third segment; triangular in shape wath obtuse ends. Poste- 

 rior margin of the carapace between the lobes smooth, with no trace 

 of teeth or spines, and slightly concave. Eyes close together and 

 about two-fifths of the length of the carapace from its anterior 

 margin. 



Dorsal plates on the second thorax segment fused across the mid-Hne 

 by a band which is longer than the second or third pair of plates, and 

 wliich causes the segment to resemble very closely the corresponding one 

 in the male, the slightly oblique wings on the lateral margins answ^er- 



