NO. 1573. PARASITIC COFEFODS— WILSON. 431 



This can not be regarded as an abundant species, since in only one 

 or two instances has more than a single adult female been found on 

 the same fish. But it may be saitl to be common, since nearly every 

 shark so far examined has yielded its specimen. 



The IT. S. National Museum collection includes the following, all 

 from Woods Hole and vicinity unless otherwise stated : 



From the sand shark, Carcharias littoralis, Cat. No. 6029, U.S. N.M. 

 (5 males) ; C^at. No. 8127, U.S.N.M. (5 males) ; Cat. No. 32744, U.S.N.M. 

 (1 male) ; Cat.No.32788,U.S.N.M. (2 females) ; Cat. No. 32793,U.S.N.M., 

 (2 females) ; Cat. No. 32795, U.S.N.M. (young female) ; C^at. No. 32834, 

 U.S.N.M. (5 males). 



From gray shark, ('at. No. 8183, U.S.N.M. (2 females). 



From dusky shark, Carcharhinus ohsn/rus, C^at. No. 6033, I^.S.N.M. 

 (7 males). 



From flounder. Cat. No. 32740, U.S.N.M. (1 male). 



From caudal peduncle of Fuiidulus ryiajalis, Cat. No. 32743, U.S.N.M. 

 (L male). 



From man-eater shark. Cat. No. 32786, U. S.N.:M. (2 females). 



From smooth dog-fish. Cat. No. 32787, U.S.N.M. (1 male). 



From sharp-nosed shark, Scoliodon terrse.-nov8c , Cat. No. 32790, 

 U.S.N.M. (1 female;) Cat. No. 32792, U.S.N.M. (7 females). 



From Sphyrna tihuro, at Beaufort, North Carolina, Cat. No. 32791, 

 U.S.N.M. (1 female). 



From S phyrna zygsena , also at Beaufort, North Carolina, Cat. No. 

 32794, U.S.N.M. (10 females). 



NESIPPUS ANGUSTATUS Van Beneden. 



Nogagus angustatus Van Beneden, 1892, (6), p. 245. pi. i, ligs. 5-10. 

 FandariLS affinis Van Beneden, 1892, (/;) p. 22(), pi. i, figs. 5 and 7-11 (th(! male 

 form only). 



In 1892 Van Beneden described The Male of Certain Caligids and a 

 new Genus of the Family." The second male described was given 

 the name Pandarus affinis. Beneden says that this new species was 

 obtained " sur des Squales non determines de la bale de Dakar: 

 nous en possedons les deux sexes; une femelle et deux males. I^e 

 corps de la femelle a une longeur de 6 millimetres; les ovisacs, 10 

 millimetres; les appendices, en general, sont completement les memes 

 dans les deux sexes, aussi bien ceux de la tete cjue ceux du thorax." 



Then follows a description of the two sexes which is sadly lacking 

 in just those particulars most essential for the determination of the 

 species, namely in the details of the appendages. 



The only appendages described for the female are the first antenna^? ; 

 of the male, nearly all the appendages are mentioned, but no definite 

 data are given for any of them. In the figure showing a dorsal view 



aBulletins de I'Academie royale de Belgique (3), XXIII, No. 3, pp, 220-235. 



