r 



ART. 21. PARASITES OF SHARKS AND SKATES LINTON. 103 



acetabiila and costae noted; one noted on August 16, 1906 that sug- 

 gested Phyllohothrium loliglnis. 



A case of jaundice was encountered in a flounder on August 6, 

 1908. Numerous larvae {S. polymorpkus) formed a subspherical en- 

 largement of the cystic duct. The flounder was about 40 centimeters 

 in length, and was of a bright yellow color, the muscles also were 

 decidedly yellow. The cestodes appeared to completely occlude the 

 duct, which, doubtless accounted for the jaundiced condition of the 

 fish. Larvae active, varying from 2 to 5 mm. in length ; myzorhyn- 

 chus distinct, bothria with faint costae near anterior end; some 

 with red pigment spots in neck. 



On 4 dates in July, few on each of three dates, numerous on one 

 date, 7 fish examined; on 10 dates in August, few to numerous, 37 

 fish examined ; on 1 date in October, very numerous, relatively large, 

 adhering in clusters in cystic duct near intestine, numerous in in- 

 testine, 3 fish examined. 



Paralichthys oblongus. 



1905, August 4i Few, small; 2 red pigment spots; bothria with 

 distinct acetabulum, and faint indication of costa near posterior 

 third, 4 fish examined. 



1907, June 10 : Few, 1 fish examined. 



1913, June 6 : 1 noted with well defined costae on bothria, 2 fish 

 examined. 



Pollachias virens. 



1908, August 19 : Few, 2 fish examined. 

 1912, July 1 : 1, 18 fish examined. 



Pomatomus saltatrix. 



1904, August 11 : Few, minute, length 0.06 mm., 1 fish examined. 



1906, August 27 : Few, less than 1 mm, in length, no red pigment, 

 1 fish examined. 



1911, July 17 : Few, no red pigment or costae, 10 fish examined. 

 1919, August 21 : 1, in intestine of 125 mm. fish. 



PoTTiolobus aestivalis. 



1908, August 11: 6, 2 bright red pigment patches in neck; rudi- 

 ment of anterior costa, 1 fish examined. 



1910, July 20 : Many, 6 fish examined. 



Poinolohus mediocris. 



1906, August 15: 2, small, simple bothria, no pigment, 1 fish 

 examined. 



Poinolohus psevdoharengus. 



Collected in 5 of the years fi-om 1906 to 1914, inclusive : On 1 date 

 in April, 34 in vial, no pigment in formalin material, but label stated 

 that there were red spots in the living worms; on 2 dates in May, 

 20183— 25— Proe.N.M.vol.64 40 



