102 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64. 



amined; (2) 1, very small, 1 fish examined; 2 dates in September, 1, 

 on each date, large, no pigment, 3 fish examined on 1 date, 14 on the 

 other; 1 date in October, few, lodged in cyst-like structure which 

 was destroyed before its real nature was determined, probably a 

 part of the cystic duct. 



Merluccius hilinearis. 



Collected in 6 of the years from 1903 to 1913 : On 1 date in July, 

 few, very small, red pigment in neck; 5 dates in August — (1) few, 

 red pigment, 1 fish examined; (2) many, small, simple bothria, 

 distinct myzorhynchus, 10 fish examined; (3) many, small, rudi- 

 mentary costae, red pigment spots, 16 fish examined; (4) few, from 

 gall-bladder, collected by Dr. C. W. Hahn; (5) 1, rather large, 

 with costae, but no pigment, 1 fish examined. 



Microgadus tomcod. 

 1910, July 13 : 1 ; 2 red pigment spots in neck ; Dr. C. W. Hahn. 

 1913, September 23 : 1, 6 fish examined. 

 1915, February 16 : 1, 50 fish examined. 



Morone americana. 



1912, October 28: Few, 5 fish examined. 



1913, April 21 : 50, 1 to 2 mm. in lenght, 2 fish examined. 



Mugil cephahis. 



1913, September 16: 2: length in formalin 1.40, breadth 0.36, 30 

 fish examined. 



Opsanus tau. 



1898, October 28 : Numerous, small, from intestine. 



1910, August 5 : Numerous, large, in cystic duct, where they are 

 clustered as in the squeteague and flounder; no pigment, 7 fish 

 examined. 



1913, September 29 : 1, 13 fish examined. 



Osmerus mordax. 



1911, October 23 : 1 ; length 0.75, breadth 0.36, length of bothria 

 0.21, 8 fish examined. 



Palinurichthys pe rcifoimis. 



1910, August 22: Numerous; 2 red pigment spots. 

 1920, August 6:1. 



Paralichthys dentatus. 



Collected in 5 of the years from 1903 to 1920, inclusive : As in the 

 squeteague, so in the summer flounder, these larvae are common in 

 the cystic duct, where they are often in large numbers, clustered 

 together with their heads in the mucous membrane. Much smaller 

 examples occur in the intestine. Ked pigment and rudiments of 



