Mi'r.2\. PARASITES OF SHARKS AND SKATES LINTON. 99 



Acanthocottus octodecimspinosus. 



1912, November 9: 30, 6 fish examined. December 27: 1, 2 fish 

 examined. 



1913, February 15 : 1, 6 fish examined. 



Alosa sapidissinia. 



1910, July 13 : 2, two red pigment spots in neck, 1 fish examined. 



1911, July 7: Few, two red pigment spots in neck, length of both- 

 rium 0.2 mm., rudimentary costae, 1 fish examined. 



1923, July 5 : 40, length 1.26, breadth 0.56 mm. 

 (U.S.N.M., Helm. Coll. 7728.) 



Ammodytes americanus. 



1914, October 20 : 16, 100 fish examined. 



Anchovia argyrophana. 



Collected in 1905, 1906 and 1911 : On 4 dates in October, numerous 

 on 1 date, ver}^ numerous on others, several hundred in the vials, 

 length about 1.23 mm., breadth 0.5, outline long-oval, 2 fish examined 

 on 1 date, 10 on 1 date, and 50 on each of 2 dates ; 1 date in Novem- 

 ber, 5, length 2 mm., 3 fish examined. 



Anchovia hrownii. 



1906, August 15 : Many, 2 red pigment spots, rudiments of costae, 

 12 fish examined. 



Anguilla rostrata. 



1911, January 28 : 10, length in formalin 3 mm., 61 fish examined. 



1914, July 10: 3, one with distinct loculi on bothria, 9 fish ex- 

 amined. 



Brevoortia tyrannis. 



Collected in 6 of the years from 1903 to 1913, inclusive: red pig- 

 ment spots noted on 7 of the 12 dates; lengths recorded on one date 

 0.09 to 0.12 mm. On 1 date in June, 1, six fish examined; 7 dates in 

 July, 1 to numerous, 26 fish examined; 4 dates in August, 1 to few, 

 10 fish examined. 



Caranx chrysos. 



1911, October 13 : 20, length 1.5 mm., myzorhynchus with trumpet- 

 shaped border, 15 fish examined. 



C eratacanthus schoepfli. 



1908, August 19 : Many, 1 fish examined. 



Clupea harengus. 



Collected in 3 of the years from 1905 to 1919, inclusive: On 4 

 dates in July, 1 to numerous, from each of 6 fish measuring from 

 5.5 to 8 centimeters in length. On 6 dates in August, on 1 date, 

 several, minute, 40 fish examined, size not noted; on other dates. 



