100 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64. 



1 to many in each of 22 fish measuring from 7 to 10 centimeters 

 in length. 



Cyclopterus lumpus. 



1915, May 6 : 18, 2 to 5 mm. in length in formalin, 1 fish examined. 

 (U.S.N.M., Helm. Coll. 7729.) 



Cynoscion regalis. 



Collected in 6 of the years from 1903 to 1910, inclusive : Usually 

 present in the cystic ducts of squeteague, where they occur in consid- 

 erable numbers in clusters with heads buried in the mucous mem- 

 brane; much smaller examples occasionally met with in the intes- 

 tine. Some with red pigment spots, some without ; some with plain 

 bothria, some with rudiments of acetabula and costae. On about 

 12 dates in July, in cystic ducts of 47 out of 59 fish examined, and 

 on about 15 dates in August, in 42 out of 44 fish examined. The 

 following measurements were made on living specimens collected 

 July 19, 1905: From the cj'stic duct a typical specimen varied in 

 length from 2.5 to 6 mm., breadth 1 mm. when contracted. A speci- 

 men from the intestine varied from 0.11 to 0.28 mm. in length, and 

 from 0.03 to 0.07 mm. in breadth. 



Decapterus macarellus. 



1918, August 7: Few, in each of three 95-mm. fish. 



1920, August 17: 5 small, 1 fish examined. A distinctly progres- 

 sive movement v/as observed in one which was creeping on the 

 bottom of the dish, by alternately extending each of the two pairs 

 of bothria, which acted as suckers to pull the body along. 



Decapiei^s punctatus. 



1906, August 17: 18, small, no pigment; head more transparent 

 than body; bothria rather flat and leaf-like, nearly circular when 

 contracted, with transverse wrinkles which suggested rudimentary 

 costae as in the genus Rhinehothriwn; varying in length from 0.32 

 to 1.40 mm. 



Etrmneus sadina. 



Collected in 4 of the years from 1905 to 1918, inclusive: On 1 

 date in July, few, 25 fish examined; on 2 dates in August, 1 to few 

 from each of 3 fish, length, noted on 1 date, 14 centimeters; on 3 

 dates in September, 1 to few, 27 fish examined, length, noted on 1 

 date, 14.5 centimeters. Record of September 2, 1905 : Few, length 

 1.7 mm., diameter of head 0.5 mm.; a memorandum sketch made 

 at the time of collecting shows the bothria grouped into a disk-like 

 head, with no myzorhynchus, 25 fish examined. 



Gasterosteus hispiTWSUs. 



1919, July 5:3; lengths 0.37, 0.70, 0.80 mm., from one 20 mm. fish. 



