8 PROCEEDINGS OF THE NATIONAL MUSEUM. VOi>. (54. 



SPONGIOBOTHRIUM VARIABILE Linton. 



1889, pp. 462-464, pi. 2, figs. 13-19. 



1890, pp. 778-780. 

 lS97a, p. 442. 



1900, p. 275. 



1901, p. 433. 

 1905, p. 347. 

 1908&, p. 168. 

 1910a, p. 695. 

 1911, p. 589. 



Records of this cestode not before published: 



Dasyhatis centrura. 



Collected in six of the years from 1903 to 1922, inclusive : On two 

 dates in June, few on one date, 4 and fragment on the other ; on one 

 date in July, 40, bothria mobile, in some cases with rather long and 

 slender pedicels, and with a tendency to attach themselves to the 

 bottom of the dish ; on two dates in August, many on one date^ col- 

 lected by Dr. G. A. MacCallum, 1, length 40 mm., in alcohol, on the 

 other; on two dates in September, few on one date, 10 on the other, 

 bothria seen to be pedicellate; on one date in October, 4, maximum 

 length 40 mm. 



1923: On one date in July and one in August; 1 on each date; 

 length 30 mm. 



(U.S.N.M.^ Helm. Coll. 7660.) 



ECHENEIBOTHRIUM VAKIABILE van Beneden. 



18896, pp. 460-462, pi. 1, figs. 9-13. 

 1890, pp. 766-767. 

 1897a, p. 440. 



1900, p. 274. 



1901, p. 431. 

 1911, p. 586. 



Kecords of this cestode not before published : 



Raja diaphanes. 



Collected in 12 of the yeai-s from 1904 to 1916, inclusive: On 4 

 dates in April, 30 skates examined ; 1 to 3 strobiles, maximum length 

 30 mm. On 10 dates in May, 51 skates examined, 1 to 3 strobiles, 

 maximum length 90 mm.; numerous free, ripe proglottides on 3 

 dates ; on one date 35 skates were examined, and but 1 strobile found, 

 length 10 mm. On 1 date in June, 1 skate examined; 2 strobiles, 

 length 45 mm., and a few fi-ee, ripe proglottides, largest 8 mm. in 

 length. On 2 dates in August ; 2 skates examined ; 2 strobiles. On 2 

 dates in September; 1 to 3 strobiles, maximum 30 mm., and a few free 

 proglottides. On 12 dates in October; 74 skates examined; 1 to 14 

 strobiles, maximum 30 mm. free proglottides on one date. On 2 dates 

 in November; 1 to 3 strobiles, maximum 25 mm. 



