10 PEOCEEDINGS OF THE NATIONAL MUSEUM. vol.64. 



(U.S.N.M., Helm. Coll. 7662.) 



1923 : 20 on one date in July, maximum length 16 mm. ; 4 on one 

 date in August, all small. 



Larval stage. 



Scomber' colias. 



1910, August 22: A cyst from the viscera of a chub mackerel con- 

 tained a larval Rhhiebothriuta which appears to belong to this 

 species. The cyst measured 1 by 0.17 mm., and was thin walled; 

 blastocyst not satisfactorily made out ; larva with strap-shaped both- 

 ria, provided with many loculi, and hinged in the middle, so that the 

 scolex, when flattened under the cover glass, appeared to have eight 

 bothria directed forward; length of bothrium 0.7 mm. 



RHINEBOTHRIUM LONGICOLLE Linton. 



1890, pp. 775-778, pi. 6, figs. 1-4. 

 1S97«, p. 441, pi. 33, figs. 2-4. 



1 0tC^ ri 07,-: 



1900, p. 275. 



1901, pp. 433, 434. 

 1911, p. 585. 



Records of this sj)ecies not before published. 



Dasyhatis ceidrura. 



1914, August 1 : 6, collected by Dr. G. A. MacCallum. 



Myliohatis freminmlUi. 



1903, July 11 : 5 strobiles with scoleces, and about 8 with scoleces 

 missing; length of longest about 28 to 30 mm. 



(U.S.N.M., Helm. Coll. 7663.) 



Rhinoftera quadriloha. 



1917, July 12 : 40, mostly adult and measuring as much as 100 mm. 

 when straightened out in the killing fluid with canieFs hair brushes; 

 ripe segments 3 mm. in length; two small strobiles measured 15 and 

 24 mm. in length, respectively. 



RHINEBOTHRIUM MINIMUM (Beneden) 



1897a, pp. 441-442, pi. 33. fig. 5. 

 1901, p. 431. 

 1911, p. 587. 



Records of this cestode not before published : 



Raja eglanteHa. 



1906, May 14: 5 strobiles with scoleces, with fragments and free 

 proglottides. 



