86 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 04. 



about 18 mm.; length of scolex 3.5; botlirium, length 1,43, breadth 

 1.14; contractile bulbs, length 1.08; proboscides, only base everted, 

 diameter, excluding hooks, 0.18 ; length of longer hooks 0.06 to 0.08, 

 of slender hooks on opposite side of proboscis 0.018 to 0.03. 



1908, July 27: 2 cestodes found in the flesh of one out of 6 fish 

 examined for parasites in the flesh. The fish measured about 500 

 mm. in length. One cestode, 75 nmi. in length, and 1 mm. in diam- 

 eter, lay in the muscles of the right side, near the anal aperture, color 

 yellowish white; another, length 25 mm., diameter 2 mm., was found 

 on the left side near the dorsal fin. The bothria were broader than 

 long; hooks not yet developed. 



1919, August — : In a lot of cestodes from a " salt water trout," 

 presumably G. regalis^ sent by S. S. Fay, State board of health, 

 Miami, Fla., to the Bureau of Fisheries, and received by me August 

 12, plerocerci of a Rhynchobothnunnn were found, which probably 

 came from the flesh. One proboscis of one of the scoleces is partly 

 everted. The following dimensions are from a specimen mounted 

 in balsam: Length of scolex 3.20, of bothrium 0.98; diameter at 

 bulbs 0.91; length of bulb 1.12; diameter of proboscis, excluding 

 hooks, 0.21 ; length of longer hooks 0.09, of slender hooks on opposite 

 side of proboscis 0.018 to 0.03. 



(U.S.N.M., Helm. Coll. 7717.) 



These cestodes from the flesh of C. regalis appear to be the larval 

 stage of Rhynchohothrium^ species from ScoUodon terrac-novae 

 (1905, p. 343, figs. 129-130c). 



SYNBOTHRIUM FILICOLLE (Linton). 



1887, Tetrarhynchobothrium, larva, p. 195, pi. 10, figs. 7-11. 

 1890, Syndesmohothrium plicolle, pp. 861-862, pi. 15, figs. 2-A. 

 1897ft, Synbothrium filicolle, pp. 815-820, pi. 68, figs. 7-12. 



1900, pp. 277, 278. 



1901, pp. 425, 440, 451, 457, 460, 482. 



1905, pp. 341, 344, 349, 362, 363, 369, 396, 413, 415. 

 1907e, p. 113. 

 1908b, pp. 185-186. 

 1910O, p. 693. 

 1911, p. 589. 



Used as a type, without specific name, in an article entitled: 

 " Notes on two forms of cestode embryos." ^^ 



Larval stage. 



Brevoortia tyrannls. 



1905, July 27 : 1, encysted, on viscera. 



1906, August 1:1, length of plerocercus 10 mm., 3 fish examined. 

 August 7 : 1, 2 fish examined. 



1908, August 1 : 1 plerocercus in thin hyalin cyst. 



•■'American Naturalist, February, 1887, pp. 1-6 (authors reprint), pi. 10, figs. 7-11. 



