NO. 1123. PEOCEEDIXaS OF THE NATIONAL MUSEUM. 791 



3. In a vial coutaiuing a cyst of a Bhynchohothria imiis from the peri- 

 toueuui of the scup {Stenotomiis rhri/sops), Woods Holl, Massachusetts, 

 July 23, 1887. 



I find specimens of hxvval Tetrabothria identical with those from 

 cystic duct of Cynoscioii regalis. Length, 0.7 inm.; breadth, 0.3. mm. 



My note made at the time of collecting is: "Xo. 105, July 1*3, 1887. 

 Examined about a dozen specimens of Stenotomus chri/so^js found only a 

 few cysts and embryo Cestodes." The latter may refer to the specimens 

 here described. 



4. 1 have found a narasite, which agrees exactly witli those from the 

 cystic duct of the Squeteague, in tlie common flounder [FaraUdithys 

 (lentatus), at Woods Holl, Massachusetts, on three different occasions, 

 namely, August, 1884, July 1(5 and 23, 1887 (Xo. 4788 U.S.N.IM.). 



Among the flounders examined July 10, 1887, was one whose cystic 

 duct was infested with these parasites in the same manner as tliat of 

 the Squcteague. 



One specimen in this lot was noticed in which there was what appeared 

 to be the beginning of a bifurcation of the tail (fig. 15a). 



When specimens were placed in fresh water, many of them swelled 

 up at the anterior end, becoming club-shaped or even decanter-shaped 

 (fig. 14). In these the epidermis soon loosened and separated from the 

 body, or rose into wrinkles. 



5. Larvie identical with those from the intestine of the squeteague 

 were found on three occasions in the intestine of the goose-fish {Lophius 

 piseatorius), at Woods Holl, Massachusetts, July 7, 1885, August 

 and August 30, 1887, in enormous numbers (No. 4780, U.S.N.M.). 



In the first and second lots the living specimens varied from 1 to 2 

 mm. in length. When placed in alcohol, they become conical in shape, 

 larger end anterior, from 0.4 to 0.5 mm. in length. Head of living 

 specimen usually about 0.24 mm. in breadth, and was capable of intro- 

 version ; bothria and myzorhynchus as in specimens from squeteague. 

 Two red spots on neck. 



The specimens in the third lot varied in length from 0.8 mm. to 4.5 mm. 



Bothria four, oval, with apparently two transverse cost:e dividing 

 the bothria into three loculi. Two red spots in neck, only seen wiien 

 worm is viewed on its flat surface; in lateral, i. e., marginal, view only 

 one spot is seen. 



There is, as in specimens from squeteague, a protrusible papillary 

 eminence (myzorhynchus) with an os in the apex leading into a glob- 

 ular proboscis, as in Echeneihotlirium vaHahile. No true segments 

 appeared on any, although on tlie large specimens one or more trans- 

 verse lines divided the body into irregular pseudosegments. 



In a specimen which was placed in fresh water the bothria contracted 

 and were directed forward, and the head assumed a globular shape. 



The four bothria with the central os then gave to the head a strong 

 resemblance to the head of Tmnia. 



