TEEMATODES FROM EISHES — CLINTON 157 



blotches of red, and a ground color of dark blue. The mucous mem- 

 brane of the mouth and the tongue was thickly covered with cysts. 



In all cases but one the distomes which were removed from cysts 

 and examined belonged to the species G. lingua. The exception was 

 in cysts from two specimens of Menidia notata seined in Great Har- 

 bor, August 29, 1908, two cysts on the caudal fin of each, and three 

 on each side of one. 



The foregoing' tabular summary is unsatisfactory in some particu- 

 lars. For example these cysts are of rather frequent occurrence in 

 Microgad-us tomcod and PoroTiotus triacanthus^ wliich could hardly 

 be inferred from the table. 



The life history of this distome has recently been worked out by 

 Dr. H. W. Stunkard. An abstract of his paper appeared in the Col- 

 lecting Net, vol. 5, p. 268. 



Family CLINOSTOMIDAE Liihe, 1901 



Genus CLINOSTOMUM Leidy, 1856 



CLINOSTOMUM MARGINATUM (Rndolphi) 



Clinostomum marginatum (Rudolphi) H. L. Osboen, Biol. Bull., vol. 20, pp. 350- 

 356, pi. 1, 1911 ; Jouru. Morph., vol. 23, pp. 189^228, pis. 1-3, 1912. 



The following records of the encysted stage of this widely dis- 

 tributed parasite add some localities to those included in Osborn's 

 publications. 



Hosts. — Brook trout {Salvelinus fo7itino.lis) ., large-mouthed black 

 bass {Huro fioTidana)^ small-mouthed black bass {Mioropterus dolo- 

 inieu)^ yellow perch {Perca flavescens) . 



Record of collections. — Two distomes of this species, from the flesh 

 of the brook trout from Alder Lake, Delaware County, N. Y., were 

 sent to me by Dr. Tarleton H. Bean ; date of sending November 27, 



1910. Length of larger, 7 mm. ; breadth, 0.8 mm. 



A considerable number of trout (U.S.N.M. No. 8395) were ex- 

 amined for flesh parasites at Alder Lake from June 26 to June 28, 



1911. Unfortunately the notes of this examination are missing. 

 Distomes were found in the flesh of several trout, usually just beneath 

 the skin. They were not numerous in any of the fishes. Specimens 

 mounted in balsam measure from 3.6 to 8 mm. in length. Measure- 

 ments of one of the larger specimens in balsam : Length, 8 mm. ; maxi- 

 mum breadth, 1.9 mm.; oral sucker, length, 0.30 mm., breadth, 0.33 

 mm. ; ventral sucker, length, 0.85 mm., breadth, 0.92 mm. 



Alder Lake is about 40 acres in extent. No other fish than trout 

 are in the lake. 



Ten large-mouthed black bass (U.S.N.M. No. 8394), taken in Bass 

 Lake, White Earth Reservation, Minn., and preserved in formalin, 



