360 



H1LI.ETIN OF THE BUREAU OF FISHERIES. 



Menidia menidia, SUverside. 



NEMATODES. 



I Tmmature nematode* ( Ascaris). 



Common type, diverticula to. both intestine and cesophagus. 

 L902.— July 19; Eew. Aug. 7; few. 



CESTODES. 



2. Scolex polymorphic Rudolphi. 



Aug. 1, minute forms seen in small piece of intestine which was being examined under the 

 compound microscope for the food contents. 



TREMATODES. 



:'.. Distomum montieettii Linton. 



Aug. 7; I, voluminous intestine; no ova. 

 I. Distomum sp. 



This form resembles that figured in Parasites of Fishes of the Woods Hole Region, figs. .';.">7, 358. 

 The body of this worm is densely clothed with exceedingly minute spines. 



Dimensions, life, in millimeters: Length 0.94; diameter, anterior 0.07, middle 0.22, posterior end 

 0.12; diameter of oral sucker (nut distinct) 11.04, of ventral sucker 0.09, of pharynx 0.118; ova 0.01 s by 

 0.014. 



Aug. 7; 1. The measurements of this specimen agree closely with the foregoing; the oral sucker, 

 which was more plainly seen than in the specimen of July 7, measured O.os mm.; length 0.93; diame- 

 ter 0.27; ventral sucker 0.11, pharynx 0.04; ova 0.025 by 0.018. 

 5. Distomum pyriforme Linton. 



.Inly 7; 2. July S; 1. July 23; 1. 

 o. Gasterostomum gracilescens Rudolphi. [Fig. 236.] 



See also under Caranx, Menidia, Opsanus, Paralichthys, Pomatomus, Spheroides, Stolephorus, and 

 Tylosurus. 



July 8; 1; length 0.75; greatest breadth 0.44; anterior sucker 0.2; mouth sucker 0.05. .Inly 17; 

 12; small, oval, densely clothed with squarish spines; length 0.0, breadth 0.4; encapsuleil, in some 

 cases more than one in a capsule. July 23; few, small, not in good condition. Aug. 1; few. Aug. 7; 

 several in yellowish cysts on viscera, small, oval. Aug. 11; few in cysts on viscera. 

 7. Monostomum sp. 



This is the same species as No. 5 under Fundulus majalis. July 22; 3. 



i 0PEP0D PARASITES. 



s. Ergasilus sp., from gills. 



Aug. 7; several; length, including egg masses, 1.5 mm.; length of egg mass 0.7 mm. 



Mug-il curema, White Mullet. 



