352 



BULLETIN OF THE BUREAU OF FISHERIES. 

 Elops saurus, Big-eyed Herring. 



CESTODES. 



1. Ehynchobothrium sp. [Figs. 99, 100a.] 



Two in oval cysts on viscera. Dimensions, life, in millimeters: Cyst, length 5, breadth 3; blasto- 

 cyst, length 5, breadth 2.5. Larva, flattened under cover-glass, length 7.35; breadth of head 0.9; length 

 of bothria 0.77; length of head and neck to base of bulbs 4.2; length of bulbs 0.5; diameter of 

 proboscis near base 0.062 without and 0.078 with hooks, at middle 0.04 without and 0.068 with hooks; 

 length of longest hooks 0.03. During life the larva was very active, the bothria changing shape with- 

 out pause. Head broader than long, water-vascular system conspicuous, a labyrinth of vessels in the 

 head and extending halfway or more to the margins of the bothria. 



Hooks for the most part rather long and slender, but moderately curved and not presenting a 

 great variety of shape or size. 



A specimen with hooks much like these was found in Scomh romorus moculcUus. 



Brevoortia tyrannus, Menhaden, Fat-back. 



NEMATODES. 



1 . Immature nematode. 



1901.— July 23, 1, small; type with diverticulum mi both intestine and oesophagus; see 

 introduction. 



TREMATODES. 



1. Dactylocotyle sp. [Fig. 151.] 



1902. — July 23, 1, an imperfect specimen from the gills. 



2. IHstomum appendiculaium Rudolphi. [Fig. 160.] 



Sj imen in poor condition and determination of species uncertain. Aug. 7, 1902; 1, small, testes 



small, ovary close to testes; vitellaria two, small, not lobed, close to ovary; length 0.63; breadth 0.18; 

 diameter of oral sucker 0.05, ventral sucker 0.10; ova 0.025 by 0.018. 

 .",. Distomum pyriforme Linton. 



1902.— Aug. 7, 1, small, partly macerated; length 1.05, no ova. 



PARASITIC COPEPODS. 



■4. Brachiella sp. 



looi'. -July 23, 1, attached among gill-rakers. 



