ART. 13 TREMATODE PARASITES OF MARINE MAMMALS PRICE 7 



CAMPULA OBLONGA Cobbold, 1858 



Plate 1, Figures 2-5 



Synonyms. — Distonmm ohlongum (Cobbold, 1858) Braun, 1892, 

 p. 99; Distomum {Brachylahnus) oblongwiii (Cobbold, 1858) Stos- 

 sich, 1892, pp. 16-17; Brachycladkim ohlongum (Cobbold, 1858) 

 Looss, 1902, p. 716; Distomum tenuicolle Rudolphi of Olsson, 1893, 

 p. 9. 



Description. — CatnpvJa: Body elongate, 4 to 7 mm long by 1 to 

 3 mm wide, anterior end obtuse, posterior end rounded. Cuticle 

 armed with pointed spines, 44/x, long by 14/a wide, arranged in 

 alternating transverse rows. Oral sucker subterminal, 310)u, to 340/* 

 in diameter; acetabulum 430^ to 4C5/A in diameter, situated a little 

 less than one-fourth of the body length from the anterior end. 

 Pre23harynx very short and wide; pharynx piriform, 310/a to 360/a 

 long by 170/i to 220^ wide; esophagus about IOO/a long. The short, 

 anteriorly directed, intestinal ceca extend beyond posterior margin 

 of the oral sucker and are not provided with lateral diverticula; 

 the posteriorly directed branches are more or less zigzag and 

 extend to the posterior end of the body, where they open into a 

 depression in common with the excretory vesicle; the posterior 

 branches of the intestine are provided with short median and lateral 

 diverticula. The excretory vesicle is tubelike and extends anteriorly, 

 dorsal to testes, to the level of the posterior margin of the ovary; 

 it is slender at the posterior end, but becomes progressively wider 

 anteriorly. The genital aperture is situated immediately cephalad 

 of the acetabulum; genital sinus small. Cirrus pouch somewhat 

 pestle shaped, slightly curved, and extending caudad to a point 

 about midway between the posterior margin of acetabulum and the 

 anterior margin of ovary. The greater part of the cirrus pouch is 

 filled with a sinuous seminal vesicle. Cirrus unarmed, protrusible. 

 The testes are deeply lobed, tandem in position, and occupy the 

 equatorial third of the body ; the anterior testis is 620ju, to 770/i, long 

 by 770/A to 990/x, wide, and the posterior testis in 620/a to 1 mm long by 

 770/x, to 1.2 mm wide. Ovary transversely oval, 186/x to 372/a long 

 by 310/A to 527yu, wide, situated immediately cephalad of anterior 

 testis and to the right of the median line. Seminal receptacle 

 greatly reduced in size or (?) absent (Nicoll described a small 

 seminal receptacle, but the writer has been unable to demonstrate 

 this structure in the specimens at his disposal) ; Laurer's canal 

 present. Vitellaria abundantly developed, the follicles being dis- 

 tributed over the entire dorsal surface from the level of the pos- 

 terior end of the esophagus to the posterior end of body; ventrally 



