TREMATODE PARASITES OF BIRDS LINTON 



23 



Dimensions 



Length 



Breadth of oral sucker 



Breadth of pharynx 



Breadth of ventral sucker 



Length of right testis 



Breadth of right testis 



Length of left testis 



Breadth of left testic 



6. 10 



.42 

 .22 

 1.36 

 . 53 

 .56 

 .53 

 .47 



GALACTOSOMUM COCHLEARIFORME (Rudolphi) 



Figure 52 



1819. Distoma cochlearifoiyne Rudolphi, Entoz. Syu., pp. 681-682. 



1902. Microlistrum cochleariformc (Rudolphi) Brauni, Zool. Jahrb. Syst., vol. 



16, p. 56. 

 1911. Galactostomum cochlear i forme (Rudolphi) Pbatt, Zool. Anz., vol. 38, pp. 



143-148. 



The immature trematode here described was collected from the 

 intestine of a man-o-war bird {Fregata inagnificens) , at Bird Key. 

 Tortugas, July 8, 1907, by Dr. J. B. Watson. 



Dimensions in balsam : Length 2.3 mm. ; breadth, at oral sucker 

 0.42, at middle of neck, maximum, 0.70, at genital sucker 0.49, at 

 posterior third 0.51; oral sucker, length 0.15, breadth 0.19; genital 

 sucker, length 0.08, breadth 0.08; pharynx, length 0.11, breadth 0.08. 



The muscular neck is broader than the body and appears to be itself 

 an organ of adhesion. The pharynx is pyriform. There is no 

 esophagus, and the intestinal rami extend to the posterior end. The 

 cirrus-pouch is dorsal and at the right of the genital sucker. Behind 

 it, and probably continuous with it, is the relatively large and muscu- 

 lar seminal vesicle. Their exact relation is not clearly shown in the 

 mounted specimen. The lobed testes lie on the median line, one be- 

 hind the other, and separated from each other by a space about equal 

 to the longer diameter of a testis. They are nearly equal, and about 

 0.13 in length and 0.17 in breadth. The small, nearly round ovary 

 lies a short distance back of the seminal vesicle and a little to the 

 right of the median line. Its length is about 0.07 and its breadth 

 about 0.08. The vitellaria are lateral, between the rami of the in- 

 testine and the margins, and extend from near the posterior end for- 

 ward to a point on a level with the ovary on the left side, and about 

 to the seminal vesicle on the right side. The uterus is not shown 

 plainly in the mounted specimen. It could be seen indistinctly, how- 

 ever. A diagrammatic representation of its apparent course is shown 

 in Figure 52. Ova had not yet made their appearance. (Cat. No. 

 7943, U.S.N.M.) 



