Helminth Fauna of the Dry Tortugas. 77 



Body oval, clothed throughout with dense, slender spines; genital 

 sucker about equal to oral and situated at about the anterior fourth of 

 the length. The pharynx is adjacent to the oral sucker: esophagus is 

 relatively long and slender. The bifurcation of the intestine is near the 

 anterior border of the genital sucker. The rami of the intestine could 

 be traced but a short distance on account of the dense vitellaria. The 

 cirrus-pouch is oval, on middle line, its long axis corresponding with the 

 long axis of the body, immediately behind the genital sucker, and fol- 

 lowed at its caudal end by the seminal vesicle. Testes 2, oval or suit- 

 globular, on the median line, one following the other and close to it, and 

 near the posterior end. Ovary oval-elliptical, on middle line in front of 

 the anterior testis. There is a yolk-reservoir between the ovary and the 

 anterior testis. The vitelline glands are diffuse and extend from the 

 posterior end to within a short distance behind the genital sucker. The 

 uterus lies between the ovary and the genital sucker; ova rather large. 

 The terminal excretory pore is conspicuous and surrounded by a charac- 

 teristic rosette-like arrangement of the muscles. 



Host, Clupanodon pseudohispanicus : July 10, 1906, 2 trematodes. 



Dimensions of smaller, life: Length 1.4; breadth, anterior 0.1 1, 

 middle 0.30, posterior 0.19; oral sucker 0.09; pharynx 0.05; genital 

 sucker 0.09; ova 0.061 by 0.047. 



GENOLOPA gen. nov. 

 Etymology: y£vos t sex; Aojrd?, a dish. 



Body covered with minute spines. Vitelline glands compact, lateral, 

 near middle of length of body; 1 testis; ovary in front of testis, neither 

 testis nor ovary lobed; cirrus relatively large, spinose; seminal vesicle 

 inclosed in cirrus-pouch ; folds of uterus mainly in the posterior part of 

 the body behind testis; metraterm ample, muscular, joining cirrus at or 

 in front of ventral (genital) sucker. 



Genolopa ampullacea gen. et sp. nov. (Fig. 213.) 



Monostomum sp. from Hamilton ftavolineatus and Bathystoma striatum Ber- 

 muda. Proc. U. S. Nat. Mus., xxxin, pp. 118-119, plate xiv, figs. 92, 93. 



Shape very variable, long oval, fusiform, vase-shape. The anterior 

 end of specimens which have been compressed is usually broad, making 

 the outline ovate, the broad end being anterior. In some uncompressed 

 individuals there is a decided narrowing of the anterior end into an 

 abruptly tapering neck. The body is covered with minute spines. The 

 transverse diameter of the oral sucker is approximately one-fourth 

 greater than that of the genital sucker, The latter is sometimes rather 

 faint, so that measurements made on the living specimens are often too 

 small. The pharynx is close to the oral sucker in specimens which have 

 been compressed; in others there is a short prepharynx. The pharynx 

 is longer than broad and there is a short esophagus. The rami of the 

 intestines were indistinct beyond the middle of the body, but they extend 

 to the posterior end. The genital sucker is not far from the anterior 

 third and on the median line. The spinose cirrus curves around the 



