Jobnson jfun^ 



NEW MONOGENETIC TREMATODES FROM MARINE 



FISHES 



By EMMETT W. PRICE 

 Zoological Division, Bureau of Animal Industry, U.S. Department of 



Agriculture 



(With One Plate) 



Among the several lots of monogenetic trematodes collected from 

 marine fishes by the first Johnson-Smithsonian Deep-Sea Expedition 

 were two species which appear to be new ; these are described below. 



Family CAPSALIDAE 



Subfamily Benedeniinae 



ANCYROCOTYLE BARTSCHI, n. sp.' 



Plate I, figs. I, 2 



Description. — Body elongate, rectangular, 826 to 970 [x long by 255 

 to 270 [x wide (immature specimens). Anterior haptors or attaching 

 organs suckerlike, 80 /a in diameter, situated toward posterior ends of 

 fleshy pads. Posterior haptor suckerlike, subsessile, surrounded by nar- 

 row, delicate, marginal membrane, armed with three pairs of hooks and 

 14 marginal booklets. Hooks of first pair straight, 20 to 23 fi long, 

 directed forward and outward ; hooks of second pair strongly re- 

 curved, immediately ])osterior to those of first pair, 68 to y6 /jl long 

 from proximal end to height of curve, directed backward and out- 

 ward, tips directed forward ; hooks of third pair relatively broad and 

 flat, lateral to hooks of second pair, 25 to 28 /i. long, tips slender and 

 recurved ; marginal booklets 10 /a long. Oral aperture somewhat tri- 

 angular, about 150 ju. from anterior end of body ; pharynx subglobular, 

 100 /x long by 120 ju. wide ; esophagus very short or absent ; intestinal 

 branches simple, without lateral or median diverticula, not united 

 posteriorly. Common genital aperture sinistral, at level of equator of 

 pharynx. Cirrus pouch 160 fi long by 40 fi wide, its base posterior to 

 pharynx and slightly to right of median line. Testes elongate oval, 

 180 fi long by 80 fj. wide, equatorial. Ovary oval, immediately pre- 



^ Named in honor of Dr. Paul Bartsch, director of the expedition. 

 Smithsonian Miscellaneous Collections, Vol. 91, No. 18 



