NO. 6 NEW TREMATODE PARASITES PRICE 5 



120 /x wide; posterior testis about i6o /x in diameter. Ovary snb- 

 globular, lOO to 140 fx, long by 100 to 120 /u. wide, situated between 

 testes, either to right or left depending largely upon position of cirrus 

 pouch. Vitellaria consisting of large follicles forming an almost com- 

 plete circle around adhesive organ. Uterus completely covered by 

 adhesive organ and containing 16 to 60 eggs ; vaginal sphincter well 

 develojjed. 80 to 120 /x in diameter. Eggs oval, 44 to 48 /j. long by 

 32 to 36 fi. wide. 



I/osf. — Srda leucogastro. 



Location. — Small and large intestine. 



Type locality. — Fajardo Roads, between Palominos Island and 

 [•"ajardo, Puerto Rico. 



Type specimen. — U.S.N.M. Helm. Coll. no. 8696; paratypes 

 no. 8697. 



PROHEMISTOMUM APPENDICULATOIDES, n. sp. 



Plate I, fig. 7 



Description. — Body scoop-shaped, 680 to 970 /u, long, divided into 

 a widened anterior part 510 to 850 jx long by 240 to 369 fi wide, and 

 a conical posterior part. Oral sucker subterminal, 40 to 48 /x in diam- 

 eter ; acetabulum 20 to 28 /x in diameter ; adhesive organ prominent, 

 160 to 200 /x long by 100 to 180 /a wide, with a deep central depression. 

 I'harynx 28 to 32 /j. long by 20 to 32 j.l wide : esophagus 42 to 120 /x 

 long ; intestinal ceca slender, terminating at or near junction of an- 

 terior and ])()sterior parts of body. Genital aperture at posterior end 

 of body, subterminal and directed dorsally : genital sinus spacious. 

 Cirrus ]:)ouch 280 to 360 /j. long by 50 to 85 /x, wide, extending to right 

 or left around testes and ovary, its base reaching level of anterior 

 margin of anterior testis ; it contains a small seminal vesicle, long pars 

 prostatica and cirrus. Testes globular to oval, with zones separated 

 and fields partly coinciding ; anterior testis 80 to 100 /x long by 60 to 

 80 fji wide; posterior testis 100 to ijo /x long by 70 to 80 fj. wide. 

 OA-ary globular, about 40 /x in diameter, situated between testes. Vitel- 

 laria well developed, forming an almost complete circle around base 

 of adhesive organ. Uterus short and containing from two to four 

 eggs ; vaginal sphincter moderately developed. F,ggs oval. 80 to i 12 j(t 

 long by 60 to 80 /i. wide. 



Host. — Pelecaniis occidenlalis occ I den talis. 



Location. — Small intestine. 



Type locality. — Levantade Keys, Samana Pay, Dominican Reixil)lic. 



L^ype specimen. — U.S.X.M. Helm. Coll. no. 870T ; paratypes 

 no. 8702. 



