no. 1817. .1 yEW TREMATODE—GOLDBERGER. 239 



Specific diagnosis. — Dorso-ventrally flattened, oval distomes with 

 bluntly pointed oral and rounded caudal margin, 3.8 to 4.88 mm. 

 long by 1.72 to 2.92 mm. wide. Cuticle 4/j. thick, armed with deli- 

 cate spines which are few or absent at caudal pole; acetabulum at 

 junction of cephalic and middle third of body; genital pore the 

 length of acetabular diameter preacetabular, submedian. Oral 

 aperture ventro - terminal, larger than acetabular aperture; oral 

 sucker larger than acetabulum ; pharynx present with prepharyngeal 

 atrium; esophagus short, forks just cephalad of level of genital 

 pore; ceca terminate at level of junction of penultimate with caudal 

 fifth of body length. 



Testes irregularly globular, smooth, equal, right and left, pre- 

 equatorial, postacetabular, in intercecal area; testicular zones over- 

 lap, fields are separate. Cirrus pouch present, dorso-cephalad of 

 acetabulum; incloses a vesicula, a short prostatica and a protrusile 

 cirrus. 



Ovary is globular, smooth, smaller than acetabulum or testis, 

 submedian; ovarian zone abuts or overlaps caudal limit of ace- 

 tabular zone. Laurer's canal present, but terminates in a blind 

 globular end. Receptaculum seminis present, large. Uterus with 

 descending and ascending limb in separate, right and left, adjacent 

 fields, extends to near caudal margin, intercecal. Vitellaria ventro- 

 lateral of ceca; follicles in groups extend from slightly caudad of 

 cephalic margin of acetabulum to plane of caudal margin of caudal 

 testis. Excretory bladder roomy, Y shaped. Excretory pore dorso- 

 subterminal. 



Habitat. — Liver of Bascanion constrictor, Virginia, U. S. A. 



Type.— Cut. No. 7326, U.S.N.M.; cotypes No. 5863 and No. 7112. 



REFERENCES. 



Braun, 1892. — Vermes, Bronn's Klass. u. Ordnung. d. Thier-Reichs. Leipzig, vol. 4, 



Abth. la; Lief. 21-23, pp. 715-716. 

 Goldberger and Crane, 1911. — A new species of Athesmia from a monkey. Bull. 



No. 71, Hyg. Lab. U. S. Publ. Health & Mar.-Hosp. Serv., Washington. 

 Looss, 1902. — Ueber neue und bekannte trematoden aus Seeschildkroten. Zool, 



Jahrb., Jena, Abth. f. Syst., vol. 5, pp. 411-894. 

 Stafford, 1896. — Anatomical structure of Aspidogastcr conchicola. Diss. (Leipzig. 

 Voeltzkov, 1888. — Aspidogastcr conchicola. Arb. a. d. zoolzootom. Inst, in Wurz 



burg, Wiesbaden, vol. 8, pp. 249-289. 



Bibliographic citations are from Stiles and Hassall's Index Cata 

 logue of Medical and Veterinary Zoology (Authors: Bull. 39, Bureau 

 of Animal Industry; Trematoda: Bull. 37. Hygienic Laboratory, 

 U. S. Pub. Health & Marine-Hosp. Serv., Washington, D. C). 



