Jacob H. Fischthal

Acolpenteron ureteroecetes Fischthal and Allison, 1940, a Monogenetic Trematode from the Ureters of the Black Basses, with a Revision of the Family Calceostomatidae (Gyrodactyloidea)

Acolpenteron ureteroecetes, a monogenetic trematode belonging to the superfamily GYRODACTYLOIDEA, was first discovered by one of us (Fischthal) in the fall of 1939 in the ureters and urinary bladder of the large-mouthed bass, Huro salmoides (Lacepede). Since many parasites are common to both this species and the northern small-mouthed bass, Micropterus dolomieu doloTnieu Lacepede, the latter were examined for this trematode and some were found to be infected.

Three new species of Phyllodistomum (Trematoda :. Gorgoderidae) from Michigan fishes.

Examination of the fishes of Honey Creek near Ann Arbor, Michigan, during the spring of 1941 for trematodes of the genus Phyllodistomuml Braun, 1899, revealed the presence of three new species occurring in the ureters and urinary bladders of the northern creek chub, Semotilus atromaculatlls atroliiaculatus (Mitchill), the Mississippi Valley common shiner, Notropis cornuitus chrysocephalus (Rafinesque), and the hornyheaded chub, Nocomis biguttatus (Kirtland). These are described as follows:

Triganodistomum hypentelii n. sp. (Trematoda: Lissorchiidae) from the hog sucker, Hypentelium nigricans (Le Sueur).

Examination of the small intestine of a hog sucker, Hypentelium nigricans (LeSueur)2 collected on April 3, 1941, from the Saline River near Milan, Monroe County, Michigan, revealed three specimens of a new species of trematode belonging to the genus Triganodistomum Simer, 1929. In the fall of 1941, two of nine hog suckers taken from the Saline River near Saline, Washtenaw County, Michigan, contained three and four adult trematodes respectively. The following description is based upon the study of living specimens, and of whole mounts and transverse sections of specimens fixed in hot Bouins fluid, stained in Mayers paracarmine (whole mounts) or Ehrlichs acid haematoxylin (sections), and mounted in clarite X (Nevillite no. 1).