Lake Musconetcong, located in the northwest comer of Morris County, New Jersey, was created by damming the overflow from Lake Hopatcong to the north. An investigation into deaths of the mute swan, Cygnus olor, on Lake Musconetcong was begun in the fall of 1977. The deaths were caused by hemorrhagic ulcerative enteritis produced by the trematode Sphaeridiotrema globulus and reported by Roscoe and Huffman (1981, Av. Dis. In press). The acute nature of the disease suggested that the infection was acquired at the lake. Snails serve as first and second intermediate hosts of S. globulus. In the summer of 1981 numerous species of Helisoma trivolvis, Physa sp., Viviparus malleatus, Campeloma decisum, and Goniobasis virginica were crushed and examined for trematodes. Only G. virginica contained larval stages of S. globulus. This note reports the occurrence of S. globulus and other trematodes from G. virginica in New Jersey. In our study 2,593 G. virginica ranging in length from 11 to 29 mm were examined and five species of trematodes were found. Infection data are as follows: 3 (0.1%) infected with mature adults of Aspidogaster conchicola; 11 (0.4%) with rediae and cercariae of Philophthalmus megalurus; 117 (4.5%) with rediae and cercariae of S. globulus; 1,244 (47.9%) with encysted metacercariae of S. globulus; 69 (2.6%) with sporocysts and virgulate cercariae of a lecithodendriid and 297 (11.4%) with microphallid sporocysts and cercariae of the ubiquita type. Macy and Ford (1964, J. Parasitol. 50: 93) reported metacercariae of S. globulus from Flumenicola virens in Portland, Oregon. Szidat (1937, Z. Parasitenkd. 9: 529-542) described larvae of S. globulus from Bithynia tentaculata at Rossitten, East Prussia. Campbell and Jackson (1977, Aust. Vet. J. 53: 29-31) reported encysted metacercariae of S. globulus from Gabbia australis and from an unidentified planorbid snail. In Italy, Francalanci and Manfredini (1969, Clinica Vet. Milano 92: 339-345) experimentally infected Lymnaea palustris, L. auricularia, Physa acuta, Planorbis planorbis, Planorbis corneus, and Vivipara fasciata with S. globulus cercariae. G. virginica is a new host record for S. globulus. Larval stages of Philophthalmus megalurus (Cort, 1914) have been reported by McMillan and Macy (1972, J. Parasitol. 58: 22) in Oxytrema silicula from Oregon. Records of P. megalurus include infected Pleurocera acuta from Indiana and from G. livescens in Ohio (Nollen et al., 1975, Int. J. Parasitol. 5: 99-101). Goniobasis virginica is a new host record for this species in New Jersey. Previously recorded snail hosts for Aspidogaster conchicola include Paludina decisa from Pennsylvania by Leidy (1904, Smithson. Misc. Pub. 46: 148); from Viviparus lapillorum and V. catayensis in China (Faust, 1922, Tr. Am. Micr. Soc. 41: 113-117); V. malleatus and V. japonicum in Massachusetts (Michelson, 1970, J. Parasitol. 56: 709-712); and from G. livescens in northern Ohio by Huehner and Etges (1971, J. Parasitol. 57: 1255). The finding of A. conchicola in G. virginica represents a new record for a gastropod host. We thank Dr. Joseph Rosewater, Curator, Department of Invertebrate Zoology (Mollusks), Smithsonian Institution for identification of snails. This research was supported by a grant-in-aid from the Society of the Sigma Xi.