Separation of Disparalona leei (Chien, 1970) in North America from D. rostrata (Koch, 1841) in Europe (Cladocera, Chydoridae) R. George MichaelDavid G. Frey OriginalPaper Pages: 81 - 108
Descriptions of unionicolid larvae from three North American unionid bivalves R. K. H. JonesR. A. Baker OriginalPaper Pages: 109 - 113
Effects of low-pH stress on the morphology and activity of bacteria from lakes receiving acid precipitation Salem S. RaoDina PaoliniGarry G. Leppard OriginalPaper Pages: 115 - 121
Two new and three redescribed species of Viscosia (Nematoda, Oncholaimidae) N. SmolJ. Sharma OriginalPaper Pages: 123 - 147
The undescribed female of Pseudostenhelia secunda Wells, 1971 (Copepoda Harpacticoida) and keys to the genus Y. Ranga Reddy OriginalPaper Pages: 149 - 156