Marketable mussels Mytilus qalloprovlncla0's traded with commercial certification from production sltes in Italy and abroad (France, Spain) were exarnlned for the presence of A4ytrllcola intestinalls (Copepoda. Mytllicolidae) and Urastoma cyprlnae (Turbellana Hypotrichlnidae) from October 1994 to February 1996. The prevalence of M. intestlnahs was 4 1 % and 4.7% respectively In mussels from Lerici (La S p e z~a ) and S Pietro in Volta (Venice), whereas ~t rose to 57.9% in the samples from Spain. A4. intestinalis was absent In mussels from C h i o g g~a (Venlce). Ganzlrn (Messina), Taranto, Tneste and France. The prevalence of U cyprinae vaned considerably, ranging from 0 . 3 Y in mussels from Trani (Bari) to 33 2 % and 86.3% respectively in those from Chioggia and Tr~este. It was 85 7 "h in samples from France and 63.7 ";P in those from Spain KEY WORDS-Mytilus galloprovinclaljs . Mytlllcola ~ntestinalis . UI-astoma cyprinae . Paras~tology Epidemiology
Nematodes identified as Spirura rytipleurites seurati are described and illustrated by light and scanning electron microscopy from specimens collected from the stomach of hedgehogs (Erinaceus europaeus) in Sicily. They differ from S. auriti, a stomach parasite of Hemiechinus auritus, in the length of body, the position of the second pair of post-cloacal papillae in the male and the structure of the spicules. The nematodes are classified as S. rytipleurites seurati, a stomach parasite of Erinaceus algirus, but they differ slightly from it in the dimensions of the eggs, that we measured in the uterus, and in the shape of the amphids. This appears to be the first report of S. rytipleurites seurati from Italy and from E. europaeus.
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