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Show 1884.] 'LIGHTNING'AND'PORCUPINE'EXPEDITIONS. 123 Dr. Kobelt and M. Crosse have objected to the specific name wyville-thomsoni as contravening the laws of Linnean nomenclature. But the name is really one and single, although compound and apparently double. The patronymic name Thomson and many others in England are so very common that the bearers of it are obliged to annex the second baptismal name by way of distinction. My own name by the bye is also a case in point. Linne himself frequently used compound names for Testacea, viz.: pes-pelecani, pes-lutra, caput-serpentis, crista-galli, stercus-muscarum, Mida, Auris-Juda?, Auris-Diana, Tectum-persicum, oculus-cornu-militare, and Cornu-arietis. Here are a dozen such instances of Linnean names. 30. RISSOA STEFANISI \ Jeffreys. B. costulata, S. Wood, Crag Moll. i. p. 106, t. xi. f. 12, a, b. B. stefanisi, B. C. v. p. 208. Distribution. Throughout the Mediterranean, in few localities and sparingly; 40-600 fms. Fossil. Pliocene: Red and Coralline Crag, Belgian Crag, and Biot. I cannot agree with Monterosato that this is tbe same species as Actaon pygmaa of Grateloup, a Miocene fossil of the Bordeaux Basin, nor with Van den Broeck that it belongs to the Pyramidellida. The apex is not heterostrophe or sinistral, although intorted ; the peristome is continuous ; and the pillar has no tooth or fold, only a slight thickening. When I suggested the name stefanisi instead of costulata, I was under the impression that Alder's name costulata, being older than that of Wood, must be preferred to the latter. But I now believe that Alder's species is merely a variety of B. similis, and that Risso's R. costulata may be identical with R. variabilis of v. Miihlfeld. that case Wood's name might stand. However, " Confusion's cure lives not In this confusion."-SHAKESPEARE. D. CINGULA. Spirally striated or smooth; outer lip plain-edged. 31. RISSOA STRIATA, Adams. Turbo striatus, Ad. in Tr. Linn. Soc. iii. p. 66, t. xiii. f. 25, 26. R. striata, B. C. iv. p. 37 ; v. p. 208, pi. Iviii. f. 2. 'Lightning' Exp. St. 2, 4, 5. ' Porcupine' Exp. 1869 : St. 19. 1870 : Atl. Vigo B. Distribution. From the arctic and northern seas in both hemispheres to the iEgean and Teneriffe on one side, and Little Gull Island in New York and Jamaica on the other side ; 0-96 fms. The American and arctic form is Cingula aculeus, Gould (1841) =R. saxatilis, Moller (1842) = i?. arctica, Loven (1846). This 1 Named in honour of the late General de Stefanis of Naples, who was an assiduous conchologist, and made an extensive collection of shells from that part of the Mediterranean. He rendered m e much kind assistance. |