. The Canadian field-naturalist. 560 The Canadian Field-Naturalist Vol. 113. Figure 1. Map showing collection localities. Numbers correspond to localities, as listed in the Appendix. initial introduction and further transport of exotic snails is likely primarily with plants and plant material. Materials and Methods Collections were made throughout British Columbia since 1989. The majority of collections yielding introduced land snails were made in Greater Vancouver and east up the lower Eraser River valley, or in Greater Victoria on Vancouver Island. Speci- mens were collected by hand picking
. The Canadian field-naturalist. 560 The Canadian Field-Naturalist Vol. 113. Figure 1. Map showing collection localities. Numbers correspond to localities, as listed in the Appendix. initial introduction and further transport of exotic snails is likely primarily with plants and plant material. Materials and Methods Collections were made throughout British Columbia since 1989. The majority of collections yielding introduced land snails were made in Greater Vancouver and east up the lower Eraser River valley, or in Greater Victoria on Vancouver Island. Speci- mens were collected by hand picking from leaf litter, in grass or other vegetation, or the undersides of (and ground beneath) rocks and wood, and samples were not made for quantitative analysis. Localities (Figure 1) are documented in the appendix and cited in the text by corresponding number. Some localities were visited more than once. While most material was preserved dry, a limited number of specimens were drowned in water overnight then preserved in 70% ethanol. Voucher specimens consisting of all ethanol-preserved and some dry material are deposited in Royal British Columbia Museum (RBCM), Victoria (Table 1). Additional dry material is in the personal collection of the author. The RBCM was also checked for addi- tional records, which are documented under the appropriate species. Identifications were made using the publications by Pilsbry (1936-1948), Adam (1960), Kerney and Cameron (1979) and Gerber (1996). The descrip- tions and figures of Kerney and Cameron (1979) and the key and descriptions of Adam (1960) were most helpful in distinguishing species of glass-snails, genus Oxychilus, which are best identified by observing pigmentation and odour of living animals. Live Oxychilus were obtained whenever possible. Comparison was made with Oxychilus species col- lected in Britain by J. Hutchinson and H. Reise. Species List Lauria cylindracea (da Costa, 1776) The Chrysalis Snail, Lauria cylindracea, is native t
Size: 1980px × 1262px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1910, bookyear1919
