A treatise on malacology; or, Shells and shell fish . d marked with a few oblique plaits;the aperture wide, the base effuse. Lamarckii. ii. 1. maculosa. lb. 78. f. lb. 78. f. 2. ? striata. lb. pi. 40. f. 2. Sw.* (fig. 87- e.) Oliviform; spire (typically)rather produced; the tip acute ; inner lip not thick-ened ; outer lip straight; base of the pillar curved in-wards, and marked by two strong plaits ; upper plaitsobsolete or wanting; aperture effused at the base only. biplicata. Tank. Cat. 2332. eburnea. Zool. 111. ii. 58. f. Zl. 111. 58. f
A treatise on malacology; or, Shells and shell fish . d marked with a few oblique plaits;the aperture wide, the base effuse. Lamarckii. ii. 1. maculosa. lb. 78. f. lb. 78. f. 2. ? striata. lb. pi. 40. f. 2. Sw.* (fig. 87- e.) Oliviform; spire (typically)rather produced; the tip acute ; inner lip not thick-ened ; outer lip straight; base of the pillar curved in-wards, and marked by two strong plaits ; upper plaitsobsolete or wanting; aperture effused at the base only. biplicata. Tank. Cat. 2332. eburnea. Zool. 111. ii. 58. f. Zl. 111. 58. f, 1. conoidalis La7n. No. Sai/. oryza Lam. No. 62. SuB-FAM. 4. ANCILLARINiE. Shell oliviform, highly polished ; aperture very effuse ;suture concealed by enamel; base with one or two * The union of the VolutidcB and the TtcrbinellidiB is so intimatelyeffected by Oliiclla biplicnla and Pseudoltvn plumhea {see Jig. 3. p. Si?.), thatthe two plaits on the pillar of the former shell alone separate the twofamilies. PART II. MARGINELLINiE. 323. strong grooves, which form a little toothat the edge of the outer lip; inner lipwanting; base of the pillar thick, vitreous,obliquely striated, and turned outwards. Ancillaria Lam. The characters, atpresent, are those of the sub-family, asthe genera have not been worked glabrata Sw. {fig. 88.) SuB-FAM. 5. MARGINELLIN^E. Shell small; oval; spire short or concealed; outer lip,and often the inner, very much thickened and inflexed,with the inner margin tcrenated; pillar with distinctplaits ; the base with a wdde, but not a deeply cleftnotch. VoLUTELLA Sw, BulHform ; ovate oblong;spire either entirely or almost concealed ;pillar with four oblique plaits at thebase ; aperture not striated; outer lipsmooth, thickened; inner lip w^anting. {fig- m V. bullata. Chemn. f. , Zool. 111. ii. pi. 44. f. 1guttata. lb. £ 2. Persicola Schiim. General form of Volutella; butthe spire always concealed ; plaitsnumerous,and ex
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
