A manual of the Mollusca, or, A rudimentary treatise of recent and fossil shells . ?^^^ ^^x^ Fig. 80.* Distr., 3 sp. Labrador, Norway, Brit., Medit. W. Africa. Range,—100 fms. Fossil; see Pteroceras and Rosiellaria; above 200 species, ranging fromthe lias to the chalk, probably belong to this genus, or to genera not yetconstituted. Struthiolakia, Lam. Etijm., struthio, an ostrich (-foot), from the form of its aperture. Type, S. straminea, PL IV., fig. 6. Shell tun-eted; whirls angular; aperture truncated in front; columellavery oblique; outer lip prominent in the middle, reflected and thickene
A manual of the Mollusca, or, A rudimentary treatise of recent and fossil shells . ?^^^ ^^x^ Fig. 80.* Distr., 3 sp. Labrador, Norway, Brit., Medit. W. Africa. Range,—100 fms. Fossil; see Pteroceras and Rosiellaria; above 200 species, ranging fromthe lias to the chalk, probably belong to this genus, or to genera not yetconstituted. Struthiolakia, Lam. Etijm., struthio, an ostrich (-foot), from the form of its aperture. Type, S. straminea, PL IV., fig. 6. Shell tun-eted; whirls angular; aperture truncated in front; columellavery oblique; outer lip prominent in the middle, reflected and thickened inthe adult; inner lip callous, expanded; operculum claw-shaped, curved in-waids, with a projection from the outer, concave edge. Animal with an elongated muzzle ? tentacles cylindrical; eye-pedicelsshort, adnate with the tentacles, externally; foot broad and (Kiener.) Distr., 5 sp. Australia and New Zealand; where alone it occurs sub- FAMILY IV. IMelaniad^. Shell spiral, turreted; mth a thick, dark epidermis; apertme oftenchannelled, or notched in fr-ont; outer l
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmollusks, bookyear185
