. The Canadian naturalist and geologist. Natural history -- Periodicals. 28 Post-Pliocene Deposits of the St. Laivrence. 3. Polymorphina lactea (Figs. 2, 3, also pnper in Canad. Nat vol 2). This is perhaps the second species in relative importance though much less plentiful than Polystomella umbilicatula. The greater number of the specimens belong to the variety "typica" of Williamson (F<g. 2). Others appear to be an exaggerated form of the variety "oblonga* (Fig. 3), and many others, espe- cially the smaller examples, are of the variety li communis.'''1 A similar range of va
. The Canadian naturalist and geologist. Natural history -- Periodicals. 28 Post-Pliocene Deposits of the St. Laivrence. 3. Polymorphina lactea (Figs. 2, 3, also pnper in Canad. Nat vol 2). This is perhaps the second species in relative importance though much less plentiful than Polystomella umbilicatula. The greater number of the specimens belong to the variety "typica" of Williamson (F<g. 2). Others appear to be an exaggerated form of the variety "oblonga* (Fig. 3), and many others, espe- cially the smaller examples, are of the variety li communis.'''1 A similar range of vari ties exists in the modern specimens from Gaspe. Size -fa to T\. Localities.—Logan's farm ; Tanneries; recent in Fig. 2 Fig. 3. 4. M'diolina seminulum (Lin.)—(For figure, see paper in Can^ Nat. Vol. 2, Fig. 18.) In my paper of last year this species was noticed as QuinquelocuUna occidentalism Bailey ; and I still be- lieve it to be identical with the shell so named ; but I presume that it, as well as many other supposed species of the genus QuinquelocuUna of D'Orbigny, must be included in Miliulina Seminulum, as extended by Williamson. This shell is not in- frequent in the -clays at Montreal, and it, also occurs in Gaspe Bay. It approaches very nearly to the typical form of the spe- cies, but is usually of small size, not exceeding ^jth of an inch in length. Locality.—Logan's Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal, Dawson
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