. A text-book of agricultural zoology. Zoology, Economic. FlG. 137.—Two TEANS- VEESE SEEIES OF TEETH FEOM nADUr,A OF LIM- PET. Much enlaj^gad. (Brit. Mus. Guide.). Fig. 138.—Shells of Lamellibbanchs. 1, Cyclas, with two muscle scars (h b) and entire pallial line (a); 2, Tapes, with in- dented pallial line (c); 3, Pema, with one muscle scar and complete pallial line (a). (Nicholson.) tinguished as siphonate forms. Those that have no pallial sinus are asiphonate forms (fig. 138, 3). The foot is generally a large, wedge-shaped, muscular body. Most are marine, but some—such as Unio and Anodonta, F

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. A text-book of agricultural zoology. Zoology, Economic. FlG. 137.—Two TEANS- VEESE SEEIES OF TEETH FEOM nADUr,A OF LIM- PET. Much enlaj^gad. (Brit. Mus. Guide.). Fig. 138.—Shells of Lamellibbanchs. 1, Cyclas, with two muscle scars (h b) and entire pallial line (a); 2, Tapes, with in- dented pallial line (c); 3, Pema, with one muscle scar and complete pallial line (a). (Nicholson.) tinguished as siphonate forms. Those that have no pallial sinus are asiphonate forms (fig. 138, 3). The foot is generally a large, wedge-shaped, muscular body. Most are marine, but some—such as Unio and Anodonta, Fresh-water Mussels—live in our rivers and ponds. To this class Oysters (Ostrea), Mussels {Mytilus), &c., 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899