Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 420 MOLLUSC A : ACEPHALA. tightly shut by one or two strong muscles called adductors (Fig. 620, «, a'). When the animal relaxes these muscles FIG. 619. f S An Acephal—Clam. Mya truncata, L. Reduced one-halt'. rs, respiratory tube or siphon ; the water flows into the branchial chamber, through this tube, aud out through the excurreat siphon «s. FIG. 620. I u Dorsal margin. Anterior aide.

---

Size: 2692px × 743px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage