. Natural history of animals;. Zoology. 222 MOLLUSKS: HETEROl'ODS AND PTEROPODS. in an aquarium, where they are also very useful, devour, ing the green confervje that grow on the glass. Fig. 416. — Heli- ^^^1 Fig. 418.— cina. U. States. ^ Acicula. Fig. 417.— Great Fig. 419 — Clyclostoma. Britain. Tornatella. United States. Great Britain Fig. 420. — Bul- la. U. States. Sea Slugs. These have no shells, and many of them only slightly resemble the Gastropods before described. See Fig- ures Fig. 422. — Doris. Great Britain. Fig. 423. — Elysia. Fig. 424. — At- Great Britain. lanta. South A
. Natural history of animals;. Zoology. 222 MOLLUSKS: HETEROl'ODS AND PTEROPODS. in an aquarium, where they are also very useful, devour, ing the green confervje that grow on the glass. Fig. 416. — Heli- ^^^1 Fig. 418.— cina. U. States. ^ Acicula. Fig. 417.— Great Fig. 419 — Clyclostoma. Britain. Tornatella. United States. Great Britain Fig. 420. — Bul- la. U. States. Sea Slugs. These have no shells, and many of them only slightly resemble the Gastropods before described. See Fig- ures Fig. 422. — Doris. Great Britain. Fig. 423. — Elysia. Fig. 424. — At- Great Britain. lanta. South Atlantic. Fig. 421. — Eolis. Fig. 425. — Tritonia. Great Britain. Great Britain. HETEROPODS AND PTEROPODS. These live in the open sea. Some of them move in immense swarms, miles in extent. Figures 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 Tenney, Sanborn, 1827-1877; Tenney, Abby Amy Gove, 1836-. New York, Cincinnati [etc. ] American book Co
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
