. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. CCELENTERATA : HYDROZOA. 99 colour and semi-transparent, and it floats at the surface of the sea, with its vertical crest exposed to the wind as a saiL. Fig. 20.—Physopkorida. a Portuguese man-of-war (/'^^ja/w f<^rtV7//«f), showing the fusiform float and the polypites and tentacles (after Huxley); b VeUUa vulgaris (after Gosse). Divisions of the Physophoeid^.—(After Huxley.) Fam. I. Apolemiadce.—Hydrosoma with nectocalyces and hydrophyllia, the latter united with the other org
. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. CCELENTERATA : HYDROZOA. 99 colour and semi-transparent, and it floats at the surface of the sea, with its vertical crest exposed to the wind as a saiL. Fig. 20.—Physopkorida. a Portuguese man-of-war (/'^^ja/w f<^rtV7//«f), showing the fusiform float and the polypites and tentacles (after Huxley); b VeUUa vulgaris (after Gosse). Divisions of the Physophoeid^.—(After Huxley.) Fam. I. Apolemiadce.—Hydrosoma with nectocalyces and hydrophyllia, the latter united with the other organs into groups which are arranged at considerable intervals along the ccenosarc. Coenosarc filiform. Pneuma- tocyst small. Fam. II. StephanomiadiF.—Hydrosoma with nectocalyces and hydro- phyllia, the latter arranged with the other organs in a continuous series. Coenosarc filiform. Pneumatocyst small. Fam. HI. Physophoriadce.—Hydrosoma with nectocalyces, but without hydrophyllia. Distal end of the filiform ccenosarc dilated. Pneumatocyst small. Fam. IV. Athorybida. — Hydrosoma without nectocalyces, but with hydrophyllia. Pneumatocyst occupying almost the whole of the globular coenosarc. Fam. V. Rhizophysiadce. — Hydrosoma without either nectocalyces or hydrophyllia. Coenosarc filiform. Pneumatocyst small. 6. 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 Nicholson, Henry Alleyne, 1844-1899. New York : D. Appleton
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