. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 24S Fig. l^T.âII,n!ttemma tergcsir, S. Nectocalyx; P, polyp; Pn, pneumatnphore; aydroplij-llium ; J^7câ , { provisional appendages is formed which allows us to regard the develop- ment of the Siphono' phora asa metamoi-phosis (lig. 188 and 189). The croAvn of hydro- phyllia, which is com- pleted by the addition of fresh hydrophyllia after the appearance of a tentacle with provisional groups of nematocysts, persists only in Atliory- hia, where a swimming column with nectocalyces is ne
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 24S Fig. l^T.âII,n!ttemma tergcsir, S. Nectocalyx; P, polyp; Pn, pneumatnphore; aydroplij-llium ; J^7câ , { provisional appendages is formed which allows us to regard the develop- ment of the Siphono' phora asa metamoi-phosis (lig. 188 and 189). The croAvn of hydro- phyllia, which is com- pleted by the addition of fresh hydrophyllia after the appearance of a tentacle with provisional groups of nematocysts, persists only in Atliory- hia, where a swimming column with nectocalyces is never formed. In A(jalmoj)sis and Thysophora the primary hydrophyllia of the larva fall off as the stem be- comes larger, and are replaced by nectocalyces. (1) Sub-order: Fhyso- plioridce. Stem short, extended in the form of a sac (fig. 190), or elongated spirally (fig. 191), with a pneumato- phore, usually nectocaly- ces, which are arranged in two or more rows on a swimming column below the pneumatophore. Hydrophyllia and dacty- lozooids are usually , and alternate with the polyps and gonoph(;res in regular order. The body of the larva usually develops voups of 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 Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
Size: 908px × 2750px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
