Catalogue of the Australian Hydroid Zoophytes

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T. Richards, Government Printer, 1884 - Athecate hydroids - 198 pages
 

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Page 51 - Sponge or coral, dichotomously branched, expanded, growing as a large tuft from a broad, tortuous, creeping base, of a dark brown colour, and uniform hard, rigid substance. Stem, hard, cylindrical, opaque, smooth ; branches and branchlets tapering to a point, cylindrical, covered with tufts of projecting horny spines on every side, those on the branches often placed in sharpedged, narrow, transverse ridges ; those of the upper branches and branchlets close, but isolated, and divergent from the surface...
Page 63 - Eucopellinœ, in which the medusa has no digestive organs, and lives only a short time after its escape from the gonophore. Only one species, Eucopella campanularia, is known, and this is found in Australia. The larva is a campanularian whose hydranths are carried upon short, unbranched stems, which spring from a creeping root. The medusa has a veil, well-developed marginal sense-organs, radial and circular chymiferous tubes, and large reproductive organs, but it has no mouth, stomach, or tentacles....
Page 48 - Polypides claviform, sessile, with a single verticil of filiform tentacles round the base of a conical proboscis, borne on an expanded and continuous crust; the coenosarc naked above.
Page 37 - Essay towards a Natural History of the Corallines found on the Coast of Great Britain and Ireland,
Page 106 - Hydrothecae perfectly sessile, more or less inserted in the stem and branches ; polypites wholly retractile with a single wreath of filiform tentacles round a conical proboscis ; gonozooids always fixed.
Page 104 - The cells are distichous, and of a very peculiar form, varying in some degree according to situation. The younger (?) cells on the secondary branches are flat on the inferior or outer aspect, with two angles on each side, or are quadrangular ; whilst the cells on the stems or older or fertile branches are usually rounded below, or on the outer side, and thus have only one angle on each side. The mouth varies in shape according to the cell ; in the former case being a regular long rectangle ; in the...
Page 60 - Stem branching, plant-like, rooted by a creeping stolon ; hydroihecce campanulate, without operculum ; gonothecce borne on the stem and branches ; reproduction by free medusiform zooids. Gonozooid : Umbrella (at the time of liberation) , depressed and disk-like; manubrium short and quadrate; radiating canals, 4; marginal tentacles numerous (increasing in number with age), prolonged at the base and projecting inwards ; lithocysts, 8, 2 in each interradial space, borne on the inner side of 8 of the...
Page 46 - Gonophorcs phanerocodonic, borne on the body of the polypite at the proximal side of the tentacular verticil. Medusa at the time of liberation deep bell-shaped ; manubrium not reaching the orifice of the bell, and having its mouth surrounded by four short tentacles...
Page 152 - Eostrum not continued to the rachis, adnate the whole length of the cell, wide and projecting, narrowed to the point, which is tubular ; opening oblique ; longer than the cell ; lateral processes conical, short, tubular, closely adnate. Costae of ovarian receptacle with short, opposite, tubular 'branches, not connected by a membrane. Hob. — Swan Id., Banks
Page 110 - Hydrocaulus simple, divided by twisted joints into internodes, each bearing a hydrotheca on its upper end.

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