A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . appears undesirable. As seen under the high magnification of six or eighthundred diameters, the cuticular surface is shown to be finely striate transversely,but it does not exhibit such character with one of two or three hundred only,which is employed for establishing that distinction between the smooth and con-spicuously striate types here adopted as an aid to their specific identificatio
A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . appears undesirable. As seen under the high magnification of six or eighthundred diameters, the cuticular surface is shown to be finely striate transversely,but it does not exhibit such character with one of two or three hundred only,which is employed for establishing that distinction between the smooth and con-spicuously striate types here adopted as an aid to their specific identification. Fulldetails of the reproductive phenomena of the present species, as elicited by Everts,are embodied in the preceding general account of the genus Vorticella, illustratedby Figs. 32-47 of PI. XXXV. Everts interpretation of the minute histology of the contractile footstalk ofVorticella nebuUfcra is illustrated by the figures from his drawings reproduced inFigs. I and 2 of the accompanying woodcut. According to this investigator, thecentral muscle-like cord exhibits, under the moderately high magnification of 600diameters (Fig. i) the aspect of being finely and evenly striate transversely, after the. Figs, i and 2. Vorticella nebulifera, Ehr. i. Contracted zooid with at f muscle-like element of the pedicle exhibitinga transversely striated aspect, X 600 (after Everts). 2. Diagrammatic longitudinal section of lower half of the body ;c, cuticle; s, central muscle-like cord of pedicle continued at m into the myophan layer of the body-wall; x, itscentral cavity ; r, cortical layer ; i, central cavity of the body ; «, nucleus or endoplast, X 1800 (after Everts). Fig. 3. CarcJicsiu})! polypinnm, Lin. sp. Portion of stem as observed by the author ; a, external sheath or cuticle ;b, central contractile cord, with c its granular sarcolcmma-like investing membrane, which has become exposed andtwisted on itself through the fracture and shrinking of the central cord, X 2000. manner of th
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Keywords: ., bookauthorkentwsavillewilliamsa, bookcentury1800, bookdecade1880
