. The Cambridge natural history. Zoology. 102 PROTOZOA some of them indifferent to their base; others are only found on Algae, or again only epizoic on special Metazoan hosts, or even on special parts of these. Thus Rhyncheta is only found on the couplers of the thoracic limbs of Cyclops, and Choanophrya on the ventral surface of its head and the adjoining appendages. 'tr. Fig. 62,—Ohoanophrya infundibulifera. A, adult; B-D, tentacles in action in various stages ; E, tentacle at rest; F, young, just settled down, a, a, a, Tentacles in various stages of activity ; c, central cavity ; , contr
. The Cambridge natural history. Zoology. 102 PROTOZOA some of them indifferent to their base; others are only found on Algae, or again only epizoic on special Metazoan hosts, or even on special parts of these. Thus Rhyncheta is only found on the couplers of the thoracic limbs of Cyclops, and Choanophrya on the ventral surface of its head and the adjoining appendages. 'tr. Fig. 62,—Ohoanophrya infundibulifera. A, adult; B-D, tentacles in action in various stages ; E, tentacle at rest; F, young, just settled down, a, a, a, Tentacles in various stages of activity ; c, central cavity ; , contractile vacuole ; em, ciliated embryo showing contractile vacuole and nucleus ; /, spiral ridge ; m, muscular wall of funnel; n, nucleus; tr, opening of funnel. (A-D, F, modified after Zenker; E, original.) We owe our knowledge of this group to the classical works of Ehrenberg, Claparede and Lachmann, Stein, E. Hertwig, and Biitschli. Plate has shed much light on Bendrocometes, and Hickson has studied its conjugation. Ischikawa-^ has utilised modern histological methods for the cytological study of Uphelota hiitschliana. Een^ Sand has written a useful, but unequal, and not always trustworthy monograph of the Order,^ containing an elaborate bibliography. ^ In Journ. Coll. Sc. Japan, x. 1896. ^ ^hide monographique sur le growpe des TentacuUfires, Ann. Soc. Beige Micr. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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