Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0101clau Year: 1884 196 PROTOZOA. solid nutriment. The best known genus is Euylena, which, according to Stein, has a mouth and gullet. In their inactive stage they secrete a capsule and divide up into parts which pass out as mastigopods. Euglena viridis (fig. 134), E. sanguinolenta. Another genus, also with a mouth, is Astasia Ehrbg. A. triclwpkora Ehrbg., with rounded posterior end, a very long flagel- lurn, and an abruptly terminated anterior end. The genera Salpingoeca and Codosiga described by Clark wer
Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0101clau Year: 1884 196 PROTOZOA. solid nutriment. The best known genus is Euylena, which, according to Stein, has a mouth and gullet. In their inactive stage they secrete a capsule and divide up into parts which pass out as mastigopods. Euglena viridis (fig. 134), E. sanguinolenta. Another genus, also with a mouth, is Astasia Ehrbg. A. triclwpkora Ehrbg., with rounded posterior end, a very long flagel- lurn, and an abruptly terminated anterior end. The genera Salpingoeca and Codosiga described by Clark were included by Biitschli under the name Oylicomastiges, on the ground that they possess a well-marked collar surrounding the basis of the flagellum, and corresponding to the collar on the entoderm cells of the Sponges (hence Clark regarded the Sponges as most nearly related to the Flagellata); Codosiga Botrytis Ehrbg, forming- colonies, possessing food vacuoles which contain the solid bodies taken up as nutriment, with nucleus and contractile vacuole. Salpingoeca Clarkii Biitsch. (the individuals of this species possess a shell). Another group, the Cilioflagel- lata* is characterised by the posses- sion of a row of cilia, situated in a furrow of the hard cuticular exo- FIG. ^«,« tripos (after skeleton (fig. 135), in addition to Nitzsch). the flagellum. The Peridinice, some of which are of peculiar appearance, with large horned processes of the shell, belong to the group, and are allied, so far as their development is known, most nearly to the Euglence. The mouth lies in a depression; there is sometimes a kind of gullet, at the end of which the nourishing materials pass into a vacuole. In addition to the locomotive and armoured forms, there are also some without shell or organs of locomotion; and again there are encysted stages in the interior of which a number of small young forms are said to take their origin (Ceratium cornutum Perhg., Peridinium tabulation Ehrbg). Fina
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