Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 SECTION V. THE CLASS OF TUNICATA OR ASCIDIANS. THE Tmiicata arc one of the great groups of mollusk- like animals which authors include in the Sub-branch of Molluscoidea. They are exceedingly unlike typical mollusks in their general appearance, and very unlike them in many points in their structure. Gegenbaur classes them with the Venues. The Tunicates are more or less bottle- shaped or pouch-like, and attached to submarine bodies, are entirely destitute of hard parts, being covered by an elastic tunic, in
Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 SECTION V. THE CLASS OF TUNICATA OR ASCIDIANS. THE Tmiicata arc one of the great groups of mollusk- like animals which authors include in the Sub-branch of Molluscoidea. They are exceedingly unlike typical mollusks in their general appearance, and very unlike them in many points in their structure. Gegenbaur classes them with the Venues. The Tunicates are more or less bottle- shaped or pouch-like, and attached to submarine bodies, are entirely destitute of hard parts, being covered by an elastic tunic, instead of a shell, and some kinds are so transparent as to exhibit plainly their internal structure. Some kinds are simple and solitary ; •' Tumcates . others live together in communities ; and A compound cluster of others still are compound clusters (Fig. TuniratPS or ^^a ' Bultenia. Reduced. 6o3. Fio. 654. FIG. 655.
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