File:Image from page 161 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14804857623).jpg

Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library

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Text Appearing After Image: FIG. l.it. — Plumatella polymorpha, a fresh-water ectoproct, magnified 1.5diams. Photo, of living animal by W. H. C. P. 142 APPENDIX TO CHAPTER IX 14° o tiiiguislied, the Endoprocta (Fig.128), in which the individual consistsof a long stalk and a head orbody proper; and the Ectoprocta(Figs. 129-131), usually withoutsuch a stalk. The Ectoprocta arethe prevailing type. The marinespecies form lace-like mats on sea-weed or stand up as branching, bushycolonies (Fig. 129). Some of thefresh-water forms make loose, antler-like colonies (Fig. 130), while otherslie on the surface of a more or lessspherical mass of jelly which theyhave themselves secreted (Fig. 131). FIG.-131. -- Pectinatella maf/nijica,a, dense complex of colonies, growing upona stick. Each star-shaped group represents a single colony. One-half uat.size. Photo, of living mass by W. H. C. P.

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