File:Image from page 162 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14785007565).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

View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

FIG.-131. -- Pectinatella magnifica, 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.

Text Appearing Before Image: FIG. l.it. — PlumateUa 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 the fresh-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).

Text Appearing After Image: APPENDIX TO CHAPTER IX KEY TO THE PRINCIPAL SPECIES OF EARTHWORMS OF THE UNITED STATES ffi. Clitellum begins on segment xiii or xiv; $ poreon segment xviii or xix ; 2 gizzards in segmentsv and vi. 61. 2 dorsal vessels ; lives in soil of prairies 62- 1 dorsal vessel ; lives in river-bottom landClitellum does not begin in front of segment xviii;$ pore on segments xii and xiii, or (usually) xv.61. Prostomium incompletely divides buccal lobe[genus Allolobophora], (Diplocardia\ commitnisD. riparia 144 ZOOLOGY ci. Tubercles on segments xxviii-xxxi; ill-smelling ; purple-banded ... A. fcetida Co. Tubercles on segments, xxxi and xxxiii . A. caliyosa r3. Tubercles 011 segments xxvii, xxviii; color reddish brown .... A. tumid a r4. Tubercles on segments xxiv-xxx ; about 100 segments ..... A. parva 05. Tubercles on segments xxviii-xxx . A. subrubicunda c$. Tubercles on segments xxix-xxxi (occa-sionally xxix, xxx); number of seg-ments, 150 A. rose a 62- Prostomium completely divides buccal lobe[g

Note About Images