. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE EARrilWOBM 173 also be told by the sort of funnel at the hinder end of the trans- parent bodj^, from the margins of which finger-like filaments arise which aid in respiration (Fig. 163).. Fig. — Dero, the duck-weed worm. Enlarged. After Reighard. Tlio lettering is as follows: or., mouth; phx., pharynx; oe., ; so-o., segmental organ ; in., intestine ; pao., pavilion or tunnel ; , finger- like appendages. From Reighard. Nais' does not construct tul)es, and it has no respiratory fila
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE EARrilWOBM 173 also be told by the sort of funnel at the hinder end of the trans- parent bodj^, from the margins of which finger-like filaments arise which aid in respiration (Fig. 163).. Fig. — Dero, the duck-weed worm. Enlarged. After Reighard. Tlio lettering is as follows: or., mouth; phx., pharynx; oe., ; so-o., segmental organ ; in., intestine ; pao., pavilion or tunnel ; , finger- like appendages. From Reighard. Nais' does not construct tul)es, and it has no respiratory filaments at the hinder end of the body (Fig. 164). It also has eyes; while Dero has none. Both Dero and Nais have the interesting habit of reproducing lij' dividing the body trans- versely. In the middle of the body tentacles begin to arise, a new mouth is formed, and the worm constricts into two. Indeed, sometimes several new heads may be forming in the ^ Twis, a 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
Size: 1507px × 1658px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
