^^ THE NEW EVOLUTION ^|^ 



12.5. ■ — Free-swimming larva; the upper half of the 



body is endodermal and the lower half is ectodermal. 

 Fig. 12.6. — A dicyemid (Dicyemopsis macroce-phalus), a creature 



more or less closely related to the flukes. After van 



Beneden. 

 Figs. 12.7-1x8. — A rhopaluran (Rhopalura giardif), a creature more 



or less closely related to the flukes; 12.7, male; 1x8, 



female. After van Beneden. 



Various Types of Animal Life (Page 103) 



Fig. 119. — A bird-louse (Lipeuras variabilis). From Denny. 

 Fig. 130. — A "Miiller's larva" — the young of a polyclad turbel- 



larian (Eurylepta amiculata). After Hallez. 

 Fig. 131. — Maggot of a horse-fly (Tabanus kirzgt). From Hindle, 



after King. 

 Fig. 132.. — Maggot of the European rat-flea (Ceratophyllus fasci- 



afus). Courtesy of the Department of Agriculture. 

 Fig. 133. — A young dragon-fly (^Archilestes calijomica). From 



Kennedy. 

 Fig. 134. — A gastrotricha {Chcztonotus maximus). After Biitschli. 

 Fig. 135. — M-icrostomum lineare. After von Graff. 

 Fig. 136. — A rotifer (Euchlaris pellucida^y side view. From Har- 



ring. 



[x84] 



