Page:The Scientific Monthly vol. 3.djvu/613

 ORIGIN AND EVOLUTION OF LIFE

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��the Archipterygian theory of the origin of the limb, seeking the proto- ^rpe of the modern limbed forms in the fin of the modern Australian Ivmg fish, Ceratodtis. This hypothesis of Gegenbaur, warmly sup- ported by a talented group of his students, is memorable as the last of

the great hypotheses regarding vertobrate evolution founded exclusively

���Fio. 15. The Extrtmeb or Adiftation in Motion and Illuui

SXISTINO BONT FlSHBS (TBLEOSTS) OF TUB AbTSSAL REGIONS Of TBB OCEAHB. Al-

tbough man; dIServnt orders of Teleosts are repreaented «acb tjpe bai acquired phoa- pkoreBcent organs, nffordlag a Qpe example at couvergeuce. The bod; form ia of great diTeralt;,

1, Tbread-eel, HemicMhyi icolopaeeut RlcbardBon. 2. Barathnnut dlapAoiiM Brauer. 3, Tieotcopelui macroltptdottit JobDBOD. 4. 5, Qattrnttomut bairdl GUI and Bfder. 6, Otgantactlt Tanhoefftni Brauer. T, atemoptyx Mapluma Lowe. 8. Oigait- tura chuni Brauer. 9, ifelanc*tomUit melanop* Brauer. 10, BtylophHtalaiitt para- dovii* Brauer. 11. Optotftoproctm lolcatm ValllaDt.

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