Elementary anatomy and physiology : for colleges, academies, and other schools elementaryanato00hitc Year: 1869 Skeleton of the Perch. '•••: .-•••/ /W Section of the bony scale of Zepidosteus. a. Showing the regular distribution of the Lacunae and of the connecting Canalicali. K Small portion more highly magnified. 219. What are the only Vertebrae of Fishes ? What is peculiar about their articula- ting surfaces ? 220. Why have Fishes no Sternum or Pelvb ?

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