X. On the skeleton of the marsipohranch fishes.— Part II. Petromyzon

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Abstract

In this Second Part the Marsipobranch type of skeleton will be described in several stages, as far as my materials go; afterwards, I hope to be able to show in a Third Part some of the organs in the act of transformation, the specimens for which I am now expecting. In the present paper I shall describe :— A. The skeleton after transformation. a . In the adult Petromyzon Jluviaiilis .. b . In one-third grown P. marinus . c . In newly metamorphosed P. marinus. d . In very small (not quite transformed) young of P. marinus. B. The early embryo of P. planeri ; and C. The larval form (or Ammoccete) of P. fluviatilis , ready for transformation.*

Publisher

The Royal Society

Subject

General Medicine

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