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Westminster R. Jan. 1855. by Huxley on Carpenter's Physiology p. 243. H objects strongly to Carpenter palæontological view He says if an old form be "osculant" it cannot be "general" with respect to the types between which it lies, compares the groups in each type to a sphere

p. 244. Does not admit trilobite like embryo of crustacean & is furthest from type. Disputes vehemently Agassiz view on fish: generalised only from salmon, which latter - is not truly homocercal - in very earliest age is homocercal, then heterocercal & in adults state falsely homocercal - says it wd. be most strange if the embryo was originally heterocercal & ∴ asymmetrical.

p 245. Holds that it is certain, that "the

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Heterocercal tail is an advance in development as compared with th homocercal one."

p 246 Disputes Cystideaus & Crinoids being less aberrant modified of the Echinoderm type than star-fishes & Echini. Lingula, the earliest Brachiopod is th most aberrant, th tetrabranchiate Cephalopods not nearer the common plan of the Mollusca then are the Dibranchiate.

[illeg] & Bellerophon cannot be considered as approaching Cephalopoda, as thy appear to have been Heteropod which assuredly do no approach Cephalopods.

The facts adduced regarding Cephalaspis, Labyrinthodon & Rhynchosaurus only show that thy are osculant which cannot be taken as evidence that they departed less widely from the common plan. Does not think Palæotherium is nearer th Mammalian type than the living pig.