On the Organic and Inorganic Changes 0/ Parkeria. 45 the snake as non-poisonous. T find, however, a large poison-gland ; and the author's mistake is probably due to the simi-larity between the maxillary teeth, which is in striking contrast to the abruptly enlarged anterior fangs of ordinary Hydrojyhides. Although I am unable to find any external characters by which to separate //. viper ina from its allies, I should have ])roposed a new generic name were it not that Disteira, Lac^p., specimens of the type species of which I have unfor-tunately no means of_ investigating, may possibly possess a dentition similar to that of IJ. viperina. Vll. — On the Organic and Inorganic Changes of Parkeria, together with Further Observations on the Nature of the Opaque Scarlet Spherules in Foraminifera. By H. J. Carter, F.R.S.* [Plate v.] In the * Annals ' for March and April last (vol. i., 1888) I described in separate communications " Two new Genera allied to Loftusia^'' viz. Stoliczkiella Theobaldi and Millarella cantahrigiensis, and the "â– Nature of the Opaque Scarlet Spherules found in the Chambers and Canals of many Fossilized Foraminifera," the former accompanied by a footnote (p. 180) in which allusion is 'made to other specimens of Parkeria in which Millarella appeared to be present in the condition of a " foreign nucleus " over which the Parkeria had grown ; but it now seems to me (after examination of more specimens of the same kind) that this " nucleus " must have been a subsequent instead of a pri-mary formation, from which the Millarella might have spread itself throughout the whole of the Parkeria^ until the struc-ture of the latter had become obliterated — of course in a living or tmfossilized state. The structure of Millarella (for the terra here must be used in a generic sense) may be stated to present itself under the form of a minutely reticulated rhizopodous mycelium of a brown colour (PI. V. fig. 9, a a), accompanied more or less * lu this communication it should be remembered that I am treating of '•â– Transformations " only, and not of the natural structure of Parkeria, which should be learnt from Prof. Nicholson's illustrated description of this fossil in the ' Annals ' for January 1888, vol. i. p. 1, pi. iii-
VII.—On the organic and inorganic changes of Parkeria, together with further observations on the Nature of the Opaque Scarlet Spherules in Foraminifera
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