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 "■ 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 '•■ 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- 



