18 Remarks on Zoological Nomenclature. 



3d. That the ray towards which plants bend occupies the in- 

 digo space of Fraunhofer. 



4th. This movement is due to pure light as distinguished 

 from heat and tithonicity. 



5th. That pure light is capable of producing changes which 

 result in the development of palpable motion. 



6th. The bleaching of chlorophyl is most active in those parts 

 of the spectrum which possess no influence in its production, and 

 are complimentary to the yellow rays. 



7th. This action is also due to pure light. 



We have, therefore, an analysis of the action of every ray in 

 the luminous spectrum upon vegetation. The several effects 

 produced are not abruptly terminated within the limits of any of 

 the spaces, but overlap to a certain extent, a fact which coincides 

 with our experience of the properties of the rays. Whilst heat 

 and tithonicity are capable of causing the union of mineral parti- 

 cles, light appears to be the only radiant body which rules pre- 

 eminent in the organic world. To the animating beams of the 

 sun we owe whatever products are necessary to our very exist- 

 ence. 



New York, Oct. 18th, 1843. 



Art. II. — Remarks on Zoological Nomenclature; by S. S. Hal- 

 deman, Professor of Zoology in the Franklin Institute, Phila- 

 delphia. 



It is gratifying to perceive with what unanimity certain rules, 

 tending towards an uniformity of practice on this subject, have 

 been adopted, by naturalists of different countries. The basis of 

 these is undoubtedly the practice of Linnaeus; but Smith, Will- 

 denow, Swainson, (Cab. Cyc. Birds, p. 231,) Illiger, and Ra- 

 finesque, by special rules ; and ether naturalists by custom, 

 have enlarged the original code as additions became necessary.* 

 The laws laid down by the British Association, being founded 

 upon modern practice, contain little that can be objected to ; and 



* The Academy of Natural Sciences of Philadelphia has decided that the author 

 to whom a species originally belongs, is entitled to the citation of it, in whatever 

 genus it may be subsequently placed by others ; and that the reading of a paper 

 before a society, does not constitute a publication. 



