go NATURAL SCIENCE. Feb.. 1894. 



be so, the organ must be somewhat archaic, and one would expect to 

 find it in Nauiilus, where, to the best of our knowledge, it has never 

 been described. 



Among the more important new arrivals at the London Zoological 

 Society's Gardens are two leopards which represent the extremes of 

 colouration to be seen in the Leopard tribe ; one of them is the black 

 variety of the common leopard, the other the so-called Snow Leopard 

 or Ounce. The latter animal, presented to the Society, is a valuable 

 acquisition, for the Snow Leopard is a costly animal to buy, and it 

 inhabits a limited tract of country ; hence very few specimens have 

 been on view in the Resrent's Park. 



SiGNOR G. A. DE Amicis has just published {Boll. Soc. Geol. 

 Ital. 1893), "I foraminiferi del pliocene inferiore di Trinite-Victor 

 (Nizzardo)," an important contribution to our knowledge of the 

 Pliocene Foraminifera of Italy. One hundred and twenty-six forms 

 are recorded, to each of which a very full and interesting synonymy 

 is given, while only two forms are recorded as new, an evidence of 

 the extreme care bestowed upon his work by the author, who has 

 swept away many varietal forms recently described as new by other 

 authors from imperfect acquaintance with the literature. 



Students of cell-division will find an interesting article by 

 E. Overton on the reduction in number of the chromosomes in the 

 nucleus of plants, published in the Vierteljahrschrift dev Natuvforschenden 

 Gesellschaft in Zurich (Jahrg. xxxviii., pp. 169-186, 1893). 



The American Journal of Science ior January contains a paper by 

 Mr. S. P. Langley on " The Internal Work of the Wind." The 

 subject is not physiological except so far as connected with what the 

 author calls the science of Aerodromics, which is nothing more terrible 

 than flying. In the same number E. H. Williams, jun., concludes 

 that they have had but one Ice Age in North America, and that one 

 both short and recent. C. D. Walcott has a note on Cambrian Rocks 

 of Pennsylvania, and J. B. Wood worth, while discussing the erosive 

 action of blown sand in New England, finds it necessary to coin the 

 word " glyptolith " for a wind-carved rock surface. Old England sees 

 no necessity for anything less intelligible than good old English. 



The Midland Naturalist ended its career, as announced, with the 

 December number, and The Field Club is now incorporated with 

 Nature Notes. We are pleased to learn that Science Gossip, which 

 ceased to appear last autumn, is shortly to be revived under the 

 editorship of Mr. John T. Carrington, assisted by Mr. Edward Step. 



