424 Miscellaneous Intelligence. 



have demonstrated for surface pelagic animals a far greater 

 bathymetrical range than they were known to have, and one 

 which, perhaps, corresponds to the wide bathymetrical range of 

 many so-called deep-sea types which extend from the greatest 

 depths at which animals have been dredged almost to the regions 

 of the littoral belt. 



An interesting chapter on the " Dissogonie " of Ctenophores 

 concludes this capital memoir. Chun has suggested the term 

 Dissogonie to indicate the peculiar reproduction and development 

 of embryo CtenophoraB. He has observed that the Cydippe form 

 of Bolina, after the degeneration of the genital organs (which are 

 fully developed soon after leaving the egg envelope), is developed 

 into the Bolina form. This monograph is illustrated by five ex- 

 cellent plates from the pencil of Dr. Chun. One of the plates 

 gives a sketch of the deep-sea tow net, as well as of the photo- 

 graphic apparatus used by Dr. Chun. a. ag. 



6. Report on the Annelids, of the Dredging Expedition of 

 the IT. S. Coast Survey Steamer " Blake / " by E. Ehlers. 

 336 pp., 4to, with 60 plates. — Memoirs of the Mus. Comp. Zool. 

 vol. XV. Cambridge, 1887. — An admirable volume. Some of 

 the plates are colored ; all engraved in the best style of the art. 



IV. Miscellaneous Scientific Intelligence. 



1. National Academy of Sciences. — The following is a list of 

 the papers entered to be read at the April meeting of the 

 Academy in Washington : 



J. E. Oliver : The Rotation of the Sun. 



T. Sterbt Hunt : The Foundations of Chemistry. 



T. C. Mendenhall : On an Improved Form of Quadrant Electrometer, with 

 Remarks upon its use. 



E. D. Cope : On the Vertebrate Fauna of the Puerco Series. On the Audi- 

 tory Bones of the Batrachia. 



Ormond Stone: The Orbit of Hyperion. 



B. K. Emerson : Map of Connecticut River Region in Massachusetts. 



A. Hyatt: Parallel Series iu the Evolution of Cephalopoda. Evolution of 

 Cephalopoda in the Fauna of the Lias. 



L. F. Ward : The Evidence of the Fossil Plants as to the Age of the Potomac 

 Formation. 



S. P. Langley : Visiou and Energy. 



H. A. Rowland : Report of Progress in Spectrum Photography. Note on the 

 Spectrum of Carbon and its Existeuce in the Sun. 



H. P. Bowditch: Reinforcement and Inhibition. 



A. Graham Bell : On Apparent Elasticity produced in an Apparatus by the 

 Pressure of the Atmosphere ; and the Bearing of the Phenomenon upon the 

 Hypothesis of Potential Energy. 



H. A. Newton: The Orbits of Aerolites. 



E. C. Pickering : A Large Photographic Telescope. 



W. T. Sedgwick and G. R. Tucker: A New Method for the Biological Exam- 

 ination of Air ; with a description of an Aerobioscope. 



Wolcott Gibbs and Hobart Amoey Hare : Preliminary Notice of the Object, 

 Methods and Results of a Systematic Study of the Action of Definitely Related 

 Chemical Compounds upon Animals. 



Ira Remsen: On the Constitution of the so-called Double Halogen Salts. 

 Studies on the Rate of Decomposition of the Bromides of the Saturated Alcohol 

 Radicals. 



