TRANSACTIONS 



OF THE 



American Philosophical Society, 



Held at Philadelphia, 



FOR PROMOTING USEFUL KNOWLEDGE. 



Vol. XIX. New Series. 

 Part /, ^to, pp. igS, with j Plates. Lately Published. 



CONTENTS. 



Art. I. — A New Method of Determining the General Perturba- 

 tions of the Minor Planets. By William McKnight 

 RiTTER, M.A. 



Art II.— An Essay on the Development of the Mouth Parts of 

 Certain Insects. By John B. Smith, Sc.D. 



Part II, ^to, pp. 2^2, with ij Plates. Lately Published. 



Art. III. — Some Experiments with the Saliva of the Gila Monster 

 (Heloderma suspectum). By John Van Denburgh, 

 Ph.D. 



Art. IV. — Results of Recent Researches on the Evolution of the 

 Stellar Systems. By T. J. J. See, A.M., Ph.D. (Berlin). 



Art. v.— On the Glossophaginae. By HARRISON ALLEN, M.D. 



Art. VI. — The Skull and Teeth of Ectophylla alba. By Harrison 

 ALLEN, M. D. 



Part III 4to, pp. i68, with ^ Plates. Just Published. 



Art. VII. -The Osteology of Elotherium. By W. B. Scott. 



Art. VIII.— Notes on the Canidse of the White River Oligocene. 



By W. B. Scott. 

 Art. IX.— Contributions to a Revision of the North American 



Beavers, Otters and Fishers. By Samuel N. Rhoads. 



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Address THE LIBRARIAN OF THE 



American Philosophical Society, 



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Philadelphia, U. S, A. 



