ADDITIONS TO THE LIBRARY. I9I 



Cope, E. D. Synopsis of the Vertebrate Fauna of tlie Puerco Series. 

 4to. Philadelphia, 1888. 



. The Pineal Eye in Extinct Vertebrates. Svo. Philadelphia, 



1888. 



. The Mechanical Causes of the Origin of the Dentition of 



the Eodentia. 8vo. Philadelphia ? 1889 or '88. 



. A Eeview of the Korth- American Species of Hippotherium. 



8vo. Philadelphia, 1889. 



— . The Horned Dinosauria of the Laramie. 8vo. Philadel- 

 phia, 1889. 



— . Eiitimeyer on the Classification of Mammalia and on Ame- 

 rican Types recently found in Switzerland. 8vo. Philadelphia, 



1888. 



— . The Vertebrate Fauna of the Equus Beds. Svo. Phila- 



delphia, 1889. 



— . The Mechanical Origin of the Hard Parts of the Mammalia. 

 8vo. Philadelphia, 1889. 



— . [Extracts regarding the Palseontological Department of the 

 U.S. Geological Survey.] Svo. Philadelphia, 1890. 



— . See Serials. Washington. Smithsonian Institution. 



Costa Kica and Nicaragua. Argument on the question of the vali- 

 dity of the treaty of limits between Costa Rica and Nicaragua 

 and other supplementary points connected with it, submitted to 

 the arbitration of the President of the United States of America, 

 filed on behalf of the Government of Costa Eica by P. P. Zeledon. 

 Svo. Washington, 1887. 



Eeply to the Argument of Nicaragua on the question of the 



validity or nullity of the treaty of limits of April 15, 1858, to be 

 decided by the President of the United States of America as Ar- 

 bitrator. Piled on behalf of the Government of Costa Eica by 

 P. P. Zeledon. Svo. Washington, 1887. 



. The Case of the Eepublic of Nicaragua submitted to His 



Excellency Hon. Grover Cleveland, President of the United States, 

 Arbitrator, under the treaty of Guatemala of December 24th, 

 1886, Svo. Washington, 1888. Presented by the Oficina de 

 Deposito y Canje de Publicaciones. Hepublica de Costa Rica, San 

 Jose. 



Cotteau, O. Catalogue des Echinides recueillis par M. Eoussel dans 

 le terrain Cretace des Petites Pyrenees et des Corbieres. Svo. 

 Paris, 1887. 



Echinides nouveaux ou peu connus, 6^ et 7^ articles. Svo. 



Paris, 1887 and 1888. 



