78 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



P. 754. Notes on a collection of fishes obtained in the Gila River, at 

 Fort Thomas, Arizona, by Lieut. W. L. Carpenter, U. S. 

 Army. By Philip H. Kirsch. 



pp. 555-558. 



P. 755. Notes on some neotropical birds belonging to the United States 

 National Museum. By Hans von Berlepsch. 



pp. 659-566. 



P. 756. On the classmcation of the mail-cheeked fishes. By Theodore 

 Gill. 



pp. 567-S92. 



P. 757. Gleanings among the Pleuronectids, and observations on the 

 name Pleuronectes. By Theodore Gill. 



pp. 593-606. 



P. 758. Note on the genus Spheroides. By Theodore Gill. 



pp. 607-608. 



P. 759. A list of fishes from a small tributary of the Poteau River, 

 Scott County, Arkansas. By Charles H. Gilbert. 



pp. 609-610. 



P. 760. Descriptions of new Braconidse in the collection of the U. S. 

 National Museum. By William H. Ashmead. 



pp. 611-671. 



TOLUME XII, CONTAI]SriNG PAPERS 761-789. 



Smithsonian Institution. | United States National Museum. | | 



Proceedings | of the | United States National Museum. | | 



Volume XII. | 1889. | | Washington: | Government Printing 



Office. I 1890. 



8vo., pp. viii, 1-686, 23 pis., 14 figs. 



P. 761. A review of the genus Xvphooolaptes of Lesson. By Robert 

 Ridgway. 



pp. 1-20. 



P. 762. A review of the genus Sclerums of Swainson. By Robert 

 Ridgway. 



pp. 21-31. 



P. 763. Descriptive notes of new genera and species from the Lower 

 Cambrian or Olenellus zone of North America. By Charles 

 D. Walcotit. 



pp. 33-46. 



P. 764. New North American Acrididse, found north of the Mexican 

 boundary. By Lawrence Bruner. 



pp. 47-82, 1 plate. 



P. 765. Contributions to the natural history of the Commander Islands. 



A. Contributions to the history of Pallas' cormorant. By 

 Leonhard Stejneger. 



B. Description of soine bones of Pallas' cormorant, Ph/da- 

 cfrocorax perspicillatus. By Frederic A. Lucas. 



pp. 83-94, 3 pis. 



