64 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



P. 553. On the value of the fin-rays and their characteristics of 

 development in the classification of the fishes, together 

 with remarks on the theory on degeneration. By John A. 

 Ryder. 



pp. 71-S'2, 1 fig. 



P. 554. On fulgurites. By George P. Merrill. 



pp. 83-91, 1 plate. 



P. 555. Descriptions of some new species of birds, suppo.sed to be 

 from the interior of Venezuela. By Robert Ridgwa3^ 



pp. 92-94. 



P. 556. On ^Edrelata sandwicJiensis Ridgw. By Robert Ridgway. 



pp. 95-96. 



P. 557. Descriptions of a new genus and species of mole, Dymecodon 

 piUrostru, from Japan. By Frederick W. True. 



pp. 97-98. 



P. 558. Review of Japanese birds. 1. The woodpeckers. By Leon- 

 hard Stejneger. 



pp. 99-12-1, 1 plate. 



P. 559. Catalogue of animals collected by the Geographical and 

 Exploring Commission of the Republic of Mexico. By 

 Fernando Ferrari-Perez. 



pp. 12.5-199. 



P. 560. The British marsh-tit. By Leonhard Stejneger. 



pp. 200-201. 



P. 561. Report on the mollusks collected by L. M. Turner at Ungava 

 Bav, North Labrador, and from the adjacent Arctic seas. 

 b/ William H. Dall. 



pp. 202-208, 1 plate. 



P. 562. Contributions to the natural history of the Commander 

 Islands. No. 6. Report on Bering Sea Island mollusca, 

 collected by Mr. Nicholas Grebnitzki. By William H. Dall. 



pp. 209-219. 



P. 563. On the occurrence of a new species of Rhinoptera {R. encenadm) 

 in Todos Santos Bay, Lower California. By Rosa Smith. 



p. 220. 



P. 564. An annotated list of the mammals collected by the late Charles 

 L. McKay in the vicinity of Bristol Bay, Alaska. By Fred- 

 erick W. True. 



pp. 221-224. 



P. 565. Notes on some fishes collected at Pensacola by Mr. Silas 

 Stearns, with a description of one new species {Chcetodon 

 aya). By David S. Jordan. 



pp. 225-229. 



P. 566. A review of the American species of Tetraodontidee. By 

 David S. Jordan and Charles L. Edwards. 



pp. 230-247. 



