134 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Allen. J. A. List of mammals collected in Alaska by the Andrew J. Stone 

 expedition of 1901. Bull. Amer. mus. nat. hist., xvi, p. 215-230. July 12, 

 1902. 



Twenty-six species. Critical notes and held observations. 

 Allen. J. A. A preliminary study of the South American opossums of the 

 genus Didelphis. Bull. Amer. mus. nat. hist., xvi. p. 249-279. August 18, 

 1902. 



Contents: introduction (p. 249), historical resume and nomenclature 

 (p. 250), species and subspecies of Didelphis (p. 253), descriptions of South 

 American species and subspecies (p. 257), tables of external measurements 

 (p. 270). The name marsupialis is applied to the South American species 

 currently known as karkinophaga, and mesamericana Oken to the large 

 Mexican opossum. I), marsupialis etensis subsp. now is recorded from 

 Panama. 

 Allen. J. A. Mammal names proposed by Oken in his "Lehrbuch der 

 Zoologie." Bull. Amer. mus. nat. hist., xvi. p. 373-379. October 11. 1902. 

 The following names of North American mammals are changed : 

 Spermophilus to Citellus, Galictis to Grison, Galera to Tayra. Didelphis 

 marsupialis (as applied to the Mexican opossum) to D. mesamericana. 

 Allen. J. A. A new caribou from Ellesmere Land. Bull. Amer. mus. nat. 

 hist., xvi, p. 409-412, text fig. 1-2. October 31, 1902. 

 Rangifer pearyi. 

 Allen, J. A. The hair seals (family Phoeidae) of the North Pacific Ocean 

 and Bering Sea. Bull. Amer. mus. nat. hist., xvi. p. 459-499, text fig. 1-10. 

 December 12. 11)02. 



Contents : introduction (p. 459), nomenclature (p. 461), sexual differences 

 in dentition in Phoca vitulina (p. 471). comparison of the Atlantic and 

 Pacific forms of the Phoca vitulina group (p. 471), the North Pacific 

 Phoeidae (with descriptions of new forms) (p. 473). The name Phoca 

 largha is rejected as undeterminable (p. 463-464), and the seals to which 

 it has been applied are divided into six forms : Phoca ochotensis (Okhotsk 

 Sea). /'. o. macrodens (southeastern Kamschatka to Point Barrow, Alaska), 

 P. stejnegeri (Commander Islands), P. richardii (continental coast of 

 North Pacific), P. r. pribilofensis (Pribilof Islands), and P. r. geronimensis 

 (Lower California and Santa Barbara Islands). The other species treated 

 are : Erignathus barbatus (p. 473), Histriophoca fasciata (p. 474), Phoca 

 groenlandica (p. 475), Phoca hispida (p. 477), and P. h. gichigensis 

 (p. 478). 

 Allen, J. A.: Bangs, Outram: Evermann, Barton Warren: Gill. 

 Theo. ; Howell, Arthur H. ; Jordan. David Starr : Merriam. C. 

 Hart; Miller, G-errit S., Jr. : Nelson, E. W. ; Rathbun. Mary: and 

 Thomas. Oldfield. A method of fixing the type in certain genera. Sci- 

 ence, n. s.. xvi. p. 114-115. July 18, 1902. 



The following rule recommended : A generic name which is the same 

 as that of an explicitly included species (or a cited post-Linnaean synonym 

 of such species) takes that species as its type regardless of subsequent 

 elimination. 



