MAMMALS. 



51 



1872. 



9. "Spike-horned Muledeer." <Amer. Nat., VI, pp. 692-693, Nov., 1872. 



The "Spike-horned" mule deer recorded in a previous number of the American Naturalist 

 (July, 1872) by E. D. Cope is shown to have been a young elk. 



10. Description of a Specimen of Balcenopterus musculus. <Amer. Nat., VI, pp. 



473-474, August, 1872. 



Review of a memoir by Thomas Dwight, Jr., on this species (Mem. Boston Soc. Nat. Hist., 

 II, pp. 203-230, June, 1872). 



11. The Habits of the Orca. <Amer. Nat., VI, pp. 474-475, August, 1872. 



Review of C. M. Scammon's paper 'The Orca' (Overland Monthly, July, 1872, pp. 52-57) . 



12. [Geographical Variation in Mammals and Birds.] <Proc. Boston Soc. Nat. Hist., 



XV, pp. 156-159, Sept., 1872. 



Mainly in reference to birds. 



1874. 



13. Laws of Geographical Variation in North American Mammals and Birds. 



<Amer. Nat., VIII, pp. 227-229, April, 1874. 



In reference to R. Ridgway's paper (Amer. Nat., VII, pp. 548-555, Sept., 1873) on the 

 same subject. 



14. Notes on the Mammals of portions of Kansas, Colorado, Wyoming, and Utah. 



<Bull. Essex Inst., VI, pp. 43-66, May, 1874. 



Four distinct lists of mammals observed in the region named in the title, with notes o;i 

 their habits, distribution, etc. I. Mammals of Middle and Western Kansas, 28 species, 

 with three pages on Cynomys ludovicianus, pp. 45-52. II. Mammals of Park County, 

 Colorado, 37 species, pp. 53-58. III. Mammals of Carbon County, Wyoming, 32 species, 

 pp. 58-61. IV. Mammals of Great Salt Lake Valley, Utah, 42 species, pp. 61-66. 



15. Notes on the Natural History of portions of Dakota and Montana Territories, 



being the substance of a report to the Secretary of War, on the collections 

 made by the North Pacific Railroad Expedition of 1873, Gen. D. S. Stanley, 

 commander. <Proc. Boston Soc. Nat. Hist., XVII, pp. 33-91, June, 1874. 

 (Also as a separate pamphlet of 61 pp., 1874.) 



Mammals, pp. 36-45 (pp. 6-13 of the reprint), 31 species; notes on habits, distribution, 



etc. 



16. On Geographical Variation in Color among North American Squirrels; with a 



list of the Species and Varieties of the American Sciuridse occurring north 

 of Mexico. <Proc. Boston Soc. Nat. Hist., XVI, pp. 276-294, June, 1874. 



Variation in color, pp. 276-286; list of species and varieties, pp. 286-294. Genera: 

 Sciurus, Sciuropterus, Tamias, Spermophilus,' Cynomys, Arctomys. Species, 25, with 19 

 additional varieties = 44 forms. Vars. nov.: (1) Tamias quadrivillalus var. pallidus, p. 289; 

 (2) Spermophilus tridecem-linealus var. pallidus, p. 291; (3) Spermophilus parryi var. kodia- 

 censis, p. 292. 



17. Scammon's ' Marine Mammals of the Northwest Coast and American Whale- 



fishery.' <Amer. Nat., VIII, pp. 632-635, Oct., 1874. 



An appreciative review of this important work (4 to). 



