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Show 331 Professor Baird.# . Southern specimens differ from northern ones not oply in being smaller, but somewhat in color, so that the T. berlandieri of Professor Baird may perhaps be entitled to subspeciflc rank ( 7. amer-icana subsp. berlandieri), though the material at hand indicates that the two forms will be found to thoroughly intergrade. The chief differences in coloration consist in the more reddish- gray tint of the southern form, with a decided tendency to a continuous light dorsal stripe, instead of this stripe being restricted to the head. Measurements of eleven skulls of TAXIDEA AMERICANA. ii V * a 11505 1178 3148 3078 13908 3033 4196 3767 1390 4135 Locality. do i Qnisqnaton, Iowa tfort feandall Dak Upper D M Chutes, Oreg Fort Crook, Cal Sex. Length. 5.32 5.12 4.75 5.06 4.95 4.92 4.60 4.50 4.75 4.66 4.57 Width. a. 50 3.12 3.07 3.35 3.97 a 07 3.80 3.94 3.85 3.94 Remarks. Rather young. Imperfect. Rather young; berlandieri. berlandieri. Do. Do. LUTRA CANADENSIS. Specimens of this species from northern and southern localities do not differ materially in size; skulls from Newfoundland, Maine, Lake Superior, Washington, and Georgia agreeing very closely in dimensions. In a series of eighteen ( mainly from northern localities), nine attain or exceed a length of 4.25, and three reach 4.50, while two only fall as low as 4.00. Seven specimens from the vicinity of Lake Umbagog, Maine, ( in Mus. Corap. Zool.) average 4.28 in length and 2.93 in width; two of these reach 450 in Length and two fall slightly below 4.00 ( 3.96 and 3.97). Two specimens from Washington, D. C, have a length respectively of 4.45 and 4.50; one specimen from Saint Simon's Island, Georgia, is nearly as large ( 4.32), while a Fort Cobb specimen has a length of 4.22. These four are the only ones from very southerly points. Four other specimens, from as many localities, range from 4.05 to 4.15 ; while three specimens from Newfoundland range from 4.03 to 4.25. While these specimens are too few to warrant positive conclusions as to geographical variations, they seem to point to a great constancy of size throughout a wide range of latitude. • U. S. and Mex. Bonud. Survey. Zool., p. 21. |