230 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
The change of color is not due to wearing of the hairs, but is 
apparently brought about by a moult. 
Cranial characters . The skull of P. lutensis is very distinct; 
it is long and slender, deeply constricted interorbitally, with very 
long, narrow rostrum and frontals; the zygoma are slender, lie 
close to the skull, and slant backward from the rostrum, causing 
the forward part of the skull including the zygoma to have a 
wedge-like appearance (in other mink the zygoma stand out in 
a more abrupt curve). Postorbital processes short and weak; 
audital bullae larger and deeper than in P. lutreocephalus , though 
not so large nor so deep as in P. vulgwagus. The distance, meas¬ 
ured from front of nasals or premaxilla to postorbital process, is 
much greater in P. lutensis than in the skull of any other mink, and 
will alone serve to distinguish the species. Dentition very heavy 
Flesh measurements of fully adult specimens of Putorius 
(Lutreola) lutensis. 
No. 
Locality. 
Sex. 
Total 
length. 
Tail 
vertebrae. 
Hind 
foot. 
7,225 
Fla., salt marsh opposite Matan- 
zas Inlet (Type). 
A 
574 
197 
68 
7,229 
Fla., salt marsh opposite Matan- 
zas Inlet. 
A 
550 
182 
68 
7,228 
Fla., salt marsh opposite Matan- 
zas Inlet.. 
A 
560 
190 
70 
7,224 
Fla., salt marsh opposite Matan- 
zas Inlet. 
A 
553 
203 
69.5 
7,226 
Fla., salt marsh opposite Matan- 
zas Inlet. 
$ 
579 
200 
71 
7,230 
Fla., salt marsh opposite Matan- 
zas Inlet.’ . . 
? 
477 
161 
57 
5,032 
Geo., St. Mary’s. 
Geo., St. Mary’s. 
$ 
583 
188 
72 
5,030 
$ 
539 
180 
70 
5,031 
Geo., St. Mary’s. 
Geo., St. Mary’s. 
$ 
564 
192 
66 
5,034 
$ 
526 
180 
61.5 
5,033 
Geo., St. Mary’s. 
$ 
536 
179 
61 
5,035 
Geo., St. Mary’s. 
? 
501 
162 
61 
6,309 
Geo., Ossabaw Island .... 
A 
615 
185 
72 
6,303 
Geo., Montgomery. 
$ 
605 
203 • 
73 
6,304 
Geo., Montgomery. 
A 
605 
185 
76 
6,302 
Geo., Montgomery. 
A 
580 
170 
75 
6,306 
Geo., Montgomery. 
? 
550 
175 
64 
6,308 
Geo., Montgomery. 
$ 
535 
170 
64 
6,307 
Geo., Montgomery. 
? 
501 
160 
60 
6,305 
Geo., Montgomery. 
? 
526 
160 
64 
