2 Hollister — Descriptions of Two New Muskrnts. 



General characters. — Tail short; hind foot small; skull with zygomata 

 not broadly spreading anteriorly; molars small. 



Color. — Fresh pelage: General tone of upperparts bistre, darkest on 

 back and hips, with little or no rusty coloring; sides like back, but with 

 a slight russet tinge; brown spot on chin reduced to a mere streak. 

 Underparts creamy white with a cinnamon wash, varying in its intensity, 

 and shading to white on throat and hind legs; lips whitish. Worn or 

 washed out pelage: Upperparts russet to cinnamon, varying greatly in 

 the specimens at hand, but usually showing much more red than in fresh 

 coat, or in any pelage of F. z. spatidatus. 



Cranial characters. — Skull with zygomata not broadly spreading ante- 

 riorly as in spatulatus ; rostrum and nasals longer; parietals very small, 

 squamosal covering most of area of braincase, even in young animals; 

 interorbital ridge extreme in development into a blade-like crest; teeth 

 small. 



Measurements. — The series from the type locality was received without 

 flesh measurements. The length of hind foot of the type, taken from the 

 dry specimen, is G6. Four adults from Lake Clark and Cook Inlet, 

 Alaska, measured in the flesh, average: Total length, 533; tail vertebrae, 

 228; hind foot, 69.7. Skull of type: Basal length, 60; zygomatic breadth, 

 38.3; palatal length, 38.3; length of nasals, 20.9; breadth of nasals, 9.2; 

 alveolar length of upper molar series, 14.4. 



Remarks. — Fiber z. zalophus is a well marked form easily separated 

 from spatulatus by a niimber of constant characters. It ranges from the 

 Alaska Peninsula to the Cook Inlet region. 



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