. Bulletin - United States National Museum. Science. Fig. 105.—Peromyscus Skull, a, dorsal view; b, ventral view; r. lateral view. The two have the same coloration, except that /'. merriami is some- what darker, has the light cinnamon color extending down the outer side of the fore limb to the hand, and a laiLr<' pectoral patch of cinna- mon that is usually wanting in P. eremicus. Cranial characters—-The skull (fig. 105) resembles that of P. tr<m'i- cws, except that it is much larger and heavier, with the rostral portion relatively longer, the zygomatic arches wider anteriorly
. Bulletin - United States National Museum. Science. Fig. 105.—Peromyscus Skull, a, dorsal view; b, ventral view; r. lateral view. The two have the same coloration, except that /'. merriami is some- what darker, has the light cinnamon color extending down the outer side of the fore limb to the hand, and a laiLr<' pectoral patch of cinna- mon that is usually wanting in P. eremicus. Cranial characters—-The skull (fig. 105) resembles that of P. tr<m'i- cws, except that it is much larger and heavier, with the rostral portion relatively longer, the zygomatic arches wider anteriorly, and the brain case more elevated. Its larger size serves to identifythe skull of this species at a glance, the two anterior molar teeth about equaling the lateral tooth-row of P. eremicus. In /'. eremicus from Yuma the skull measures nun. in length, I*, merriami measuring 27 mm. In /'. merriami the1 zygomatic arches stand out more prominently and are more nearly parallel to the long cranial axis, because the zygo- matic processes are more produced and angular anteriorly. The pro- a Ten specimens of Peromyscus merriami were taken at Sonoyta and one at Quitobaquita. Large scries of /'. eremicus wen- taken at the same Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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