MAY, 1903. A LIST OF MAMMALS ELLIOT. 179 



thickly covered by Pinus contorta; farther inland it is overgrown with 

 spruce, Picea sitkensis^ fir, Pseudotsuga taxifolia, and cedar Thuya 

 gigantea." Here was obtained the wood -rat, Teo'noma f. apicalis. 

 Proceeding northward, Florence on the Lower Sinslaw Rtver was the 

 next place visited. "The Lower Sinslaw," says Mr. Heller "flows 

 through a sandstone region cut into numerous low, rounded hills. 

 The coniferous forest which clothed the lower hills near the mouth 

 has been removed by fire many years ago. The blackened stumps 

 of this forest are still standing, but the country has been overgrown 

 with alders, Alnus oregonus. A few firs still remain along the streams 

 and in the canons. The river is subject to tide for about twenty miles 

 from its mouth. Tide-flats, tide-swamps, and lagoons are numerous 

 along the lower part of the river near the mouth, and between the 

 sand-dunes and the hills, lakes are numerous. Near the coast 

 the scrub pine, Pinus contorta, is the commonest tree ; farther inland 

 and about the lakes and tide-water the spruce is predominant. Still 

 farther inland and on the higher ground the Douglas fir and red cedar 

 are the prevailing conifers." Haplodontia pacifica was common here 

 on the north fork of the Sinslaw River, and a series of specimens was 

 procured and also the new form of muskrat, I have named F. 

 occipitalis on account of the unusual formation of the skull. It is the 

 largest known species of the genus. 



Beaverton, type locality of Lepus f. ubericolor, was next visited in 

 order to procure the rare and little known Thomomys bulbivorus, a good 

 series of which was obtained. On account of the peculiar cranial 

 characters of this animal, I have made it the type of a new subgenus. 

 Of Beaverton Mr. Heller writes that it is "near the Columbia River, 

 where the Willamette Valley enters the valley of the Columbia. The 

 region is low and rolling, but hills are entirely lacking in the immedi- 

 ate vicinity of the town. The timbered land is covered with forests 

 of yellow pine, Pinus jeffreyi, Douglas fir, Pseudotsuga taxifolia, white, 

 oaks, Quercus zarryana, etc. A small stream which was formerly noted 

 for its beaver-dams flows through the town. The soil is chiefly a 

 heavy black adobe except on the higher parts where it is largely clay. 

 The region is evidently Transition in the character of its vegetation as 

 shown by the presence of the yellow pine and white oak. The beaver 

 which was formerly quite abundant is now nearly or quite extinct." 

 A few may still occur about the head waters of small streams. From 

 Beaverton a short trip was made to McCoy, the type locality of 

 Micro/us canicaudus. The place is in "much the same kind of country 

 as Beaverton, but more level and forested. The coast range is about 

 fifteen miles distant. In some places forests of Douglas fir occur, but 



