104 INVERTEBRATE PALEONTOLOGY. [WHITE. 



236. Viviparus plicappressus White. Black Buttes, Wyoming. De- 

 scribed on a following 1 page. 



237. Viviparus trocliiformis Meek. West base of Mu-si-ni-a Plateau, 

 tain, 1,000 feet below its summit. 



238. Viviparus trochiformis var. Associated with No. 337. 



239. Viviparus paludincBformis Hall sp. Various localities. (See Nos. 

 248, 260, and 266, and also general remarks on page 85.) 



240. Tidotoma Tlwmpsoni White. Black Buttes, Wyoming. Described 

 on a following page. 



241. Leioplaxf turricula White. Black Buttes, Wyoming. Described 

 on a following page. 



LOWER GEEEN EIVER GROUP. 



242. Unio Shoslionensis White. West side of Snake River, six miles 

 north of Junction Mountain ; cliffs four miles northwestward from the head 

 of Vermilion Canon and Dry Mountains, Northwestern Colorado. Described 

 on a following page. It occurs also in the Upper Green River Group. (Sec 

 No. 249.) 



243. Unio ?, Two miles east of Lawrence Station, Wyoming. 



Base of the group. 



244. Spliarium f. Four miles northeastward from the head of 



Vermilion Canon, Northwestern Colorado. 



245. Planorbis Utaliensis Meek. West side of Snake River, six miles 

 north of Junction Mountain, Northwestern Colorado. It occurs also in the 

 Bitter Creek Group. (See No. 222, and also general remarks on page 85.) 



246. Helix riparia White. Eight miles below Green River Station, 

 Wyoming. Described on a following page. 



247. Goniobasis tenera Hall sp. Various localities. (See Nos. 231, 

 259, and 265, and also general remarks on page 85.) 



248. Viviparus paludinceformis Hall sp. Various localities. (See Nos. 

 239, 260, and 266, and also general remarks on page 85.) 



UPPER GREEN RIVER GROUP. 



249. Unio Shoslionensis White. Henry's Fork and Alkali stage-sta- 



