FOSSILS FROM THE CERATOPS BEDS. 133 



Unio couesi, White. Tulotoma thomsoni, White. 



Unio dame M. and H. Campeloma multilineata, M. and H. 



Unio holmesianus, White. Goniobasis tenuicarinata , M. and H. 



Unio brachyopisthus, White. Thaumastus Umnseiformis, M. and H. (?) 

 Sphseriam planum, M. and H. 



The collection also contained two nndescribed species of Unio and a 

 Sphserium that is probably new, besides the following species of plants 

 from the same bed : 



Myrica torreyi, Lx. Aralia notala, Lx. 



Viburnum whymperi, Heer. Aralia, 2 sp. nov. 



Viburnum rotundifolium, Lx. Quercus, n. sp. 



A clay bed at another locality on about the same horizon, one and a 

 half miles southwest, yielded the following plants : 



Alga (?). Cyperus sp. 



Equisetum sp. Trapa (?) microphylla, Lx. 



Asplenium, n. sp. Castalia, 2 sp. nov. 



Salvinia, n. sp. Rhus (?), n. sp. 



The following invertebrates were obtained in a sandstone immediately 

 overlying the plant bed : 



Unio danss, M. and H. Tulotoma thompsoni, White. 



Unio brachyopisthus, White. Campeloma multilineata, M. and H. 



Sphserium planum, M. and H. Physa copei, var. canadensis, AVhiteaves. 



The same fossils, with the addition of a few species, are found abun- 

 dant at many places along Lance creek and on the divide between Lance 

 and Lightning creeks, ranging through 300 or 400 feet of strata. On 

 Lance creek, 4 miles north of U-L ranch, we collected : 



Unio holmesianus, White. Unio sp. 



Unio proavitus, White. 



Still farther north and two miles above the mouth of Lightning creek 

 a bed on near the same horizon yielded a few plants : 



Viburnum whymperi, Heer. Myrica, 2 sp. nov. 



Quercus cinerioides, Lx. Salix sp. 



together with : 



Unio danse, M. and H. Sphserium sp. 



Unio brachyopisthus, White. Tulotoma thompsoni, White. 



Unio (three undescribed species). 



Near the top of the divide between Lance and Lightning creeks and 



