GEOLOGICAL SURVEY OF THE TERRITORIES. 299 



16. Goniobasis nodulifera, Meek, 12 ; Barrel Springs, Wyoming. Miocene. 



17. Goniobasis Carteri,. Conrad ; Barrel Springs, Wyoming. Miocene. 



18. Goniobasis chrysalis, Meek ; Sulphur Creek and Bear River, Utah. Eocene. 



19. Goniobasis Simpsoni, Meek ; Fort Bridger, Wyoming. 



20. Pyrgulifera liumerosa, Meek ; Sulphur Creek, Bear River City, and Parley's Park, 

 Utah, and Gilmore, Wyoming. Eocene. 



21. Viviparus paludinwformis, Hall? (sp.) 13 , Henry's Fork, and Green River, Arctic 

 Springs, &c, Wyoming. Eocene. 



22. Viviparus Conradi, M. and H. ; Sulphur Creek, on Bear River, Utah. Eocene. 



23. Viviparus? Wyomingenis, Meek, (new species, see description); Henry's and Black's 

 Forks, and Church Buttes. Miocene. 



24. Melanfho ( Campeioma) macrospira, Meek (new species) ; Sulphur Creek, Bear River 

 City, and Parley's Park, Utah. Eocene. 



25. Physa (one or two undetermined species) ; Church Buttes, Utah. Miocene. 



26. Planorbis spectabilis, Meek ; Henry's Fork. Miocene. 



27. Planorbis (undetermined species) ; Church Buttes. Miocene. 



28. Bliytophoms priscus, Meek; Sulphur Creek, Utah. Eocene. 



29. Bythinella? gregoria, Meek (new species, see description); Pacific Springs, 

 Wyoming. Miocene. 



30. Cypris, (undetermined species) ; Fort Bridger and Pacific Springs. Miocene. 



DESCRIPTIONS OF NEW SPECIES AND GENEKA * 



Carboniferous species. 



EDMONDIA ASPENWALLENSIS, (MEEK.) 



Shell ovate, moderately convex • anterior side short and subtruncated, 

 or more or less rounded ; posterior margin rounded ; pallial margin 

 forming a semiovate curve, being more abruptly rounded up anteriorly 

 than behind ; cardinal border rather short, and rounding into the pos- 

 terior outline ; beaks moderately prominent, oblique, only about one- 

 fourth to one-fifth the length of the valves from the anterior margin. 

 Surface marked with more or less regular and distinct concentric ridges 

 and strise. 



Length, 1.40 inches ; height, 1.04 inches; convexity, about 0.70 inch. 



It may possibly have been a variety of this species that was figured 

 by Professor Geinitz under the name Astarte gibbosa (McCoy), in his 

 " Carbonformation und Dyas in Nebraska " (PI. I, Fig. 23), as we know it 

 to occur at the same locality from which his specimen was obtained. 

 His figure, however, would seem to represent a more rounded or shorter 

 and less depressed shell, with a broader posterior outline and more gib- 

 bous beaks. At any rate, the shell under consideration is very distinct 

 from that named by Professor McCoy, and is certainly not an Astarte, 

 as its internal casts show no indications of the hinge characters of that 

 genus, but on the contrary, impressions apparently like those left by the 



tion in the series. These specimens are also extremely abundant, while those of G. chrysalis are rare, 

 and hence it is more probable that the former is the species named in Fremont's Report. 



It is •worthy of note, that the very abundant shell, here referred doubtfully to Professor Hall's species, 

 is exceedingly variable in its ornamentation, some specimens having the vertical costa rather strongly 

 developed on all the volutions, while others have them only on the upper ones ; and on still others they 

 are nearly or quite wanting on all the volutions so as to leave only the finer revolving lines, and yet we 

 see all gradations between these extremes. ' 



12 This is the form figured and described in Fremont's Report under the name Cerithium nodulosum. 

 As it is a true Goniobasis, however, and Doctor Lea had previously described a species of that genus 

 Tinder the name nodulosa, it is necessary to propose a new name for the Utah species. 



13 It is not possible, from the published figure and description of the species called Turbo paludincefor- 

 mis,m Fremont's Report, to decide, with confidence which one of several species of Viviparus and 

 Melantho, now tnown from the tertiary fresh-water deposits of the Green River country, that name 

 was originally proposed for. From the nature of the matrix, however, and its association with the 

 species described under the name Cerithium nodidosum, it is much more probable that the shell I have 

 here referred doubtfully to Viviparus paludinforcemis, is really the form originally described as Turbo 

 paludinceformis, than the less-abundant species of Melantho, from the Bear beds, composed of a different; 

 material. 



* Drawings of these fossils are in course of preparation, to be published along with 

 full descriptions in final report. 



