DESCRIETIONS OF SPECIES. 459 



PLELTROTOMARIA Defrance, 1824. 

 PleijROtomakia? cf. CARBONARiA Norwood and Prattcn. 



1855. PleuTotomaria carbonaria. Norwood and Pratten, Acad. Nat. Sci. Philadelphia, Jour., (2), vol. 

 3, p. 75, pi. 9, fig. 8. 



Coal Measures: Rockcreek, Williamson County, 111. 

 1888. Pleurotomaria carbonaria. Keyes, Acad. Nat. Sci. Philadelphia, Proc, p. 239. 



Lower Coal Measures: Des Moines, Iowa. 

 1891. Pleurotomaria carbonaria. Keyes, Acad. Nat. Sci. Philadelphia, PrOc, p. 253. 



Lower Coal Pleasures: Des Moines, Iowa. 



1891. Pleurotomaria harii. Miller, Geol. Surv. Indiana, Adv. Sheets, 17th Kept., p. 83, pi. 14, figs. 3, 4. 

 Upper Coal Measures: Kansas City, Mo. 



1892. Pleurotomaria harii. Miller, Geol. Surv. Indiana, 17th Kept., p. 693, -pi. 14, figs. 3, 4. 

 Upjier Coal Measures: Kansas City, Mo. 



1895. Pleurotomaria carlionaria. Keyes, Missouri Geol. Surv., vol. 5, p. 138. (Date of imprint, 1894.) 

 Upper Coal Measures: Kansas City, JIo. 



1896. Pleurotomaria harii. Smith, Leland Stanford .Junior Univ. Publ. ; Cont. Biol. Hopkins Seaside 



Lab., No. 9, p. 40. 

 Lower Coal Measures: Conway County, Ark. 

 1896. Pleurotomaria harii. Smith, Am. Phil. Soc, Proc, vol. 35, p. 250. 

 Lower Coal Measures: Conway County, Ark. 



This shell, of which we have one specimen onh', is so small that it seems almost 

 grotesque to compare it with the robust species mentioned above. It has, neverthe- 

 less, much the proportions and markings of PL ? carhonaria and PI. ? I'echwithiana. 

 It is a somewhat more depressed type than either of those mentioned, but in the 

 relative coarseness of its strise it can he compared with the former species rather 

 than with the latter. The height is about 0.5 mm. and the diameter possibly a trifle 

 greater. There ai-e three volutions. The peritreme is highly and regularly convex 

 and marked by a number of subequal revolving stria? which are somewhat finer and 

 more crowded on the lower than on the upper portion of the peritreme. The slit 

 band appears to be situated about medially. 



Locality. — Grand River region, Glenwood Springs (station 3193). 



ACLISINA de Koninck, 1881. 

 AcLisiNA STEVENSiAKA Meek and Worthen ^ 



1866. Turritella ? slevemana. Meek and Worthen, Geol. Surv. Illinois, Rept., vol. 2, \>. 382, pi. 27, iigs. 

 8-8a. 



Upper Coal Measures: North Branch Saline Creek, Gallatin County, 111. 

 1895. Adixina sterenxana. Keyes, Missouri Geol. Surv., vol. 5, p. 202. (Date of imprint, 1894.) 



Upper Coal Measures: Kansas City, Mo. 



One of the species occurring in the gasteropod fauna found near Glenwood 

 Springs is an elongate, turreted shell with three or four revolving striaj, which 



