DESCKIPTIONS OF SPECIES. 467 



1884. Soleniscus (Macrocheilus) palndinsefor.iitif:. White, (Teol. Surv. Indiana, 1.3th Kept., p. 154, pi. .34, 

 fig. 17. 

 Coal Measures: Vermilion County, Ind. 



1888. Macrocheilus paludinnrformis. Herrick, Sci. Lab. Denison Univ., Bull., vol. 4, pi. 11, tig. 10. 

 Coal Mea.sures: Fultonham, Ohio. 



1889. Soieniscus paladimcformis. Keyes, Am. Xat., vol. 23, p. 423, pi. 20, tig. 16. 

 1889. Soleniscus paludinseformis. Keyes, Acad. Nat. Sci. Philadelphia, Proc, p. 308. 

 1891. Soleniscus paludinseformis. Keyes, Acad. Nat. Sci. Philadelphia, Proc, p. 262. 



Lower Coal Measures: Des Moines, Iowa. 

 1895. Soleniscus paludimefonni.'i. Keyes, Missouri ( Jeol. .'^urv., vol. 5, p. 211. (Date of imprint, 1S94. ) 

 Upper Coal Measures: Kansas City, Mo. 



Of this specie.s we have a single representative which, when complete, had a 

 length of about 5 mm. There are .'> volutions visible, the lower one of which 

 is inflated and comprises well-nigh two-thirds of the entire length. The spire is 

 somewhat attenuated. In general character this shell is very close to S. pahidini- 

 form-is Hall, especially the form figured by White under that name. Besides being- 

 very much smaller, however, the Colorado specimen is probably a trifle more slender 

 and has a slightly higher .spire. 



Locality. — Grand River region, (ilenwood Springs (station 2198). 



MiNOTK (iASTEROPODS. 



At several stations collections were made consisting almost entirely of minute 

 gastropods in sufficient abundance to give character to the strata. Although they 

 are too imperfect to be identitiod. and no serious attempt to do so has been made, 

 the circumstance is perhaps worthy of mention. At station 2213 in the Durango 

 quadrangle and 2294 in the Crested Butte quadrangle they occur in chert bands 

 and are quite numerous; at 2296, also in the Crested Butte, in ii limestone 

 conglomerate; at 2269, in the Leadville district, they are common, hut not equally 

 abundant. It is possible that station 2193, near Glenwood Springs, from which a 

 number of minute gastropod forms have been obtained, is on the horizon of one or 

 other of the stations above mentioned. The fossils from the former are in a fair 

 state of preservation and have been provisionally identitied with known species. 



Locality and ho)'izo)h. — San Juan region (stations 2212, 2213); lower and middlf 

 portions of the Herraosa formation. Crested Butte district (stations 2294, 2296): 

 Maroon formation. Leadville district (.station 2269); upper portion of the Weber 

 formation. 



