204 



Trans. Acad. Sci. of St. Louis. 



the Chonopectus sandstone being so different in their charac- 

 ters as to probably constitute a distinct, though allied 

 species. The typical form of this species was described from 

 the Kinderhook strata at Kinderhook, Pike County, Illinois, 

 but no statement is made as to what portion of the Kinder- 

 hook series the specimens were derived from. A comparison 

 of specimens from Pike County, Illinois, with those from 

 Burlington, shows them to be identical in character and in 

 mode of preservation. It is possible that this species is 

 characteristic of a definite horizon in Pike County, as it is at 

 Burlington, in which case it may be of value in the correlation 

 of the Pike County section when it is properly studied. 



The fauna of bed No. 5, the upper yellow sandstone, may 

 be directly compared with the fauna of the Northview sand- 

 stone in southwestern Missouri which has been described in 

 Kinderhook Faunal Studies I. The entire Kinderhook series 

 as represented in Greene and the neighboring counties in 

 Missouri,* consisting of the three principal formations, Sac 

 limestone, Northview sandstone and shale, and Pierson lime- 

 stone, must be correlated with the typical Chouteau limestone 

 of central Missouri, the Sac limestone containing a fauna 

 which is typical of the lower Chouteau limestone as described 

 by Swallow. t In the following table the two faunas, that of 

 bed No. 5 at Burlington and the Northview sandstone, are 

 arranged side by side so that a direct comparison between 

 them may be made. Those species in the Burlington 

 fauna which are not known from any other fauna, are marked 

 with an asterisk. 



UPPER YELLOW SANDSTONE AT 

 BURLINGTON. 



Leptaena rhomboidalis 

 Orthothetes inaequalis 



Productus arcuatus 

 *Productus parvulus 

 * Productus morbilUanus 



NORTHVIEW SANDSTONE. 



Zaphrentis sp. undet. 

 Scalarituba missouriensis 



Orthothetes chemungensis ? 

 Schizophoria swallovi 

 Bhipidomella burlingtonensis 

 Chonetes illinoisensis ? 

 Chonetes sp. undet. 

 Productus sp. undet. 



♦ Jour. Geol. 9 : 130-148. 



t Geol. Surv. Mo. I. & II. Rep. (1865), p. 102. 



