Weller — Kinderhook Faunal Studies. 149 



I. THE FAUNA OF BED NO. 3. 



Bed No. 3 never attains a thickness of more than a few 

 inches, but there are often two distinct bands represented. The 

 lowest of these is an impure limestone crowded with indi- 

 viduals of Chonetes gregarius. The upper one is an impure 

 oolitic limestone. The Chonetes band is apparently persist- 

 ent throughout the area around about Burlington, but the 

 oolite band is often wanting. With the exception of Chono- 

 pectus fischeri, the species which have been recognized in 

 these two bands have in no case been found to be common to 

 both, so it is possible that the two should not be considered 

 as members of one bed; but because of their extreme thin- 

 ness and because the upper band is not always present, it has 

 been thought best to group them together, although the spe- 

 cies from each will be considered separately. 



All the material from the Chonetes band used in the prep- 

 aration of the present paper, has been collected by the writer, 

 while all the material from the oolite band belongs in the 

 University of Michigan collection. Further careful collecting 

 in the field will doubtless increase the number of species 

 from each band. 



Species from the Chonetes band. 

 MOUL.USCOIDEA. 



BRACHIOPODA. 



Chonetes gregarius n. sp. 



PI. XII. f. 2. 



Shell small, transversely suboval, hinge-line a little shorter 

 than the greatest width. Pedicle valve rather strongly con- 

 vex, the fullness extending well out towards the cardinal and 

 lateral margins, so that this portion of the shell is but moder- 

 ately compressed. Brachial valve much flatter than the op- 

 posite one. 



Surface marked by exceedingly tine, radiating striae, from 

 90 to 100 being recognizable upon an average pedicle valve. 

 The characters of the cardinal spines not observed. 



