NORTHERN AND SOUTHERN KINDERHOOK FAUNAS 623 



19. Avicula strigosa White. The specimens of this species from 

 Kinderhook are all imperfectly preserved, but they seem to show 

 no essential differences from the typical members of the species 

 in the Chonopectus fauna at Burlington. 



20. Pteronites whitei Win. A single very perfect left valve of this 

 species occurs in the collection, and is indistinguishable from 

 the members of the species in the Chonopectus fauna at Burling- 

 ton. 



21. Goniophora jennae Win. This is another Chonopectus fauna 

 species, but it seems to be more common at Kinderhook than at 

 Burlington. The specimens exhibit some variation, but in 

 general they correspond quite closely with the smaller of the 

 two type specimens figured by Weller. 1 



22. Undetermined pelecypod. This species is represented by two 

 specimens of a small Allorisma- or Grammy sia-\ik.e shell, too 

 imperfect for identification. 



23. Sphaerodoma pinguis Win. A single specimen in the collection 

 is apparently identical with this species which was originally 

 described from the Chonopectus fauna at Burlington. 



24. Straparollus sp. undet. A small specimen too imperfect for 

 identification. 



25. Bellerophon sp. undet. 



26. Patellostium scriptiferus White. The specimens of this species 

 from Kinderhook are identical, in all their essential characters, 

 with the typical representatives of the species from the Chono- 

 pectus fauna at Burlington. 



27. Brachymetopus sp. undet. 



The most noticeable feature of this fauna is its striking similarity 

 to the Chonopectus fauna at Burlington, although the total number 

 of species recognized is much smaller, and the most characteristic 

 species at Burlington, Chonopectus fischeri, has not been noticed at 

 Kinderhook. In spite of the absence of this species, however, the 

 fauna can be definitely stated to be equivalent to the fauna of the 

 yellow sandstone at the summit of bed No. 2 at Burlington, and 

 doubtless this yellow sandstone at Kinderhook and the yellow 

 sandstone at Burlington would be found to be a continuous forma- 



1 Loc. cit., Plate 3, Fig. 14. 



