Weller — Kinderhook Faunal Studies. 51 



M. & G. View of a perfect left valve. — 10, Schizodus aequalis Hall. View 

 of an imperfect left valve. 



Plate IV.— 1-4, Ambocoelia parva n. sp. Four views of two specimens, 

 both pedicle valves. — 5-6, Syringothyris carteri Hall. Views of the cardi- 

 nal area of a large but imperfect specimen, and a small but very perfect 

 brachial valve. — 7, Schizophoria swallovi Hall. View of an internal cast 

 of a pedicle valve, showing the muscular impressions. — 8, Athyris lamellosa 

 L6veill6. View of an internal cast of a pedicle valve. — 9, Dielasma sp. 

 View of an imperfect pedicle valve. — 10, Chonetes illinoisensis Worthen. 

 View of an imperfect pedicle valve. — 11, Athyris {Cleiothyris^) sp. 

 View of a nearly perfect pedicle valve. — 12, Spirifer marionensis 

 Shum. View of a nearly perfect brachial valve. — 13, Bhipidomella 

 burlingtonensis H. View of a nearly perfect pedicle valve. — 14, Creni- 

 pecten laevis n. sp. View of the type specimen — 15, Crenipecten winchelU 

 Meek. Lateral view of a somewhat imperfect specimen. — 16, Ed- 

 mondia burlingtonensis W. & W. View of a nearly perfect right valve. — 

 17, Edmondia missouriensis n. sp. View of the type specimen. — 18, 

 Ptychodesma. of. minor Hall. View of a nearly perfect right valve. — 19, 

 Modiomorpha northviewensis n. sp. View of the type specimen. — 20, 

 Palaeoneilo constricta Con. View of a left valve in which the umbonal 

 region is imperfect, but in which the impressions of the cardinal teeth may 

 be seen. — 21, Palaeoneilo truncata Hall. — View of a nearly perfect specimen 

 preserving both valves. The impressions of the cardinal teeth may be seen 

 anterior to the beaks. — 22, 23, Pernopecten cooperensis Shumard. Lateral 

 views of two different specimens. 



Plate V. — 1-4, Platyachisma missouriensis n. sp. Three views of the 

 type specimen with a tracing of the form of the aperture. — 5, Loxonema 

 sp. View of a somewhat imperfect specimen. — 6, Phanerotinus paradoxus 

 Win. Outlin'-' of an imperfectly preserved specimen. — 7, Porcellia. cf. rec- 

 tinoda Win. View of one of the best preserved fragments from Northview. — 

 8, 9, Tropidodiscus cyrtolites Hall. Lateral and dorsal views of a speci- 

 men in which the margin of the aperture is perfectly preserved. — 10, 11, 

 Euphemus? sp. Lateral and dorsal views of the only specimen observed. — 

 12, Bucania'^ sp. View of an imperfect specimen. — 13, Mourlonia 

 northviewensis n. sp. Lateral view of the type specimen. — 14, Strapar- 

 ollus sp. — 15, Capulus sp. — 16, Orthoceras chemungense Swallow. — 17, 

 Triblocerus digonum M. & W.? View of the outer side of an imperfect frag- 

 ment and an outline of the cross section of a smaller individual. 



Plate VI. — 1, Scalarituba missouriensis n, gen. and n. sp. A fragment 

 of the weathered surface of the sandstone showing the worm burrows. — 



Issued April 22, 1899. 



