WILLIAMS.] 
EAUNAL DISSECTION OF THE DEVONIAN. 
95 
there are 23 more named with a query, and 31 entries in whieh only 
generic or more general identification was made. Of this total of 65 
species 27 species are also listed in the faunules of the Hamilton 
formation; they are given in Table XXVI. 
Table XXVI.— Species of the Tropidoleptus ran' iki his fauna occurring above 
the Oneonta sandstone in eastern New York. 
1. Amboceelia umbonata. 
2. Atrypa reticularis. 
3. Camarotcechia congregata. 
4. Chonetes scitulus. 
5. C. setigerus. 
6. Coleolus tenuicinctum. 
7. Cyrtina hamiltonensis. 
8. Grammysia bisulcata. 
9. G. circ/ularis. 
10. G. subarcuata. 
11. Leda di versa. 
12. Leiopteria bigsbyi. 
13. Loxonema delphicola. 
15. Lunulicardium fragile. 
16. Cypricardella bellistriata. 
17. C. complanata. 
18. C. gregaria. 
19. Nuculites cuneiformis. 
20. N. oblongatus. 
21. Orthis (Schizophoria) impressa. 
22. O. undulata. 
23. Palaeoneilo plana. 
24. P. constricta. 
25. Spirifer granulosus. 
26. Stropheodonta deniissa. 
27. Tropidoleptus carinatus. 
.14. L. hamiltoniae. 
Five of these (Nos. 1, 20, 24, 25, 27) are found in the list of the 12 
most dominant species of the typical Hamilton formation of eastern 
New York (p. 51). 
Of this list, 23 are also reported from the underlying Ithaca forma- 
tion The 5 not listed by Prosser in the Ithaca are— 
Stropheodonta deniissa. 
Orthis (Schizophoria) impressa. 
Grammysia circularis. 
Loxonema delphicola. 
L. hamiltoniae. 
Both Stropheodonta deniissa and Schizophoria impressa are in the 
Ithaca formation of Ithaca. Their omission from the Ithaca formation 
in the eastern counties may be only accidental, but they certainly do 
not furnish means of discrimination between the Ithaca and Chemung 
formations. 
There are also eight species which are not recorded in the Hamilton, 
but are recorded in both the Ithaca and Chemung lists of the same 
region. They are recorded in Table XXVII. 
Table XXVII. — Species in " Chemung''' list which arc also in Hie Ithaca, hut not 
in the Hamilton formation. 
1. Camarotcechia stephani. 
2. Cyclonema multilara. 
3. Grammysia elliptica. 
4. G. nodocostata. 
5. Leiorhynchus mesicostale. 
6. Delthyris mesicostalis. 
7. Spirifer rnesistrialis. 
8. S. pennatus posterus. 
Paloeoneilo filosa might be added to the above table. It occurs in 
the "Chemung" list and in the Portage, but not in the Ithaca or 
Hamilton lists. 
Two of the species in Table XXVII — Spirifer rnesistrialis and 
Delthyris mesicostalis — are among the characteristic and dominant 
species of the standard Spirifer dis/ a nctus fauna (see Table XXI). So 
far as their evidence bears upon the case, their appearance in 1 lie 
