3o6 The American Geologist. November. 1902 
Macrodon cf. cochlearis Winchell. 
Fig. 5. 
Macrodcni cochlearis Winchell, 1863, Proc Acad. Nat. Sci-, Phila. p. 
16; Weller, 1900. Trans. Acad. Sci. St. Louis, vol. 10, p. 90; pi. 3, f. 
15- 
Two single valves of a small pelecypod species were 
found in the Rutland cliff. They correspond quite exactly 
with Weller's description and figure of this species tho' they 
show no more characters than his and the identity of them is 
not therefore certain. 
Myalina ? abstemia n. sp. 
Fig. 6. 
The g-eneric reference of this species is subject to revision. 
Shell rather small twice as long as wide, with beaks nearly 
terminal curved and pointed ; umbones gibbons and 
continued in a high broad umbonal ridge toward the 
posterior ventral margin. Anterior margin narrow ; ventral 
margin anteriorally straightened, gradually increasing in cur- 
vature backward to and around the mid posterior and thence 
somewhat straightened to near the cardinal angle which is 
abruptly rounded. Cardinal line slightly curved and extend- 
ing one-half the shell's length. Aalve deepest about the mid- 
dle, and at that point one-half as deep as wide. A slightly 
concave surface borders the umbonal ridge in front. The 
shell is moderately thin yet marked externally by coarse 
elevated concentric lines, and low concentric plications are 
evident on the interior. Three specimens of left valves only 
were coll-ectd at Humboldt, Iowa. 
Cyathophyllum glabrum Kcyes. 
CyatliophyUiiin glabnnii Keyes, 1894. ]\Io. Geol. Sur., vol. 4. p. 105. pi- 
12, f. 6 a. b. 
This coral is somewhat variable and the species appears 
to be inclusive of and therefore identical with the one which 
has been described from the Upper Kinderhook of Missouri. 
Corallum simple, turbinate, slender, moderately curved 
becoming often long and straightened ; annulated by broad 
folds or smooth ; base alternated, growth in diameter and in 
the number of septa continuing for 10 cm. length and 3 cm. 
diameter. Calyx deeper than wide. Septa 40 to 80 or more, 
