66 The American Geologist. February, 1900 
cles it seems to be closely related to Etheridge and Carpen- 
ter's genus Cryptoschisona. The plates are very thin and it 
occurs mostly in a crushed condition. As natural casts it is 
occasionally found in cherts of the same horizon. 
CQdaster gracillimus. (Rowley & Hare.) 
Figs. 6-7. Side views of two specimens, natural size. 
Fig. 8. Ventral view. 
This blastoid was figured and described in the Kansas 
City Scientist for July, 1891, and is redrawn here for com- 
parison with Codaster laeviculus. This blastoid occurs spar- 
ingly about the middle of the Lower Burlington limestone, 
associated with Orophocrinus? inopinatus, Granatocrinus exi- 
ij'uus and Dorycrinus unicornis. 
Codaster grandis. (Rowley & Hare.) 
Fig. 9. Side view of specimen, natural size. 
Fig. 10. Ventral view of same specimen. 
Fig. II. Side view of a small individual x 2. 
This fine blastoid was figured and defined in the July 
number of the Kansas City Scientist for 1891 from natural 
casts in chert. The present figures are from specimens pre- 
serving the test, the larger of which is somewhat restored 
from a slightly crushed specimen. The smaller is a poor 
figure of a fine specimen, granatocrinoid in form. The test is 
very thin and the specimens are usually crushed. 
It occurs in the first division of the Upper Burlington 
limestone at Louisiana, Mo., associated with Codaster laevi- 
culus, Granatocrinus? magnibasis and Schizoblastus sayi. 
Granatocrinus calycinus. (nov. sp.) 
Fig. 12. Side view, natural size of a large specimen. 
Fig. 13. Side view of another individual x 2. 
Fig. 14. Ventral view of same specimen, two diameters. 
The base of this little blastoid is flat or slightly concave 
and C|uite large. The three plates are of the usual shape, 
length and breadth of the body about equal and the am- 
bulacra equal to the length of the body. The radials are 
scarcely more than half the length of the body. The deltoids 
or interradials nearly half the length of the body. The am- 
