352 The American Geologist. juuc. 1901. 
Amplexus radigerus, n. sp. 
Plate xxviii. 
Fig. 39. — Side view of the type, natural size. 
Coral elongate, differing liitle in cross diameter, except where the 
stem makes rapid contractions. 
Shape irregular, often abruptly bending to the right or left. The 
cup is not clean in the type specimen, but is apparently deep and the 
septa poorly developed, but seen on the surface as fine crowded lines. 
On the inner side of the surface wall they are more pronounced than in 
A. verniicularis. Cross lines of growth and ridges of distortion gird 
the exterior. Tabulae at irregular intervals cross the central area. A 
few short radicular appendages occur along the lower half of the coral. 
Another Amplexus, probably distinct, with little greater diameter 
than this form, is often found several inches long and apparently in- 
complete, alternately contracted and expended, but without radicular 
appendages. 
This coral conies fron: the third division of the Lower Bur- 
hngton hmestone at Louisiana, Mo. 
Coleophyllum? greeni, n. sp. 
Plate xxviii. 
Fig. 53. — Side view of a nearly perfect coral, natural size. 
Figs. 54, 55, 56-. — Side views of other specimens, weathered in 
such a way as to show structural features, natural size. 
This coral is elongated, curved and without septa (lamellae). The 
cup is shallow. The entire fossil is made up of a series of invaginated 
tabulae, as seen on the weathered specimens. The outer surface is 
comparatively smooth except near the calix where the edges of the 
tabulae remind one somewhat of Cystiphyllum. 
The specimens are from the L^pper Chouteau Hmestone. 
three miles northeast of Ciu'ryville, Mo. 
Aulopora longi, n. sp. 
Plate xxviii. 
Fig. 57. — Side view of a large stem, natural size. 
This is a slender, elongate species. The tubules are very long wiih 
the oral portion rapidly expanding. Each coralite comes off from the 
one below it in such a way as to give a zigzag appearance to the stem. 
This species is probably attached at the base but never along 'the side. 
It occurs hoth in the Lower and the Upper Burlington lime- 
stones at Louisiana. Some specimens are quite two inches long-. 
The specimen figured is from the base of the L^pper Burling-ton 
limestone. It is a much more delicate species than A. gracilis. 
We are glad to name this coral for Mr. F. R. Long, of Louisi- 
ana, Mo. 
Aulopora amplexa, n. sp. 
Plate xxviii. 
Fig. 58. — View of a colony surrounding joints of a Platycrinus 
stem, natural size. 
