Three more graptolites have been collected recently from the upper part of the Bromide, the uppermost formation of the Simpson group at Rock Crossing in the Criner Hills in Carter County about 8 miles southwest of Ardmore, Oklahoma. Two of the forms are new species of Dictyonema belonging to the Dendroidea, and one described species of Dicellograptus belonging to the Graptoloidea.
One Dictyonema was collected by a student in the geology department, Frances Coleman (Mrs. Tom Coleman), and that species is named in her honor. The other two species were collected by the writer. The Dicellograptus is important for correlation....
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