80 NEW YORK STATE MUSEUM 



of the same species, while in Germany, with similar zigzag bands 

 of the original color. They are associated there with gastropods 

 (N atica subcostata), also bearing color markings. In 

 the same note Marsh also states that in several instances he had 

 found " distinct traces of the original color, arranged in delicate 

 cancellated patterns " on " cephalopods from the Trenton limestone 

 of New York, especially Endoceras proteiforme 

 Hall." He further records " indications of color markings " in 

 " Orthocerata from the Hudson and Niagara limestones of Illinois 

 and Iowa." 



Barrande has figured and described some fine examples of color 

 markings in Paleozoic cephalopods, a fact that seems to have been 

 entirely overlooked by the other authors. In volume 2 (pi. 108-244, 

 1866) of his Systeme Silurien de la Boheme, he figures on plate 155, 

 figures 6 and 7, a spotted Cyrtoceras (C . m a c u 1 o s u m) ; on 

 plate 208, figure 21, a Cyrtoceras veteranum with 

 sharp zigzag lines ("chevrons"), and on plate 240, figure 11, a 

 Cyrtoceras decurio with beautiful zigzag transverse 

 bands. All these are from etage E (Silurian) of Bohemia. 



Blake (1882, p. 291) describes Orthoceras annula- 

 t u m Sowerby from the Wenlock limestone with colored longitudi- 

 nal bands. 



Foerste, in a paper just published (1920, p. 212) has a note on 

 " Orthoceras with vertical color bands." He states : 



In a specimen of an unknown species of Orthoceras 

 found at the top of the Plattin limestone at Conn's Ford, vertical 

 color banding is present. The specimen is 22 mm in width. The 

 color bands equal or slightly exceed i mm in width and are i mm or 

 slightly less apart. The color banding is a feature characteristic of 

 the inner layers of the shell and is seen best where the surface of the 

 shell has weathered away. 



Orthoceroid shells with vertical color bands are known also at 

 other horizons. In the Lorraine formation in the river bed west of 

 Weston, Ontario, vertical color bands occur in an Orthoceroid shell 

 22 mm wide, having a siphuncle with nearly spherical segments 

 (Loxoceras ?). About eight .v^tical color bands occur in a 

 width of 5 mm, the width of the color bands and that of the intervals 

 between being about the same. 



In similar species (Loxoceras?), from the Richmond 

 formation at the Clay Clififs on the eastern shore of Manitoulin 

 island, the vertical bands are about i mm in width and are separated 

 by intervals varying from i to 2 mm where the diameter of the shell 

 equals 15 mm. 



