464 Raymond — Trilobite Retaining Color-Markings. 



and other examples which could be cited from Ordovician 

 and Devonian, also show the chocolate tints, so that it 

 seems hardly possible that the constitution of the matrix 

 has anything to do with it. 



There is practically no literature on this question of 

 coloration in the trilobites, but henceforth specimens will 

 probably be scrutinized more closely, and it is hoped 

 more evidence will be produced. Banding of the clean 

 cut sort exhibited by this individual seems not to be 

 especially common among modern Crustacea and one 

 would expect that shadings of one color, mottling, and 

 splashes would be more common among the trilobites. 



The identification of this individual with any described 

 species has not been possible, and it may therefore bear 

 the name of Anomocare vittata sp. nov. 



Walcott 4 has described Anomocare convexa as a com- 

 mon fossil from the Conasauga formation in north- 

 eastern Alabama. This pygidium can not be referred 

 to that species because it has a narrower axial lobe 

 which extends as a very low ridge almost to the 

 posterior border. The axial lobe shows very faintly a 

 pair of rings, and the pleural lobes a pair of ribs which 

 are so inconspicuous that they are not put on the figure. 



The specimen was collected by the writer from the 

 Conasauga shale near Moshat's Cross-roads, 3 miles 

 southeast of Center, Cherokee Co., Ala., during the 

 Shaler Memorial Expedition of 1921. 



Museum of Comparative Zoology, 

 Cambridge^ Mass. 



4 Smithson. Misel. Colls, vol. 57, p. 87, 1911. 



