450 Rouncly — Color Markings of Carboniferous Gastropods. 



viduals the color is an intense shining black, in some a 



purplish-black, in others a dull, faded purple." 

 1896. White, Theodore G., New York Acad. Sci., Trans., 



vol. xv, p. 85, foot note. 



Jlolopea symmetrica from Trenton limestone of New 



York. "Two of the specimens of this species 



preserve the original shell material and one the irrides- 



cent lustre of the pearl." 

 1906. Raymond, Percy E., The Nautilus, vol. xix, p. 101, 



two text figures. 



Two specimens of Straparollina harpa from the 



Lower Ordovician of New York, which show lines of 



original color markings and possibly the original color. 

 1908. Raymond, Percy E., Carnegie Mus. Annals, vol. iv, p. 



212, pi. 53, fig. 13 ; pi. 55, figs. 16 and 17. (Cbazy 



formation.) 



Jlolopea harpa here described are the same two 



specimens mentioned in The Nautilus in 1906 by the 



same author under the name of Straparollina harpa. 

 1908. Greger, Darling K., this Journal (4), vol. xxv, p. 313, 



7 text figs. 



Cranaena morsii, Devonian, brachiopod which 



retains original color markings. Professor Greger 



mentions in his paper that Professor Kayser records 



the retention of color markings in a Devonian rhyn- 



chonelloid, but I have not been able to locate this 



article. 

 1912. Girty, George H., this Journal (4), vol. xxxiv, p. 339, 



pi. 1, figs. 9-11. 



Naticopsis picta here described is a Mississippian 



shell retaining zigzag color markings. 



DESCRIPTION OF PLATE III. 

 Glyptobasis marshalli n. sp. 

 Fig. 1. Apertural view showing smooth side and revolving striae on base. 

 Fig. 2. Base of same specimen. • 

 Fig. 3. Outline view of same specimen, natural size. 

 Fig. 4. Specimen showing the most regular color bands. 

 Fig. 5. Specimen showing alternation of persistent bands with small dots 



of color. 

 Fig. 6. Outline view of 5, natural size. 

 Fig. 7. Specimen showing the color bands varied and interrupted. 



Holopea proutana Hall. 



Fig. 8. Specimen showing the six color bands on last whorl. 



Fig. 9. Base of same specimen. 



Fig. 10. Apertural view of same specimen. The second band is hardly 

 visible on this side of specimen. 



Fig. 11. Specimen in which only the fourth band shows. 



Fig. 12. Specimen showing color bands* on last two whorls. A dark thread- 

 like color band is seen in tipper part of third band. 



Fig. 13. Another specimen in which a light-colored thread-like line is 

 shown in the upper part of fourth band on both of the last two 

 whorls. 



All specimens figured are from the Spergeu limestone, near Stinesville, 

 Indiana, and all figures save 3 and 6 are enlarged four diameters. 



