Arch. 



30 



Ardi^Dcyatliiis atlanticns. Walcott. Bulletin, U. S. G. 



S. No. 30, 

 page 73, plate 



2, fig. 1, cross 

 section, and 

 fig. la, long 

 section, of 

 type speci- 

 men in Mus. 



Canadian GeoL Survey (a, the growth with the cup. i prob- 

 ably a foreign body not belonging to the animal.) (See Bil- 

 lings, 1861. Geol. Vt. II, 915; and Pal, Foss. I, 5.)— On plate 



3, figure 1, 

 shows the size 



2a 



\j • 



i L3 A\a I. 



Jkt^s/^e 



of a cross sec- 

 tion, and by 

 a n enlarged 

 drawing, the 

 internal anat- 

 omy of a 

 specimen 

 from L'Anse 

 an Loup, 

 Labrador. 

 Fig. 2a. the 

 same, of a 

 specimen 



from Silver Peak, Nevada. (The other figs, given by Walcott 

 are omitted here.) — Labrador and Nevada. J/. C. 



Arch^ocyatlins billingsi. Walcott, Bulletin 30, page 71, 

 M.C. Pi.3.3£. ~ ; 







