INDEX. 



201 



Pago. 



Semeeostomites zitteli, description of 70 72 



figures of 71,182 



Siliceous nodules containing fossil medusa?, discov- 

 ery of.. ix.3 



character and occurrence of 3-4 



lithologic character of 11-1*3 



mode of occurrence of 13-14 



chemical character of 14 



microscopic character of. 12-14 



Silicification of niedusa?, mode of 15-21 



Sorby, H. C, cited on sources of silica in oceanic 



waters __ _ 18 



Sollas, W. J., cited on solution and redeposition in 



oceanic waters 18-20 



Spatangopsis eostata(=Medusina costata), descrip- 

 tion of.. 49-54 



"Star cobbles" containing fossil medusa?, discov- 

 ery of is. 3 



Page. 

 "Star cobbles" containing fossil medusa?, character 



and occurrence of _ . 3-4 



lithologic character of. _ 11-13 



mode of occurrence of - 13-14 



chemical character of 14 



microscopic character of 12-14 



Stokes. H. M., analyses by 14 



Sweden, fossil medusa? of 47-65 



TVrell, O. M., cited on Eophyton. --- 59 



Trachynemites deperditus I Medusinadeperdita), 



description of 91-93 



Trails and markings, figures of casts of 176, 17s. ]sn 



Trianisites cliff ordi 66 



Wallich, G. C, cited on sources of silica in oceanic 



waters - - 18 



Zittel. Karl, aid by.. ix 



cited on imprints of medusa? in Cretaceous 



rocks 98 



