Ptili. 824 



Ptilichnus anomalus, Hitchcock Ichthyology Mass., 1858^. 



Iriad f ^ 









^' ^ 





f ,-^- 



V 





f t 





page 145, plate 25, fig. 1 (only a third of it) here given to show 

 the very peculiar mode of progression of the unknown crea- 

 ture, perhaps a fish, either in very shallow water or on the wet 

 muddy shore of the ancient estuary of the Connecticut river 

 valley. (Living fish of the genus Calichthys^ at Surinam, will 

 move pretty freely over a dry floor, using their fins as legs. 

 J. Wyman.) Turners Falls, Mass. Trias. 



Ptilichnus hydrodromus, Hitch. {Ichthyfipodolites^ Burk- 

 land, Phil. Mag. 1844.) Ich. Mass. 1858, p. 146, pi. 26, fig. 5. 

 Trias. 



Ptilichnus pectinatus, Hitch. Ich. Mass., 1858, page, 146, 













,.* ? 



/^^. . 





pl. 25, fig. 9, doubtfully considered an animal track, perhaps 

 merely the effects of water motion. (Hitchcock). Turner's 

 Falls, Mass. Trias. 



Pilocarpus hicornutus. See Cardiocarpus bicornutus. 

 XIII. 



Ptilodictya acuta, Hall. Geology of Canada, 1863, page 

 lic^ _^^,^0^ l^S, fig. 121, from the Trenton limestone forma- 

 J^ tion. II G. 



Geol, Can 



