NOTES ON PALEOZOIC CRUSTACEANS 119 



Rhinocaris capsella Hall and Clarke 

 p. 101 



FIG. 



12 An imperfect folded specimen, showing a rounded posterior 



extremity and tlie median plate. x2. 

 Ithaca beds. Hakes ravine, 1 mile north of Pitcher N. Y. 



13 A more complete folded carapace with extremities rounded 



and median plate in position. 

 Ithaca beds. Pharsalia Hook N. Y. 



Rhinocaris columbina Clarke var. livonensis var. nov. 

 p. 100 

 14 A portion of the innier surface of the carapace enlarged to 

 show the diversity of surface sculpture over the valves 

 and median lance plate. The figure also show® the faint 

 lateral carina on one of the valves and the divergent 

 grooves departing from one of the eye nodes'. x3. 



15, 16 Left and right valves of natural size, each bearing a 

 trace of a lateral carina. 

 Hamilton shales. In the Livonia salt shaft at about 350 ft. 



