■•') 



* 



NOMENCLATURE OF THE VALVES. 



Figure I. 



CAPITULTJM. 



TERGUM. 



CARINA. 



ROSTRAL TNFRA- CARINAL 



LATUS. 



MEDIAN 

 LATUS. 



LATUS. 



SUB-CARINA. 



Figure II. 



Figure III. 



SCUTUM of LEPAS. 



TERGUM of LEPAS. 



Occhident 



Occluclent JBjjvtf 

 margin. 



F 



Tergo- 

 lateral 



Scutal 



Basal angle 

 or Point. 



Basal margin. 



