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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



Table 5. — Summary of measurements for Lopha bellaplicata novamexicana 



Character Valve 



Height (H) J^ 



Length (L) i^ 



/ K 



Width (W) j^ 



Percent valves with H > L LR 



Percent valves with H<L LR 



Percent valves with H = L LR 



Area, inscribing rectangle of valve 

 (A = HXL) |L 



Length, beak to posterior margin 

 (LBP) JL 



Ratio, LBP : L |^ 



Angle of inclination (i) LR 



Percent of specimens with observa- 

 ble attachment scar L 



Height of attachment scar (HATS). L 

 Length of attachment scar (LATS) . . L 

 Area, inscribing rectangle of attach- 

 ment scar (HATS X LATS) L 



Ratio, area, inscribing rectangle of 

 scar : area, inscribing rectangle of 



valve L 



Height of smooth portion of valves 



dorsad to plicae (HSS) ) 



I 



Ratio, HSS:H 3^ 



(R 



Number of plicae (total) : , 



Primary plicae at first appearance.. ) 



1 



Number of plicae at 10 mm. height. . ) 



Number of plicae at 20 mm. height . . ) 



Number of plicae at 30 mm, height. . ) 



/ R 



Number of plicae at 40 mm. height. . ) 



I 



Number of plicae at 50 mm. height • • ) 



I 



Total number of plicae at margin ) 



/R 



