Sexuality, juvenile 1172 



not functional, juvenile 1172 



Sexually mature females (50%) 1602 



Shallow 108, 1959 



and warm 899 



Shark Point, Fla. 676 



River, N. J. 643 



Sheepshead Shoals, N. C. 1453 



Shelf life/keeping quality 51, 489, 716, 717, 1552 



Shell/shell sizes 5, 23, 35, 50, 101, 117, 159, 162, 302, 371, 401, 404, 

 520, 521, 524, 800, 1352, 1375, 1423, 1430, 1471, 1666, 1912, 2211, 2230 



activity 47 



, apparatus to measure and record 1107 



, adjacent to 161 

 and mud areas 1267, 1273 

 sand 34, 35, 36, 1335 

 rock 1486 

 , aragonite 1006 

 blisters, nereid 1784 



breakage 504 





breaks in 152, 



415, 1182 



broken 1108, 



2021 



cavity volume 94 





- egg i 



production ratio 



closing 571, 



2007 



closing at low tide 



1432 



mechanism 



877 



collecting 939 





collector 1901 





color of 108 





composition of 



1912 



cross- sections 



2155 



94 



damaged extensively 457 

 , dead 824 

 , density high 719 

 , of 538 



deposition 632, 849, 1176 

 r of carbonate in 609 



takes place at night 1182 



destruction 516 

 , dissoconch 1174 



dissolution 360, 403, 688, 1176 

 , draw into 153 

 , drawing of 650 

 , dropping of 101 



earthy 425 

 , edge of 374 



eroded 522 



802 





