Sephadex G-25 chromatography 950, 1082 



_- gel columns 2201 



_-100 columns 1624 



Sera, composition of 372 



Serine 401, 695, 1266, 1954, 2078, 2140, 2225 



Serological relationships 2022 



Serotonin (see also 5HT and enteramine) 14, 210, 704, 947, 1319, 1524, 1848, 1853, 

 1855, 1882, 1973, 1976, 1979, 1981, 1983, 1984 



Serotoninlike activities 1653 



Serum 322, 324, 329, 330, 335, 595, 598, 2095 



, beef 1848 



cholinesterase 1848 



components 2096 



fatty acids 875 



fraction 325, 875, 2060 



hepatitis 1549 



Set, juveniles from natural 665 



_, newly 279, 1020 



_, recently 1700 



, variations in 1112 



, young 276 



Sets 493 



, closure to protect 504 



, excellent 1922 



higher in sand than in mud 964 



, infra-tidal 488 



infrequent 502 



, intratidal 488 



, large 1552 



, natural 1919 



, occasional clam 657 



, sporadic 793 



Setting/settlement 54, 83, 90, 133, 146, 152, 275, 284, 290, 369, 454, 832, 

 1040, 1043, 1122, 1153, 1154, 1917 



began at same time 1118 



behavior 963 



, effect of bottom conditions on 119 3 



infrequent 1112 



intensity variable 638 



, numerical aspects of 1193 



on particle sizes, preference for 965 



, period after 301, 474 



poor 1782 

 , reduce total 189 

 . reduced 620 

 , successful 99 

 time 667 



800 



