Specimens, older 2080 



, recent 2080 



Spectraglo green tracing powder coated with krylon 1834 



Spectrof luorometry 1978 



Spectroscopy 2092 



absorption, ultraviolet 2205 



Speed, current 1929 



Sperm 2, 628 



, ability to fertilize eggs 306 



, head of 1084 



, no effect on hard clam 1387 



of a single male 1238 



, stripped 238, 299 



, tail of 1084 



Spermatic hormones 1388 



Spermatogenesis 83, 1106 



, describes in detail with illustrations 1106 



, second period of 1102, 1104 



Spermatozoa 1084 



, functional 1104 



, mature all year 1105 



, ripe 1102 



Spermatozoon 152 



Sphaeroides 281 



Spiders 1976 



Spike-like processes 596 



Spin-labelling techniques 2087 



Spirochaetes 1383 



Spisula (see also skimmer, surf clam) 399, 527, 624, 704, 705, 891, 984, 1008, 

 1248, 1282, 1437, 1438, 1614, 1684, 1802, 2135, 2137 



Spoil disposal 164 



in a few days 1280 



Spoilage 1282 



Sponges 942, 1471, 1942 



Sporangia 452, 455 



Sport shellfisheries (see also recreational shellf isheries) 549, 957, 1087 



Sports fishing, marine 422 



Spot 1904 



Spraying operation 1027 



Spread thinly 205 



Spreading 90 



Spring 93, 94, 99, 102, 310, 337, 601 



, late 280 



Squid 1082, 2112 



Squirts, increase number of 482 



Stabilite no. 9 428 



Stability, regions of different 394 



814 



