Host specificity 180 



Hosts, experimental intermediate 321, 326 



for syrnbioses 2094 



, paratenic 321 



Hours fished 422 



per day per man 956 



Houseboat "Walrus" 1244 



Household characteristics - 1365 



Housing 1770 



How to cook clams 1417 



Hudson River, N. Y. 927, 1448 



Human amnion cell line 464, 1628, 1631 



cells 2203 



showed little degeneration 1631 



consumption, unsuitable for 1448 



health hazard, not a 228, 235 



Humans 852 



, most hazardous to 344 



, symptoms in 1205 



Humber estuary/Humber River, England 92, 824, 1242, 1324, 1342, 1463 



Humboldt Bay, Calif. 426, 771, 1164 



Humping reflex 815 



Hunterston Sands, Scotland 84 



Huntington/Huntington Bay /Huntington Harbor, N. Y. 549, 1522 



Hurricane Agnes 634, 803, 1180, 2143 



barriers will not affect clams through changes in sedimentation 1743 



Camille 600, 858 



, damaged by 1774 



damage 1870 



Hurricanes 40, 81, 337, 357, 658, 803, 1961, 2047 



Husbandry (see also aquaculture) 133, 550, 557 



Hyalinocytes 322, 327, 596, 1226, 2164 



Hyaluronidase, testicular 845 



Hybridization 133, 1283, 1287, 1290, 1291, 1295 



Hybridize in the laboratory 1278, 1280, 1281, 1286 



Hybrids 35, 96, 122, 222, 230, 341, 476, 676, 799, 1244, 1270, 1271, 1274, 1275, 



1276, 1277, 1282, 1291, 1292, 1294, 1483, 1562, 1563, 1564, 1753, 2045, 2047 



should have at least half the northern species in the pedigree 1291 



Hydrocarbon, aromatic 173 



contamination, persistence of 170 



content 174 



fraction, aromatic 683 



Hydrocarbons 68, 170, 173, 174, 564, 1788, 2068 



, different 170 



, saturated 173 



, total 1341 



Hydrodynamic conditions 102 8 

 Hydrogen ion equilibria 1547 



718 



