. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 154 BuUetin Museum of Comparative Zoology, Vol. 134, No. 5 SALINITY, %o .6 .8 .2 370 .2 4. Fig. 9. Temperature-salinity relationships for North Atlantic Central Water and South Atlantic Central Water and the rela- tionship of these to 200-m temperatures in the southern North Atlantic. significance of the boundary between the equatorial zone and the South Atlantic central gyre. \Miat is the relation of the boundary noted near Collection 807 (cfl. 16°N) to the southern edge of the Sargasso Sea? Re- cent physical de
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 154 BuUetin Museum of Comparative Zoology, Vol. 134, No. 5 SALINITY, %o .6 .8 .2 370 .2 4. Fig. 9. Temperature-salinity relationships for North Atlantic Central Water and South Atlantic Central Water and the rela- tionship of these to 200-m temperatures in the southern North Atlantic. significance of the boundary between the equatorial zone and the South Atlantic central gyre. \Miat is the relation of the boundary noted near Collection 807 (cfl. 16°N) to the southern edge of the Sargasso Sea? Re- cent physical definitions of the Sargasso Sea liave been based on the distribution of superabundances of 18^ water (Worthing- ton, 1959, and Istoshin, 1961). The Sar- gasso Sea so defined, in general finds its southern edge at about 20°N.^' Judging •"' Worthington's and Istoshin'.s Saisasso Seas arc derived by .somewliat different methods, though both are based on the superabundanee of 18° water. The geographieal hniits of their seas con- form quite closely. Winge's (1923) Sargasso Sea, from Worthington's chart, CHAIN crossed this boundary at about 2F-22°N, 45°W (between Collections 810 and 811). Analy- sis of our data by the method of first-plus- last captures gives no indication of a bound- ary here, although the collection lists show that the myctophids Lampanyctus cuprariiis, Lampamjctiis photonotus, and Lepidopha- ncs gaiissi occur primarily in the Sargasso Sea collections (see Table 3). Mehmphaes pumiliis Ebeling is an example of a fish whose range conforms closely to Worthing- based on the distribution of Sargassum and there- fore having semantics on its side, fits the others well enough except that it extends much farther to the east (to .SO^W or more, while the others reach onlv to alxiut 40°W).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may
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