. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO, 13 COE : REVISION OF THE NEMERTEAN FAUNA 249 The Peruvian littoral fauna is evidently more closely similar to that of Chile and Patagonia than to the tropical zone on the northward, presumably because of the colder southern waters which flow northward adjacent to the coast. The entire region south of Ecuador would thus comprise a sixth faunal zone. The collections of the Allan Hancock Expeditions included the south central and southern of these 5 faunal zones and the coast of Peru. The known southern range of a conside
. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO, 13 COE : REVISION OF THE NEMERTEAN FAUNA 249 The Peruvian littoral fauna is evidently more closely similar to that of Chile and Patagonia than to the tropical zone on the northward, presumably because of the colder southern waters which flow northward adjacent to the coast. The entire region south of Ecuador would thus comprise a sixth faunal zone. The collections of the Allan Hancock Expeditions included the south central and southern of these 5 faunal zones and the coast of Peru. The known southern range of a considerable number of species has been thereby greatly extended. For the reasons stated above, however, the species of all zones will be grouped together into a comprehensive list which will give also the geographical distribution of each species as far as at present known. Table 1 will indicate the numer of species of each of the genera which have been found in each zone up to the year 1939. In the geographical distribution as given for each species specific localities, if numerous, will be indicated only by the limits of the known range. Bibliographic references to species described previous to the publi- cation of the monograph of 1905 will not be repeated in the literature list to be found at the end of this report. In the synoptic keys which are given for the determination of families, genera, and species, only those groups and species are included which are known to be represented on the North Pacific coast from Ecuador to the Arctic Ocean. Hence, such of the Peruvian species obtained by the Allan Hancock Expeditions as are not also known to occur north of the equator are included only in the descriptive lists of 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 not perfectly resemble the original Allan Hancock Foundation. Los Angeles,
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