. Whydr Whydl Cmb Text-fig. 82. Abylopsis tetragona. The two nectophores locked rigidly together as in life. Xf2. Since the ' Manihine' catches appear to be some of the first records of Siphonophores from the Red Sea it was thought worth while to compare the absolute abundance per unit volume of water of this species in the Red Sea ('Manihine' records), in the Mediterranean ('Thor' records) and in the warm tropical Atlantic ('Meteor' records). Bigelow & Sears (1937) went into the question of the last two in some detail. Here I need only give the comparable figures and repeat the caution ab
. Whydr Whydl Cmb Text-fig. 82. Abylopsis tetragona. The two nectophores locked rigidly together as in life. Xf2. Since the ' Manihine' catches appear to be some of the first records of Siphonophores from the Red Sea it was thought worth while to compare the absolute abundance per unit volume of water of this species in the Red Sea ('Manihine' records), in the Mediterranean ('Thor' records) and in the warm tropical Atlantic ('Meteor' records). Bigelow & Sears (1937) went into the question of the last two in some detail. Here I need only give the comparable figures and repeat the caution about accepting figures based on a small number of open hauls, where the straining efficiency of the net, the 1 Clearly shown in Text-fig. 80.
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