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Archive image from page 804 of The depths of the ocean;. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceange00murr Year: 1912 GENERAL BIOLOGY 749 cephali). We see from Fig. 533 that about 200 individuals of this group were taken by us, belonging to some 20 species, and I have represented in Chapter III. some of the most peculiar new forms. Like most Atlantic fish-larvae these forms are difficult to classify, because our knowledge of the different
Archive image from page 804 of The depths of the ocean;. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceange00murr Year: 1912 GENERAL BIOLOGY 749 cephali). We see from Fig. 533 that about 200 individuals of this group were taken by us, belonging to some 20 species, and I have represented in Chapter III. some of the most peculiar new forms. Like most Atlantic fish-larvae these forms are difficult to classify, because our knowledge of the different developmental stages is deficient, and also because these larvae pass through a remarkable metamorphosis before assuming the ultimate shape of the adult. In a number of cases we are therefore quite ignorant as to what larval forms develop into O 250 Youngfish Fig. 544.—Distribution of Young Fish. the various known species belonging to the group of Apodes. Our material is being examined by Einar Lea, and will prob- ably help to clear up some of the difficulties mentioned above. The stages belonging to Gastrostomus bairdii (repeatedly mentioned in Chapters III. and IX. ; see Fig. 83, a, p. 97) form a very interesting series, the stages a and b (see Fig. 545) obviously being the transition stages between leptocephalus and adult; figure a plainly exhibits characters peculiar to the leptocephalus as well as to the adult, and evidently forms a more advanced stage of the transition. Another interesting transition stage in leptocephali is exhibited by the form repre-
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