Archive image from page 385 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 a b Fig. 245. a, Planktoniella sol, and b, Gossleriella tropica, from the Atlantic. (Schiitt.) of diatoms are then produced, which are mainly arctic. Some- times these are almost entirely neritic, and sometimes there is a considerable addition of oceanic species. As often as not it is the species of Thalassiosira and Coscin
Archive image from page 385 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 a b Fig. 245. a, Planktoniella sol, and b, Gossleriella tropica, from the Atlantic. (Schiitt.) of diatoms are then produced, which are mainly arctic. Some- times these are almost entirely neritic, and sometimes there is a considerable addition of oceanic species. As often as not it is the species of Thalassiosira and Coscinodiscus which first appear, and then comes Chcztoceras, C. debile being usually the form found on the west coast, C. constrictum preferring the Skagerrack. In May the predominant form is generally Leptocylindrus danicus. We next get a period in June when the prevailing forms are oceanic, Ceratium longipes at that time attaining its maximum development and characterising the flora. In August the warmth-loving peridineae begin to be more and more numerous, Ceratium fusits> C. furca, and C. tripos being then much in evidence, and continuing to increase until October. Finally, in November we get a comparatively
Size: 1419px × 1409px
Photo credit: © Actep Burstov / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1910, 1912, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, drawing, historical, history, illustration, image, london_macmillan, murray_john_sir_1841_1914, oceanography, page, picture, print, reference, vintage
