. Ctenophores of the Atlantic coast of North America. Ctenophora -- Atlantic Coast; Ctenophora. CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA 53 A. Agassiz, from the Pacific coast of North America. Moser, 1908, 1909, records it from the eastern coast of Japan and also from the Antarctic, Pacific, and Indian oceans. In September, 1910, I visited Newfoundland in order to examine a suflficiently large number of B. cucumis to be assured that it is actually specifically distinct from B. ovata. No differences can be detected in the immature individuals of both species. When mature, however, som


. Ctenophores of the Atlantic coast of North America. Ctenophora -- Atlantic Coast; Ctenophora. CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA 53 A. Agassiz, from the Pacific coast of North America. Moser, 1908, 1909, records it from the eastern coast of Japan and also from the Antarctic, Pacific, and Indian oceans. In September, 1910, I visited Newfoundland in order to examine a suflficiently large number of B. cucumis to be assured that it is actually specifically distinct from B. ovata. No differences can be detected in the immature individuals of both species. When mature, however, some of the side branches from the meridional vessels join with the paragastric. Fig. 12.—Young Beroe cucumis 19 mm. long. From life by the author. Hali- fax, Nova Scotia, September 27, 1910. Peripheral canal-systems of two broad sides are separated one from the other, and there is no ring-canal around mouth. The canal-system is in a stage characteristic of the adult CestidcB. canals in B. ovata, but this does not occur in B. cucumis. Moreover the side-branches anastomose in B. ovata, but m B. cucumis they remain separate one from another (see fig. 76, plate 17.) In B. forskali of the Mediterranean, Pacific, and Antarctic oceans, the fusions between the side branches and the paragastric canals are more frequent than in B. ovata, but I am not sure that the difference is actually a specific one. for it may be of an intergrading 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 Mayer, Alfred Goldsborough, 1868-1922. Washington, D. C. Carnegie Institution of Washington


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