. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 136 DISCOVERY REPORTS those of a specimen with cirri of long segments. The cirrus Ui is of 52 segments and is nearly 75 mm. long. The first three segments are short, the fourth is longer than broad; the fifth and sixth are nearly twice as long as broad, the seventh to about the twentieth or twenty-fifth twice as long as broad. The remainder gradually decrease in length until the most distal are as broad as long. In the segments following the first ten or so the distal edge projects slightly on t
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 136 DISCOVERY REPORTS those of a specimen with cirri of long segments. The cirrus Ui is of 52 segments and is nearly 75 mm. long. The first three segments are short, the fourth is longer than broad; the fifth and sixth are nearly twice as long as broad, the seventh to about the twentieth or twenty-fifth twice as long as broad. The remainder gradually decrease in length until the most distal are as broad as long. In the segments following the first ten or so the distal edge projects slightly on the dorsal side; the projection is most marked, but not Oo. Fig. I. Piomachociiims kcrguelensis. aj_2, long and short cirri of a specimen with cirri of short segments, X 1-25. a3_4, the same of a specimen with cirri of long segments, x 1-25. b, distal segments of a short cirrus, X9. Strong, in the distal segments. All but the basal segments are compressed from side to side, the distal most strongly. The small apical cirrus of the same specimen, a,, is of 24 segments and 15 mm. long. The basal segments, the first two or three, are broader than long; the proximal are longer than broad but not nearly so much so as in the long cirri. The distal segments are as broad as long and have the dorsal projection more strongly developed and more keel- like than do those of the larger cirri. The more elongated cirrus, from another specimen, shown in Fig. i (jg, is of 51 seg- ments and nearly 100 mm. long. The first two segments are broader than long, the third. 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 Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
Size: 868px × 2880px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
