. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 5mm Anterior. BS 2 mm Figure 1. Morphology of antennular region and statocyst of the crayfish Clicnn tlcMiiiflnr. (A) Dorsal view of the basal segment (BS) of the antennule. and the locution of the statocyst opening (SO). The rostrum and eyes have been removed. The position occupied by the rostrum is indicated by dotted lines. (B) Higher magnification of the basal segment (BS) of the antennule showing the dense screen of setae (H) that covers the statocyst opening (SO). (C) The statocyst capsule viewed through a window cut i
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 5mm Anterior. BS 2 mm Figure 1. Morphology of antennular region and statocyst of the crayfish Clicnn tlcMiiiflnr. (A) Dorsal view of the basal segment (BS) of the antennule. and the locution of the statocyst opening (SO). The rostrum and eyes have been removed. The position occupied by the rostrum is indicated by dotted lines. (B) Higher magnification of the basal segment (BS) of the antennule showing the dense screen of setae (H) that covers the statocyst opening (SO). (C) The statocyst capsule viewed through a window cut in the dorsal cuticle of the basal segment (BS) of the antennule to reveal the setae (SS) projecting upwards from the ventral floor (F) of the capsule. The statolith. with which all but the anterior setae make contact, has been removed. linearly with the size of the animal (n = 24: R~ - ; P < : Fig. 3B). To examine the way in which this increase occurs, we counted the number of setae in a group of animals with a basal antennule length of mm (SD = ) ("small") and compared the result with a sample of animals with a basal antennule length of mm (SD = ) ("large"). The results of the survey are shown in Figure 4. A two- factor analysis of variance on the data testing for setal field type and size of animals showed that the large animals have significantly more setae in each field than the small animals (F -- P < ). the number of setae in the three fields is significantly different (F(2 50) — P • ). and the si/.e of the difference varies between fields. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lilli
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
