. The Canadian naturalist and geologist. Natural history -- Periodicals. « ^11^^^ â. Fig. 2. Fig. 3. When placed in shallow water, just covering the body, the creature used its flat abdominal swimming feet, and though the impression made was very faint, and not readily observed under water, it was obviously very different from those before men- tioned, agreeing with them only in the lateral and median grooves, while between these were series of furrows extending ob- liquely from each side of the middle groove, and resembling ripple marks. (Fig. 8.) These were produced by the sand swept up by
. The Canadian naturalist and geologist. Natural history -- Periodicals. « ^11^^^ â. Fig. 2. Fig. 3. When placed in shallow water, just covering the body, the creature used its flat abdominal swimming feet, and though the impression made was very faint, and not readily observed under water, it was obviously very different from those before men- tioned, agreeing with them only in the lateral and median grooves, while between these were series of furrows extending ob- liquely from each side of the middle groove, and resembling ripple marks. (Fig. 8.) These were produced by the sand swept up by the swimming feet. The appearance was not unlike that of the im- pressions found by Dr. Wilson in beds containing protichnites, and recently described by Sir W. E. Logan in this Journal, under the name Climactichnites, except that in the track of Limulus the lateral and medial lines are furrows instead of ridges. The supposition in respect to CUmacticJmites has been, that it is possibly the track of a gasteropod, or of an annelide; but my re- cent observations of Limulus show that it mai/ have been pro- duced by a crustacean moving by broad swimming feet, having a median notch like that in the largest pair in Limulus. To pro-. 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 Natural History Society of Montreal. Montreal, Dawson
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