. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 246 Mr, J. R. Tosh on an Abnormal Crab. part of the fourth, and the tip of the sixth being visible above the ventral part of the carapace. The first joint alone was normal in size, the next two were a little less than normal, the next two five times and the last two six times less than normal. The dactylopodite was not opposable to the beak of the protopodite, but curved downward into the branchial cavity as a more or less rigid process. It had apparently taken the direction o
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 246 Mr, J. R. Tosh on an Abnormal Crab. part of the fourth, and the tip of the sixth being visible above the ventral part of the carapace. The first joint alone was normal in size, the next two were a little less than normal, the next two five times and the last two six times less than normal. The dactylopodite was not opposable to the beak of the protopodite, but curved downward into the branchial cavity as a more or less rigid process. It had apparently taken the direction of least resistance. It bore no serrations. The same blackish hue occurred at the tips of dactylopodite and protopodite as in those of the functional chela. All the arti- culations in the limb were more or less immovable. The specimen was an average-sized female, and, to judge from the state of the ovaries, which were nearly ripe, had suffered very little from the condition of the claw. In the figure the dotted line represents the posterior edge of the shell, which has been removed to show the limb. It may be supposed that at the last moult this chela had been injured in some way, probably a few joints knocked off, and that, before it was restored, the shell had overgrown and imprisoned it: certainly it has never been functional. Srd mxpd. dact. iBt walking. Richard describes a number of cases of abnormality in crus- tacean appendages. These fall into two classes : the first. 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 London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
