. Fig. 46. Ophiura flexibilis, var. crassa, Part of oral side (a) and dorsal side [b); part of arm in side view (c). ventral arm-plates are somewhat shorter and broader, and contiguous on the three proximal joints. The arms also are somewhat more robust than in the 'piicaX flexibilis. Quite exceptionally there may be five, instead of four, arm spines. As the specimen is rather large, 8 mm. diameter of disk, it is quite possible that the differences pointed out are in the main due to age (I have no specimens oiflexibilis of a corresponding size for comparison), and since the differenc
. Fig. 46. Ophiura flexibilis, var. crassa, Part of oral side (a) and dorsal side [b); part of arm in side view (c). ventral arm-plates are somewhat shorter and broader, and contiguous on the three proximal joints. The arms also are somewhat more robust than in the 'piicaX flexibilis. Quite exceptionally there may be five, instead of four, arm spines. As the specimen is rather large, 8 mm. diameter of disk, it is quite possible that the differences pointed out are in the main due to age (I have no specimens oiflexibilis of a corresponding size for comparison), and since the differences are rather unimportant, I do not think it desirable to make this single specimen the type of a separate species,
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
