legs somewhat densely covered with long hairs, tarsi long, slender, compressed, densely haired. Last pair of legs somewhat shorter than the preceding. Abdomen of male of 5 joints subequal in length, 3rd rather narrower than the 1st and 2nd, 4th nearly as wide as the 3rd, last broadly rounded at the end; margin fringed with very short hairs, some longer ones being scattered on the surface. Abdomen of female with slight median ridge along its whole length.

Fulton and Grant have pointed out that the specimens from different localities differ slightly as to the prominence of the obscure teeth on the margin of the carapace, the hairiness of its surface, and the small teeth or tubercles on the wrist and hand of the cheliped of the male. These features were, however, found; not to be constant, and I agree with them in considering all the forms as belonging to one species. Even if it should be necessary for systematic purposes to distinguish local varieties, it would not affect the importance of the fact that the same fresh-water crab is found in several lands now widely separated by sea.