This species is closely allied to Atergatopsis granulatus Alph. M. Edw. and to Atergatopsis Lucasii Montr. It has the physiognomy of the former, hut the whole surface of the carapace is uniformly covered with close minute granules, which are somewhat greater on its lateral regions than in the midlle; there are also a few short stiff hairs on the carapace and on the legs. Front bilobed, formed by two rounded lobes which are very granular and separated by a rather deep incision. Interregional grooves very shallow, faintly marked. Latero-anterior margin with three small granular teeth, one on the middle, the second at the posterior edge of the margin, the third between the two other ones. The pleural lobes and the whole inflected portion of the carapace also somewhat granular, as also the two basal somites of the abdomen which is constituted by 5 segments. The chelipedes are nearly equal; the meropodites covered by the carapace; the outer surface of the carpopodites, and the outer and inferior surfaces of the penultimate joints are very granular, and the inner surface of the claws is less so. The dactylopodite is much granulated at its base, and, just as the immoveable finger, very similar to the same parts of Atergatopsis Lucasii, being armed only with some small teeth. The ambulatory legs are very strong, covered with hair and very rugose and granulated. The Leyden Museum has three specimens of this crab, which have been collected by Mr. G. Schlegel at Amoy in China.