54 rüDÜl'llTllALMOUS CRUSTACEA. 



outer and inferior surfaces of the penultimate joints are very 

 ffrauular, 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. 



Breadth of carapace of the largest specimen 47 mm. 



Length » » » 30 mm. 



This species is distinguished by the uniform granulation 

 of the carapace and the legs , by the three granulated teeth 

 at the posterior part of the antero-lateral margin and by 

 the form and structure of its pincers. 



2. Atergates frontalis de Haan. 



Fauna Japon : Crustacea , tab. XIV , fig. 3. Alph. Milne 

 Edwards, Nouv. Arch, du Mus. I, p. 238. 



Of this species the carapace alone has been described by 

 de Haan. The Ley den Museum is now however in the 

 possession of a wholly entire specimen of an Atergates , 

 collected at Amoy , which undoubtedly belongs to Aterg. 

 frontalis de H. This species may be distinguished at once 

 from Aterg. integerrimus Lam. , that lives also in the 

 Japanese seas , by the structure of the upper surface of 

 the carapace and the legs. The carapace of Aterg. integer- 

 rimus being almost everywhere smooth, at least on its 

 anterior half, it is in Aterg. frontalis de H. very rugose 

 and furrowed by the very deep interregional grooves 

 that are not found in A. integerrimus , and also by numerous 

 depressions and punctate rugosities. 



Notes froua the Leyden IMuseum. 



