386 A. E. Verrill — Decapod Crustacea of Bermuda. 



the middle two are distinctly larger than the others. The middle 

 four are all rather elongated, and subacute. The posterior lateral 

 tooth is stout, rather curved forward. The others are all nearly 

 equal in size, acute. The merus of the chelipeds has five stout, 

 rather close anterior teeth* and a large posterior distal one, accord- 

 ing to Edwards' figure. The manus has a single distal tooth on a 

 strong carina, at the distal fourth. This species, in respect to its 

 areolation, lateral teeth, and six frontal teeth, is similar to A. Smithiiy 

 but in the latter^^the frontal teeth are blunt and the middle ones are 

 less prominent; it also differs in having the merus of outer maxil- 

 lipeds more prolonged. The chelipeds are shorter and stouter, the 

 merus particularly so; its large posterior distal tooth seems to be dis- 

 tinctive. Personally I have seen no specimens agreeing well with 

 Edwards' figure and description of 1879. 

 30 



Figure m.—Achelous spinimanus, about i^' nat. size; 31, maxilliped, enlarged. 

 After A. M.-Edw. 

 Measurements for ratio of length to total breadth. (Part, A. Sinithii.) 

 Length of cara- Breadth of cara- Eatio of 



to the Chilian species. In that case the Atlantic species should take the name, 

 A. Sinithii, unless there be an earlier one. None of the early writers, before 

 A. M.-Edw. have given a figure of either form, so far as I know. 



* Miss Eathbun, 1901, gives, in her description, only four, as in Gibbesii. In 

 our No. 829, there are four on one side and five on the other. 



