X, D, 2 Cowles: Synonyms for Atya molluccensis de Haan 151 



young male or female of the form described by Milne Edwards 

 as Atya armata and that Newport failed to record the tooth- 

 ing on the lower border of the rostrum.* In fact, Milne Edwards 

 states that Atya armata differs from Atya spinipes with regard 

 to the spines on the third legs and in that the merus of Atya 

 spinipes is smooth. (Newport, however, describes it as almost 

 smooth.) If a comparison of the specimens in our collection 

 with the types of Atya armata A. Milne Edwards and Atya 

 spinipes Newport should show that the young are identical with 

 the latter and the old with the former, A. armata and A. spinipes 

 should be considered as identical. 



Finally, it seems probable from the work of Miers,' de Man,' 

 and Bouvier ^ that Atya armata A. Milne Edwards is synonymous 

 with Atya molluccensis de Haan, and from my own observations 

 that Atya spinipes Newport also is synonymous with the latter 

 species. 



* Dr. W. T. Caiman informs me by letter that Bouvier figures the type of 

 Atya armata with teeth on the lower side of the rostrum and that he 

 (Caiman) finds these teeth are present in many if not all the specimens that 

 he has referred to Atya molluccensis and to A. spinipes. 



'Ann. & Mag. Nat. Hist. (1880), 5, 382. 



* Zoologische Ergebnisse einer Reise in Niederlandish Ost-Indien (1892), 

 2, 357. 



'Bull. Sci. France et Belgique (1905), 39, 113. 



