VOL. XVIII, pp. 9-10 JANUARY 20, 1905 



PROCEEDINGS 



OF THK 



BIOLOGICAL SOCIETY OF WASHINGTON 



FURTHER CHANGES IN CRUSTACEAN 

 NOMENCLATURE. 



BY HARRIET RICHARDSON. 



The changes in nomenclature which have been made by Miss 

 Rathbun * necessitate further remarks in regard to the fate of 

 the isopod genera Idotm Fabricius 1798 and Ligia Fabricius 

 1798. 



It has been pointed out in the paper referred to above that 

 Idotea Fabricius 1798 is preoccupied, Idotea Weber 1795 1 having 

 been previously used for a genus of crabs. It appears that in 

 1796 in the "Index Alphabeticus " to the " Entomologia 

 Systematica emendata et aucta," Fabricius mentions the genus 

 Ichthea S. (p. 86), the letter S referring to the " Supple- 

 men turn." Idothea here is a nomen nudum, the description of 

 the genus appearing two years later with the different spelling 

 Idotea. Idothea in the index undoubtedly refers to Idotea in 

 the ' ' Supplementum ' ' and sisldotheais the correct spelling accord 

 ing to the derivation of the word, it seems more than likely 

 that the omission of the letter h from Idothea in the ' ' Supple 

 mentum ' ' was an error. Moreover in the ' ' Index Alphabeticus ' ' 

 of the " Supplementum," published in 1799, we find again the 



* Some changes in Crustacean Nomenclature, Proc. Biol. Soc. Washington, XVII, pp. 

 169-172, 1904. 



t Nomenclator entomologicus secundum Entomologiam systematicam ill. Fabricii 

 adjectis speciebus recens detectis et varietatibus, Kiel and Hamburg, 1795. 



2-Pnoc. Bior,. Soc. WASH., Vol.. XVIII, 1905. (9) 



