Revision of the Nomenclature of the Brachyura. 167 



haps was never used except by Oken, the name Thia may 

 properly be used for the crustacean genus. 



Kraussia was used by Dana for a genus of crabs,* and by 

 Davidson for a genus of mollusksf in the same month of the 

 same year, May, 1852 ; but Davidson in 1859 changed his 

 Kraussia to Kraussina, acknowledging the priority of Dana's 

 genus. 



10. Original orthography to be preserved except in case of typo 

 graphical error. According to Canon XL of the A. 0. U. Code, 

 we should write Ethusa not jEthusn, ^Ethra not (Ethra, Eriocheir 

 not EriochiruSj Podophtalmus not Podophthalmas, Zosimus not 

 Zozymus, Lophozozymus, Stenorynchus, Dorynchus, Loxorynchus, 

 Pyromaia Stimpson, 1871. not Apiomaia von Martens, 1873. 

 Goneplax Leach, Edin. Encyc., VII, 1814, was spelled Goneplat 

 on p. 393, Goneplax on p. 430. The first form may be consid 

 ered a typographical error. Goneplax was so used by Leach in 

 1815; in 1816 written Gonoplax; since that time both Goneplax 

 and Gonoplax by different authors. 



*Proc. Acad. Nat. Sci. Phila., VI, 86. 

 t Ann. Nat. Hist., (2) IX, 369. 



