196 PORCELLANAD^E. 



now consists of Galathea rugosa of Fabricius, and a new 

 species obtained by Mr. Darwin, and through his kindness, 

 in my possession. 



The reasons which have induced me to consider, with 

 Dr. Leach, that the forms which constitute the two fami- 

 lies Porcellaniens and Galatheides of Edwards, are properly 

 one group, have been already stated. Dr. Leach consi- 

 dered Galathea as the typical form of the family, as we 

 may conclude from his giving to it the name of GALA- 

 THEAD^E. I, however, cannot but think that Porcellana 

 is the typical form, and that Galathea, with Munida, 

 jfflglea, and Grlmotea are aberrant, passing off towards the 

 Macrourous type ; although I cannot agree with Edwards 

 in considering these latter as true Macroura. 



