THE APODOUS HOLOTHURIANS 189 



Antarctic Littoral Region: East American Littoral Region: 



Caudina (3). Caudina (1). 



Molpadia (3). Mediterranean Subregion: 



Molpadia (1). 

 West American Subregion: 

 Molpadia (2). ? 

 Guinea Subregion: 



Molpadia (1). ? 



We know too little of the range of the great majority of the species to make 

 profitable or worth while any attempt at a study of their distribution. It might 

 be added, however, that the Molpadiidac afford no support to the so-called 

 "theory of bipolarity, " for the southern species of Molpadia and Caudina are 

 perfectly distinct from the northern forms, and there is no representative of 

 Eupyrgus or of Ceraplectana in southern seas. 



