650 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 38. 



North America and Europe and in Japan; E. meyeni all over penin- 

 sular India from Bombay to Cape Comorin and Calcutta; E. japonica 

 not only in Japan but also, as we have seen, in North America. 



Unfortunately, none of the specimens of E. japonica I have exam- 

 ined are in a sufficiently good state of preservation for me to be able 

 to express an opinion as to whether vesicular cells are present or not. 

 Probably they are not present, for Doctor Weltner, who has exam- 

 ined the type-specimens, regards the form as a variety of E. fluvia- 

 tilis. 



The following is the synonymy of E. japonica, so far as we know it : 



L882. Spongillafluviatilis, var. japonica Hilgendorf, Sitzungsb. Ges. Naturf. Freundc, 



Berlin, p. 26. 

 L895. Ephydatia Jluviatilis, var. japonica Weltner, Archiv f. Naturg., vol. 1, pp. 



123, 134. 

 1909. Ephydatia japonica Awandale, Amiot. Zool. Japon., vol. 7, pt. 2, p. 109, 



pi. 2, figw. 3, 3a, 36. 



