LEE BARKER WALTON 27 



In fresh water, Germany. 



Penard described this species in 1890 from a single in- 

 dividual referring it to the genus Actinolophus although 

 noting its close relationship with the tentaculiferous in- 

 fusoria. Sand, 1901, in his study of that group came to 

 the conclusion that A. capitatus was nearer related to the 

 Heliozoa than to the Suctoria for the following reasons, 



(a) the pedicle resembles that of Clathndlna elegaits, 



(b) the pedicle does not penetrate into the gelatinous 

 envelope as in Tokophrya Ihnbata one of the Suctoria, (c) 

 the nucleus is excentric, (d) the species closely resembles 

 A. pedtuiculatiis. Penard, 1904, in his paper on the fresh 

 water Heliozoa, after having examined several more 

 specimens which he remarks are exceedingly rare, insisted 

 on the suctorian nature of the form, maintaining that the 

 points raised by Sand have little value. Penard at the 

 same time suggests the desirability for a further study of 

 the form. Consequently it seems advisable at present to 

 allow it to remain in the genus Actinolophus. 



BIBLIOGRAPHY 



ScHULTZE, F. E. 1874, Rhizopodienstudien, Arch. f. mikr. Anat., v. 10. 

 Penard, Eugene, 1890, Ueber einige neue oder wenig bekannte Protozoen, 

 Jahrb. Nassau Ver. f. Naturk. Jahrg. 43. 



Zacharias, O. 1893, Forschungsber. Biol. Stat. Plon, v. 1. 

 ScHAUDiNN, Fritz, 1896, Das Tierreich, Heliozoa, Berlin. 



Sand, Rene. 1901, Etude monographique sur le groupe des Infusoires tentaculi- 

 feres. Ann. de la Soc. Beige de Microscopie. 



Penard, Eugene. 1904, Les Heliozoaires d'eau douce, Geneva. 



