4:52 



THE AMERICAN NATURALIST [Vol. XLII 



subjects of regeneration and grafting. The yearly reviews of 

 Barfurth in the Ergelnisse fur Anatomit und Entwickelungs- 

 gcschichte will supply special students with the numerous details 

 that the study of regeneration is bringing to light. The more 

 analytical and philosophical discussion of the problems involved 

 will be found in the recent reviews and writings of Driesch. 

 The general reader and layman who is less concerned with these 

 details or with "the higher criticism" can not do better than 

 give Korsehelt's hook a careful reading. 



M. 



PARASITOLOGY 

 A Chinese Parasite. — Looss has recently demonstrated 1 that 

 under the old name "Opixthorvhis sinensis" two human para- 

 sites have been confused by all save Jiaelz. whose differentiation 

 of the two species in 188:1 has been generally disregarded. For 

 these forms the new genus Clonorchis is created with C. sinensis 

 (Cobbold, 1875) as type. This species is the Distomum inocuum 

 of Baelz and is chiefly a Chinese parasite, though it occurs rarely 



described in text -books, etc., as " Opistorchis sinensis." Ac- 



sumably so in Annam and Tonkin also. It seems to be confined 

 to localities on the sea-shore. I would suggest that this appears 

 to indicate infection through fish, as is the case with OpistJtorch is 

 fdineus in the territory adjacent to the Baltic. 



H. B. W. 



Mnn. Trap. Med. and Par., 1, 123. 



(No. 407 was issued on June 7.) 



