No. 513] 



NOTES AND LITERATURE 



of dynamite are here clearly emphasized by Professor A. P. 

 Knight. Professor Knight does not, however, find the effect 

 of sawdust as injurious as has been hitherto supposed. A strong 

 solution of sawdust poisons fish and fish fry, through the agency 

 of compounds dissolved out of the wood cells. Fishes will desert 

 a river polluted with freshly made sawdust, going down stream 

 or into tributaries to escape from the disagreeable influence of 

 the sawdust extracts. Waste matters which would be deadly 

 in one river will pass away and prove of little harm in another, 

 where the conditions are different. 



In the Journal of Morphology (1908), Reighard and -Mast 

 describe the development of the hypophysis of Amia. 



In the Journal of E.rp< rim< ntal Zoologg (1909), Professor 

 C. R. Stockard describes the development of the young of 

 Fundulus hetcroclitus in magnesia n solutions instead of salt 

 water. The result is the development of cyclopean fish, with 

 a single coalesced eye on the top of the head. It is thought that 

 magnesia possesses an anesthetic effect, and is inhibitory in its 

 influence on muscular activity. It. therefore, retards the out- 

 pushing of the eyes in the embryo, leaving the eyes without 



sufficient for their normal separation. 



In the Outing Magazine (September, 1908), Bonnycastle Dale 

 describes the mystery of the salmon, and its desperate struggle 

 to breed in the waters of the Columbia, with some excellent 

 photographs. 



Under the head of "The Fishes of Japan," Otaki, Ftyita and 

 Higurashi continue their fifth volume of discussion of the Japa- 

 nese fisheries and fishing methods. The fourth volume contains 

 colored plates of a number of Japanese food fishes. The text is 

 entirely in Japanese. 



David Starr Jordan. 



PARASITOLOGY 

 The question as to the relation of the tse-tse fly which is abso- 

 lutely demonstrated to be the transmitting agent of sleeping 



