72 RECORDS 



might be due to the withdrawal of water from the muscle, or 

 to the action of the small number of ions present. 



Dr. 0. P. Hay described his summer's work upon the fossil 

 fishes of the American Museum of Natural History, particular 

 attention having been given to the Cretaceous forms. Work was 

 also carried on upon the turtles. 



Professor A. W. Grabau spoke of his collecting expeditions 

 for Silurian and Devonian fossils. He mentioned also an inter- 

 esting case of non-conformity at Rondout, which he had been 

 able to explain. Explorations of the Palaeozoic coral reefs of 

 Wisconsin were also described. 



Dr. G. N. Calkins referred to the investigations which had 

 been carried on at the Marine Biological Laborator}% under his 

 direction, upon the sporozoa associated with cancerous growth. 

 It was found that the genus Basioplira when introduced into the 

 body of a toad w^ould cause the production of a tumor. Dr. 

 Calkins's personal work uoon Parainoecunn had been continued, 

 the action of various salts upon this form receiving particular 

 attention. 



Dr. M. A. Bigelow reported upon his observations upon the 

 power of young birds to distinguish different colors, of interest in 

 connection with the problem of insect coloration. Much of the 

 summer had been utilized in the preparation of a manuscript for 

 a laboratory manual. 



Mr. Naohide Yatsu described the results of his experiments 

 upon the eggs of the common starfish, which were carried on 

 at Woods Hole. Artificial parthenogenesis was induced by 

 ether, and larvre were reared up to the eighteenth day. 



Mr. Raymond Osburn described the location and work of 

 the Vancouver Island Laboratory of the University of Minne- 

 sota, where he had spent the summer. His particular in- 

 terest concerned the invertebrata and birds of the Vancouver 

 region. 



Professor Crampton referred to the work of the Woods Hole 

 Laboratory, and mentioned briefly his work at the Bayshore 

 Laboratory upon the development of Bulla and of his experi- 

 ments upon moths. 



