1912.] NATURAL SCIENCES OF PHILADELPHIA. 489 



October 1. 

 Mr. Charles Morris in the Chair. 



Twenty persons present. 



The Publication Committee reported the reception of papers 

 under the following titles: 



"A revision of the genera and species of the group Mogoplistii 

 (Orthoptera: Grillidse) found in America north of the Isthmus of 

 Panama," by James A. G. Rehn and Morgan Hebard (June 6). 



"On the Orthoptera found in the Florida Keys and extreme 

 southern Florida, I," by James A. G. Rehn and Morgan Hebard 

 (June 6). 



"A catalogue of Japanese Cephalopoda," by S. Stillman Berry 

 (June 15). 



"The experimental method of testing the efficiency of warning 

 and cryptic coloration in protecting animals from their enemies," 

 by W. L. McAtee (June 15). 



"Statistical studies on the variation of the wing-length of a 

 butterfly of the subfamily Satyrinse," by T. Fukuda (June 15). 



"Silicified wood from the Triassic of Pennsylvania," by Edgar T. 

 Wherry, Ph.D. (June 21). 



"Age and correlation of the 'New Red' or Newark group in 

 Pennsylvania," by Edgar T. Wherry, Ph.D. (June 21). 



"A new Synallaxis," by Witmer Stone (July 25). 



"New Polyclads from Monterey Bay, California," by Harold 

 Heath and Ernest B. McGregor (August 14). 



"Observations on the structure of some coral beds in the Hamilton 

 Shale," by Burnett Smith (August 15). 



"A new species of Vertigo from Florida," by E. G. Vanatta 

 (August 22). 



These had been reported on favorably for publication in the 

 Proceedings. 



A paper entitled "Experimental studies in nuclear and cell division 

 in the eggs of Crepidula, " by Edwin G. Conklin (August 5), was 

 accepted as a contribution to the commemorative volume of the 

 Journal. 



