1919^ Proceedings of the Academy of Science 7 



tiire of such prey as it is used to take. Lastly data adduced show 

 that the fish can endure the strain necessary to the "phaying" and 

 pulling in of the fish or turtle. 



The paper was illustrated by all the known figures showing this 

 use of this fish. The completed paper will be published shortly. 



Reproduction In Cyclops. Fannie E. Vann. 



Several experiments were carried on in rain water, filtered pond 

 water, distilled water, and sterile pond water as media which were 

 free from unattached eggs and larvse, during the months of April, 

 May, December, 1918, January, February, March, April and May, 

 1919. Some of the experiments were run in glass standers, and 

 others in egg shells as containers. Our conclusions were: (1) Egg 

 production and hatching occur the year round (with summer results 

 to be determined) ; (2) mature individuals producing eggs are pro- 

 duced from March, April, and May hatched larvse; (3) the best cul- 

 ture medium is filtered pond water; and (4) that the best container 

 is a membraneous vessel placed in a bowl of ''native'' water. Illus- 

 trated by lantern. 



Deposits of Volcanic Ash. John E. Smith. 



(Read by Title) 



In the United States these deposits may be divided into three 

 groups: (1) surface deposits, those at or near the surface which 

 enter into the composition of the soil; (2) bedded deposits, at some 

 depth used chiefly as a source of abrasive material for scouring soaps 

 and polishing powders; and (3) indurated deposits, tufi's now 

 weathering to soil as in the southern Piedmont belt. 



Deposits of volcanic ash occur abundantly in the Rocky Mountain 

 region and westward. In Texas, the deposits extend eastward to 

 an area only a few counties distant from the Gulf. In Oklahoma, 

 they reach nearly to the Arkansas boundary; in ^Missouri, glass, 

 doubtless of this. origin, has been identified in the soil; and in Ne- 

 braska, volcanic ash is reported to be present in nearly every county 

 in the state. It is found also in South Dakota and ^lontana. Thru- 

 out the Plains region in some of the dei)Osits, ash is niixcil with strati- 

 fied clay which is evidence that it fell into water. This water was 

 certainly fresh in western JW'braska and probably elsewhere. 



