46 RECORDS 



bryo acquired a more perfect and specialized (caenogenetic) 

 mode of obtaining nourishment from the yolk. 



The paper by Dr. Bigelow dealt chiefly with protoplasmic 

 movements and associated displacements of the yolk-materials 

 in various cirripede eggs during maturation and first cleavage. 

 The telolecithal distribution of the egg-substances, the forma- 

 tion and disappearance of a yolk-lobe, and precleavage move- 

 ments associated with differential distribution of the entoblastic 

 materials were described. Finally, a turning of the first cleav- 

 age spindle from a transverse to an oblique axis of the ellipsoidal 

 egg was compared with similar more extensive movements in 

 nematode eggs. 



Mr. C. C. Trowbridge presented the results of systematic 

 observations on the effect of the wind on the migration of hawks 

 and many other birds along the Atlantic coast. The principal 

 points of the paper were illustrated by means of diagrams giving 

 the directions taken by the migrating birds under the influence 

 of different winds. It was shown that a knowledge of meteor- 

 ology was necessary in considering this subject, because the 

 effective winds depend on storm centers travelling eastward. 

 In one case, in the height of the southward migration, a storm 

 center off the coast of Maine caused northerly winds through- 

 out 800,000 square miles in the eastern portion of the United 

 States and Canada, the velocity of the wind area averaging 20 

 miles per hour. A former paper on the subject was briefly re- 

 viewed, in which the author showed that flights of hawks and 

 other land birds during the migrations were due to the crowd- 

 ing of the birds in a narrow coast-line path by the wind. The 

 recent observations, now, warrant the conclusion that hawks 

 and many other birds regularly depend on a favorable wind as 

 a help in their migratory movements, and as a rule, migrate 

 only when favorable winds occur. A brief account was given 

 also of a retrograde movement of migrating swallows in the 

 spring, evidently due to a return flight of the birds after they 

 had been blown far out of their course by a strong wind from 

 the west. 



An election of sectional officers being held. Professor Bash- 



