982 



SCIENCE. 



[N. S. Vol. XV. No. 390. 



only in definite modifications. Pishes 

 are nearer the type than mammals and 

 especially man. Naturally therefore the 

 embryos of mammals resemble fishes. If 

 we recognize in the fish merely the slightly 

 developed vertebrate (which is the un- 

 founded assumption) we must interpret 

 the mammal as a highly developed fish, 

 and then of course it is consistent to say 

 that the embryo of a vertebrate is at first 

 a fish. For this reason the prevailing view 

 of the law of individual development nec- 

 essarily implies a progressive series in the 

 animal kingdom. But the fish is more than 

 an imperfect vertebrate. It has undoubted 

 piscan characters as its development 

 abundantly shows, and this development, 

 as in all animals, is governed by two con- 

 ditions : 



1. By progressive diversification of tis- 

 sues and of form, accompanied, 



2. By the passage from a general, in- 

 different and indefinite state into a defi- 

 nite and particular one. 



Otto C. Glasee. 

 Johns Hopkins University. 



MEMBERSHIP OF THE AMERICAN ASSO- 

 CIATION . 



The following have completed their mem- 

 bership in the American Association for the 

 Advancement of Science during the month 

 of May: 



Herman R. Ainsworth, M.D., Addison, N. Y. 



Chas. E. Allison, M.D., Elysburg, Pa. 



Howard S. Anders, M.D., 1836 Wallace St., 

 Philadelphia, Pa. 



Winslow Anderson, M.D., 1025 Sutter St., San 

 Francisco, Gal. 



Wm. J. Asdale, M.D., 5523 Ellsworth Ave., 

 Pittsburg, Pa. 



Adolph Barkan, M.D., 14 Grant Avenue, San 

 Francisco, Cal. 



Guido Bell, M.D., 431 E. Ohio St., Indianapolis, 

 Ind. 



J. Mortimer Bessey, M.D., 1814 Adams St., 

 Toledo, Ohio. 



Julius C. Bierwirth, M.D., 137 Montague St., 

 Brooklyn, N. Y. 



Joseph W. Blankinship, Ph.D., State College, 

 Bozeman, Montana. 



Anthony J. Boucek, M.D., 624 Chestnut St., 

 Allegheny, Pa. 



Norman Bridge, M.D., 100 Grand Ave., Pasa- 

 dena, Cal. 



Wallace A. Briggs, M.D., 1300 I St., Sacramento, 

 Cal. 



George M. Brill, 1134 Marquette BIdg., Chicago, 

 111. 



Philip K. Brown, M.D., 1303 Van Ness Ave., 

 San Francisco, Cal. 



Charles C. Browning, M.D., Highland, Cal. 



James I. Buchanan, 6108 Walnut St., Pitta- 

 burg, Pa. 



W. J. Burdell, M.D., Lugoff, S. C. 



Leroy S. Chadwiek, M.D., 1824 Euclid Ave., 

 Cleveland, Ohio. 



Stanford E. Chaill6, M.D., P. 0. Drawer 261, 

 New Orleans, La. 



William Cleburne, 1219 South 6th St., Omaha, 

 Nebr. 



Thomas U. Coe, M.D., Bangor, Maine. 



Wm. H. Coster, Shady Ave., above 5th Ave., 

 Pittsburg, Pa. 



H. Holbrook Curtis, M.D., Madison Ave., New 

 York, N. Y. 



J. Y. Dale, M.D., P. 0. Box 14, Lemont, Pa. 



Nathan S. Da\ds, M.D., 65 Randolph St., Chi- 

 cago, 111. 



Gordon K. Dickinson, M.D., 278 Montgomery 

 St., Jersey City, N. J. 



Wm. S. Disbrow, M.D., 151 Orchard St., New- 

 ark, N. J. 



George Dock, M.D., 1014 Cornwell Place, Ann 

 Arbor, Mich. 



Charles W. Dulles, M.D., 4101 Walnut St., 

 Philadelphia, Pa. 



Henry B. Dunham, M.D., State Sanatorium, 

 Rutland, Mass. 



Lehman H. Dunning, M.D., 224 N. Meridian St., 

 Indianapolis, Ind. 



Lewis L. Dyche, 1611 Mass. St., Lawrence, 

 Kansas. 



James B. Eagleson, M.D., 512 Burke Bldg.,. 



Seattle, Wash. 



Adalbert Fenyes, M.D., P. 0. Bo.x W, Pasadena,. 

 Cal. 



George E. Fisher, University of Pennsylvania, 

 Philadelphia, Pa. 



Robert Fletcher, Thayer School of Civil En- 

 gineering, Hanover, N. H. 



