XV'iii FOOT-NOTES TO EVOLUTION. 



FIG. PAGE 



24. Section of mature Sacculina (after Lang). . . . 281 



25. Sacculina attached (after Lang) 282 



26. Sacculina with limbs absorbed (after Lang) . . . 282 



27. Cretin of Aosta (after a photograph by Dr. J. W. Jenks) 285 



28. Cretin of Aosta (after Edward Whymper) . . . 286 



FULL-PAGE PLATES. FAC , NG 



PLATE PACK 



Some chipmunks of California, showing distinct spe- 

 cies produced through isolation (after nature, by 

 William Sacketon Atkinson) . . Frontispiece 

 I. Cephalopoda ; development of Glypkioceras (after na- 

 ture, by Mrs. Frances Rand Smith) .... 240 

 II. Development of Glyphioceras (after nature, by Frances 



Rand Smith) , . . 242 



III. Development of Schloenbachia (after nature, by Fran- 

 ces Rand Smith) . . . . . . . 246 



IV. Development of septa in Ammonites (after nature, by 



Frances Rand Smith) . . . . . 248 



V. Forms of Ammonites (after nature, by Frances Rand 



Smith) 252 



