

CONTENTS OF PAET III. 



PAGE 



15. Orthogenetic variation in the shells of Chelonia . . . 207 



By HAXS GADOW, M.A., Ph.D., F.R.S. 



With Plates XXIV.— XXV. and one text-figure. 



16. Enteropneusta from the South Pacific, with notes on the 



West Indian Species ........ 223 



By ARTHL'K WII.LKV, D.Sc. (Hon. M.A. Cantab.) 

 With Plates XXVI. -XXXII. and seven text-figures 



17. On a collection of Echiurids from the Loyalty Islands, New 



Britain and China Straits, with an attempt to revise the 

 group and to determine its geographical range . . . 335 



By ARTHUR E. SHIPLEY, M.A. 

 With Piute XXXIII. 



