RECENT ADVANCES IN SCIENCE 59 



vol. xv. No. 2, September 191 8) ; Miller, "A New River- 

 Dolphin from China " (Misc. Coll. Smithson. Inst. vol. lxviii. 

 No. 9, 191 8), and " Mammals and Reptiles collected by Theo- 

 dore de Booy in the Virgin Islands " (Proc. U.S. Nat. Mus. 

 vol. liv. 1918) ; Radash, "A Branching or Duplication of the 

 Neural Canal " (ibid.), and Risquez, " Un casa de ectopia extra- 

 toraxica " (ibid. July 191 8). 



General. — The papers include : Allen, " An Inexpensive 

 Projection and Drawing Apparatus " (Anat. Rec. vol. xv. No. 1, 

 August 191 8); Mast, " Effects of Chemicals on Reversion in 

 Orientation to Light in the Colonial Form, Spondylomorum 

 quaternarium " (Jour. Exp. Zool. vol. xxvi. No. 3, August 191 8) ; 

 and Miller, " A Differential Injection Mass for use with Stereo- 

 roentgenograms " (Anat. Rec. vol. xv. No. 1, August 191 8). 



