[ V ] 
XVII. On the Physiological Action of the Bark of Erythrophleum Guinense, generally 
called Casca, Cassa , or Sassy Bark. By T. Lauder Brunton, M.B . , F.B.S., 
and Walter Pye, Esq page 627 
XVIII. Further Observations on the Locomotor System of Medusae. By George J. 
Romanes, M.A., F.L.S . , &c. Communicated by Professor Huxley, LL.B., 
Sec.B.S 659 
Index 
753 
ERRATA. 
Page 464, line 19. Aji Barang, for Lat. 2° 25' S. read 7° 25' S. 
Page 475, line 2. Declination, At sea— Lat. 17° 15' S., Long. 292° 45' E. should he expunged. 
