CONTENTS OF No. CXXI.—New Series. 
MEMOIRS: 
On Phymosoma varians. By Artuur E. Surrtey, M.A., Fellow 
and Lecturer of Christ’s College, Cambridge, and Demonstrator of 
Comparative Anatomy in the auanige ee Plates I, I, II, 
and IV) : : P : 
The Spinning Apparatus of Geometric Spiders. By Cxrciz War- 
BURTON, B.A., Christ’s College, Cambridge. (With Plate V) 
On the Structure and Functions of the Cerata or Dorsal Papille in 
some Nudibranchiate Mollusca. By W. A. Herpmay, D.Sc., F.L.S., 
Professor of Natural History in University College, Liverpool. 
(With Plates VI, VII, VIII, IX, and X) : . i 
Further Observations on the Histology of Striped Muscle. By C. F. 
Marsuatt, M.B., M.Sc., late Platt Physiology Scholar in the 
Owens College. (With Plate XI) . 3 4 : : 
On Chetobranchus, a New Genus of Oligochetous Chetopoda. 
By Atrrep Grpss Bourne, D.Sc.Lond., F.L.S., C.M.Z.S., Fellow 
of University College, London, and of the Madras University. ii 
Plate XII) . , 5 p - 
The Presence of Ranvier’s Constrictions in the Spinal Cord of Verte- 
brates. By Dr. Witt1am TownsEnp Porter, of St. Louis. (With 
Plate XII dis) . 
Proressor Birscuxi’s Experimental Imitation of Protoplasmic 
Movement 
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