IV CONTENTS. 



PAGE 



On some Parasites found in Echinus esculentus, L. By 

 Arthuk E. Shipley, M.A., Fellow and Tutor of Christ's Cul- 

 lege, Cambridge, and Lecturer in the Advanced Morphology of 

 the Invertebrata in the University. (With Plate l8) . . 281 



Tiie Scottish Silurian Scorpion. By R. I. Pocock. (Wit.ii Plate 

 l9) 291 



CONTENTS OY No. 175, N.S., MAY, 1901. 



MEMOIRS : 



The Life-History of Nucula delphinodonta (Mighels). By 

 Oilman A. DiiEW, Professor of Biology, University of Maine, 

 Orono, Me. (With Plates''20-2.5) . . . .313 



On the Structure of the Hairs of Mylodon Listai and other 

 South American Edentata. By W. G. Ridewood, D.Sc , F.L.S., 

 Lecturer on Biology at tlie Medical School of St. Mary's Hos- 

 pital, London. (With Plate "26) 393 



On the Structure and AflBnities of Saccocirrus. By Edwin S. 

 GooDKlCH, M.A., Fellow of Merton College, Oxford. (With 

 Plates '27— 29) 413 



On the Question of Priority with regard to certain Discoveries 

 upon the .Etiology of Malarial Diseases. By George H. F. 

 NuTTALL, M.A., M.D., Ph.D., University Lecturer in Bacteri- 

 ology and Preventive Medicine, Cambridge . . . 429 



Studies in the Retina: Rods and Cones in the Frog and in some 

 other Amphibia. By H. M. Bernard, M.A.Canlab. (from the 

 Biological Laboratories, Royal College of Science, London). 

 Part II. (With Plates' 30 andlil) .... 443 



Staining with Brazilin. By Sydney J. Hickson, Beyer Professor 

 of Zoology in the Owens College, Manchester . . . 469 



CONTENTS OF No. 176, N.S., AUGUST, 1901. 



xMEMOIRS: 



On Two New Species of Onychophora from the Siamese Malay 

 States. By Richard Evans, M.A., B.Sc, of Jesus College, 

 Oxford. (With Platesij2— ^7) 473 



