CONTENTS. 



CONTENTS OY No. 173, N.S., NOVEMBER, 1900. 



MEMOIRS: PAGE 



The " Sexual Season " of Mammals and the Relation of the " Pro- 

 oestruin" to Mell!^t^uation. By "Walter Heape, M.A., Trinity 

 College, Cambridge ...... 1 



A Description of Epliydatia blembingia, with an Account of 

 the Formation and Structure of the Gemmule. By RicHAKD 

 Evans, B.A. (With Plates^l— ^4) .... 



On a Collection of Nemerteans from Singapore. By R. C 

 • PuNNETT, B.A. (With Plates'S— 8) 



On the Protostigmata of Molgula mauiiattensis (De Kay) 

 By Aktuur WiLLEY. (Willi Plate 9) . 



71 

 111 

 141 



CONTENTS OF No. 174, N.S., :MAI1CH, 1901. 



MEMOIRS:- 



The Development and Succession of Teeth in Hatteria punc- 

 tata. By H. Spencer Harrison, B.Sc.(Lond.), A R.C.Sc, 

 Demonstrator aud Assistant Lecturer in Biology, University 

 College, Cardiff. (Erom the Zoological Laboratory, Royal Col- 

 lege of Science, Loudon, aud University College, Cardiff'.) 

 (WithPlateslO— 12) . . . . ' . .161 



The Anatomy of Pleurotomaria Beyrichii, Hilg. By Martin 

 E. Woodward, Demonstrator of Zoology, Royal College of 

 Science, Loudon. (With Platesl.3— 16) . . .215 



Dolichorhynchus iudicus, n. g., n. sp., a New Acraniate. 

 By Arthur Willey . . . . . . 269 



Heteropleuron Ilectori, the New Zealand Lancelet. By W. 

 Bi.axi and Benham, D.Sc, M.A., F.Z.S^ Professor of Biology 

 in 1 he University of Otago. (With Plate 17) . . .2/3 



