IV. - CONTENTS. 



Notes on the Structure of Oikopleura (with Plates 

 I_IV). By Prof. Herdman pp. 31—47 



Kecord of Hydroida from the Isle of Man. By G. 

 W.Wood, F.I.C pp. 48— 49 



Eevised Keport on Podophthalmata and Cumacea. 

 By A. 0. Walker, F.L.S pp. 50—58 



Supplementary Keport upon the Testaceous Mol- 

 LUSCA OF THE L.M.B.C. DISTRICT. By the late 

 Francis Archer, B. A pp. 59 — 75 



Corrections. 



In Third Annual Eeport &c., p. 27, line 6 from foot, for 

 Swammerdamii read vedlomensis. 

 Do. do. p. 37, line 8 from top, 



D. hradyi may = D. sjiinosa. 

 In Third Report on Porifera, p. 228, line 8 from foot, the 

 " prionorrhabds " belong to Sijcaudra. 

 In Fourth Annual Report &c , p. 10 middle, delete 

 Sertularella tenella. 

 Do. do. p. 19, hne 7 from foot, 



delete Leda permda. 

 Do. do. p. 29, line 4 from foot, 



delete Chiton discrepans. 

 In Revised List of Marine Algae, Plates, for PI. 34 read 

 PL III. 

 Do. p. 94, Footnote, read Vol. XXVIII. 



Do. p. 112, line 5 from top, for 29 read 22. 



Do. do. line 6 from foot, for 42 read 45. 



Do. p. 114, line 6 fiom top, for 39 read 40. 



Do. p. 122, hne 14 from foot, for 90 read 89. 



Do. p. 125, add at end : — 



Fig. 10. Isolated central cell, X 450. 

 Fig. 11. Striation on walls of intercellular canal, X450. 



