IV. CONTENTS. 
THIRD REPORT UPON THE HIGHER CrusTACEA (with Plates X. 
and XJ.). By A. O. Walker, F.L.58. 
SECOND REPORT UPON THE Poxuyzoa (with Cuts). By Joseph 
Lomas, Assoc.N.§.5. 
SECOND REPORT UPON THE NUDIBRANCHIATA (with Plate XIT.). 
By Professor Herdman, D.Sc., and J. A. Clubb. 
SECOND REPORT UPON THE TuNiIcATA (with Plate XIII.). By 
Professor Herdman, D.Sc. 
REPORT UPON THE SEALS AND CrrTaceans. By T. J. Moore, 
Corr.Memb.Z.8.L. 
CORRECTIONS. 
In the First Report on the Puffin Island Biological Station, 
at page 48, last line, for ‘further on in the present volume,” 
read ‘‘in Proc. Biol. Soc. L’pool, vol. u., p. 78.” 
In same article, p. 57, for ‘‘Scaphosoma”’ read Cymbasoma. 
Dr. Hanitsch wishes to state that the new Sponge described 
in his report on p. 43, and figured in plate vil., under the name 
of Seiriola compacta, really consists of two separate Sponges, a 
Stellettid and an incrusting Suberite. The former is, however, 
the type of a new genus closely allied to Stryphnus, Sollas, and 
for it the name Seiriola may be retained. The family Seiriolide 
must lapse. A revised description of the genus and species will 
be given in the next report. 
