Bry. 1 
IX. BRYOZOA. 
BY 
Helen P. Kemp. 
CONTENTS. 
Page 
Introduction ♦ ...., 1 
\ 
I. Titles i . . . 2 
II. Subject Index 
(a) Biology . . 6 
(b) Geographical * . . . . . 7 
( c ) Geological ...... 7 
III. Systematic Index 
1. Entoprocta 8 
2. Ectoprocta 8 
(а) Gymnoknma ... 8 
(а) Cyclostoma . . 8 
(б) Cheilostoma . . 9 
(б) Phylactolsema ... 10 
INTRODUCTION. 
The Bryozoa literature of 1905 is marked by some important papers on 
structure, development and relationship. Retzius (61, 62) has an excel- 
lent monograph on the nervous system of certain Bryozoa demonstrating, 
by means of the silver method, undoubted nerve cells from which fibres 
can be traced to their junction with larger central strands } also a paper on 
the sperm -apparatus of various evertebrates. Waters (76) reports ob- 
servations on the structure of Entalophora regularis showing the presence 
of a thick membranous transverse wall near the distal end of the ten- 
tacle-sheath. Dublin (30, 31) reports work on the relationship between 
the nucleoli and the chromosomes of the somatic and germ cells of Pedi- 
