LIST OF PUBLICATIONS, GENERAL AND ANATOMICAL. Pol. 3 
Vine, G. R. Report of the Committee, consisting of Dr. H. C. Sorby 
and Mr. G. R. Vine, appointed for the purpose of reporting on recent 
Polyzoa. Cheilostomci and Cyclostomata. Rep. Brit. Ass. 1885, 
pp. 481-680 ; abstr., J. R. Micr. Soc. 1887, p. 67. 
General and Anatomical. 
Vine’s Report is a compilation of all available material regarding the 
systematic arrangement aud distribution of recent Polyzoa. After intro- 
ductory observations explaining the terminology, the classifications of 
Busk & Hincks are given ; then an alphabetical list of families, genera, 
aud species. Then follows a systematic list in which the families and 
genera are defined. Lists of synonyms, with the adopted names, are added, 
from Hincks & Busk. Geographical aud bathymetrical distribution are 
fully treated, lists being given of forms from the different regions 
of the globe. Abstracts are given of several published papers and a 
bibliography. 
In the marine Ectoprocta the vegetative end of a stolon consists of 
homogeneous indifferent tissue ; in most cases this differentiates into 
the parietal endocyst, which continues to thicken, and the central endo- 
cyst, which always maintains its vitality and remains indifferent. In some 
cases this differentiation does not take place. When, however, it is com- 
plete, an ectodermal tissue is enclosed in a pouch composed both of endo- 
derm and mesoderm, in the centre of which a small mass of shells, the 
future intestine, becomes isolated. As soon as the polypide has appeared 
in the zocecium various organs are formed. “ The tentacles, with their 
flagellate epithelial cells, and the epithelium of the lophophore and of the 
oesophagus, no doubt represent the ectoderm. The tentacular sheath 
consists internally of a layer of delicate flattened cells, which appear to 
be ectodermal. The parietal endocyst, differentiated and specialized as 
it is in Flustra, may be regarded as forming an outer skin, or somewhat 
more definite ectoderm. All the parts in the zooecium, which are con- 
tained . between the outer skin and the intestinal epithelium, with the 
internal epithelium of the tentacular sheath, form the mesoderm and the 
geueral cavity Joliet. 
The rudiment of a digestive canal observed by M. Joliet is merely a 
mass of lymphatic cells, comparable with the lymphoid cells of Annelids 
described by Kukenthal. The figures of Nitsche are defended against 
certain criticisms of the former author ; Ostrooumoff (4). 
The Cheilostomata are distinguished as calcareous, with a typically 
tetragonal zocecium, a semicircular operculum, and spicules, which pro- 
bably increase their respiratory surface. Their zooecial skeleton has 
pores of communication on either the basilar or lateral surfaces. The 
Ctcnostomata are chitinous and have no operculum. Two varieties of 
ovicells are distinguished: — (1) Those consisting of a whole zooecium 
modified except the digestive tract ; (2) those which occur as organs 
on certain zocecia. The ectoderm lies below a cuticle ; as development 
proceeds the protoplasm gathers round the nuclei, producing a reticulate 
appearance. The ectoderm gives rise to the epithelium of the tentacular 
