IXTKODUCTIOX. 
XXXI 
bundle of cylindrical tubes surrounded by a layer composed of tbe 
expanded distal ends of the zooecia ; the genera included here were 
Cyrtopora, Stigmatopora, a new genus founded from some species of 
PustuUpora, and two species of Meliceritites. 
This third group, though accepted by Pergens, appears to be 
useless; but the main lines of Hamm’s arrangement of the other 
groups seem to me a decided advance ; thus his Cerioporina was 
the first step towards the collection into one Order of the massive 
Bryozoa composed of closely packed tubular zooecia, and with the 
crowded apertures, sometimes supplemented by smaller openings, 
occupying almost the whole surface of the zoarium. The 
foundation of this section was a partial recognition of the division 
subsequently named the Pvectangulata and the Trepostomata. 
Hamm, however, included in this section some Bryozoa, such as 
Fasciculipora and Filifascigera, which should go with genera which 
he placed in his Tubuliporina. 
The year 1887 was important in tlie history of the Cyclostomata 
owing to the publications of MacGillivray, Marsson, Meunier & 
Pergens, and Waters. MacGillivray ^ then published his Catalogue 
of the Marine Polyzoa of Victoria, and in it founded four new genera 
of Cyclostomata ; he practically accepted Busk’s classification of 
1875, and retained it also in his important monograph of the 
Cainozoic fossil Bryozoa of Victoria in 1895." He accepted the 
division into Articulata and Inarticulata, and divided the latter 
among four families — the Idmoniidae, from which he excluded 
Fntalophora (which Busk had placed in it under the name 
Fustulopora), the Tubuliporidae, including Fntalophora and TecU- 
cavea\ the Lichenoporidm (which in 1887 he called Discoporellidae), 
including Feteropora and Fiscofascigera ; and the Frondiporidse, 
including Supercytis, Fasciculipora, and a species which he referred 
to Fiscotubigera. Unfortunately MacGillivray died before the 
completion of his monograph, and the section on the Cyclostomata 
was left very imperfect. 
In 1887 also appeared Marsson’s important monograph on the 
varied Bryozoa of the Biigen Chalk. He had no Articulata to deal 
1 P. H. MacGillivray. Proc. E. Soc. Victoria, vol. xxiii. pp. 187-224. Issued 
February^ 1887. 
2 P. H. ISlacGillivray. A Monograph of the Tertiary Polyzoa of Victoria : 
Trans. R. Soc. Viet., 1895, vol. iv. 
