184 REPORT—1883. 
In the Suborder Cheilostomata, fam. Membranoporide, Busk, Mr. 
Ulrich places one genus only, ? Paleschara, Hall, and he remarks (loc. 
cit. p. 156): ‘A few American Paleozoic genera of Bryozoa have been 
omitted from the above classification, because I have not yet been able 
to give them the attention required for a full elucidation of their characters 
and affinities.’ 
Through the kindness of Mr. J. M. Nickles, of Cincinnati, I have been 
furnished with specimens of a great many of the so-called Bryozoa of the 
Cincinnati group, and the drawings and descriptions of Mr. Ulrich will 
enable me to give details, and weave in genera in the classification of the 
whole of our Fossil Polyzoa. 
For rather more elaborate details than I have been able to give in this 
report I have very great pleasure in referring the reader to the first 
chapter of ‘ The Genus Monticulipora,’ } entitled ‘The General History of 
the Genns,’ and also Chapter III. for the statement of the views of Dr. 
Lindstrom (extract from ‘ Ann. Nat. Hist.’ ser. iv. vol. xviii. p. 5 et seq.), 
and to Mr. Bask, Mr. A. W. Waters, and Prof. Nicholson on the genus 
and species of Heteropora. . 
Class Potyzoa. 
= Bryozoa, Ehrenb. Bryozoa (pars) of American authors. 
= Bryozoa, Reuss, Manzoni, Waters. 
Order Grmnotemata, Allman. 
I. Suborder Cuetnosromara, Busk, Hincks. 
‘Orifice of the zowciuwm closed by a movable opercular valve. Ova 
usually matured in external marsupia. Appendicular organs (avicularia 
and vibricula) frequently present.’ 
II. Suborder Cyrctosromara, Busk, Hincks. 
Zoewcia tubular, with a plain inoperculate orifice. Marsupia and 
appendicular organs wanting. 
III. Suborder Cryprostomata, Vine. 
. Zoecia tubular, sub-tubular, in section slightly angular. Orifice of 
cell surrounded by vestibule, concealed. 
Family I. Sromaroporip#£. 
Zoarium entirely adherent, simple or branched. Zowcia arranged in 
a single series, or in several, which take a linear direction generally. 
Genus 1. Ascodictyon, Nicholson and Ktheridge, jun.” 
2. Stomatopora, Bronn.* 
Subgenus Proboscina, Smitt. 
In the above grouping I have taken the simplest type of cell with 
which I am acquainted ; and, as these genera are well represented in our 
own Wenlock Shales, which were evidently derived from an earlier series 
of rocks, they may be taken to represent the earliest adherent types of 
' Prof. Nicholson, (Blackwood & Sons) Edinburgh and London, 1881. 
2? Ann. Mag. Nat. Hist. June 1877. 
3 For references, see 2nd and 3rd Brit. Assoc. Reports on Foss. Polyzoa, 1881-82. 
