192 REPORT—1883. 
U 
fia 
= 
MAG 25 DIA 
Fic. 1.—Pinnatopora elegans, Young and Young. Carb, Limst. Hairmyres, Scotland. 
1, Typical external features of species. 2. Foraminated reverse. 
3. Transparent section : typical structure of the genus. 
Family IV. Diroporipz, 
Zoarium fenestrated, or partly free and fenestrated. Zowcia arranged 
biserially in the branches, opening on one side only. Supplementary 
pores, or foramina, in all the species of the various genera, but in one 
group the foramina are found on the reverse also. 
General Remarks on the Family.—In the present Report I can only 
indicate the place that the family should occupy in this classification. I 
have made a careful analysis of the generic and specific characters of the 
whole of the carboniferous group of Polyzoa that may ultimately find a 
fitting resting-place here. In 1873, Mr. Robert Etheridge, jun., described! 
a ‘peculiar polyzoon,’ under the name of Synocladia carbonaria, R, Eth. 
jun., taking King’s genus for the placement of the species. Ultimately, 
in the descriptive part of ‘Explanation of Sheet 23,’? p. 102, Mr. 
Etheridge places the Scotch specimen as a variety only of Synocladia 
bisertalis, Swallow; var. Oarbonaria, Eth. jun. In 1858, details of 
Swallow’s species were published (‘ Trans. St. Louis Acad.’ vol. i. p. 179), 
and in 1873, Mr. Meek referred Septopora cestriensis, Prout,* to Synocladia 
» Annals § Mag. Nat. Hist. 2 Geological Survey of Scotland. 
’ «Descriptions of New Species of Bryozoa,’ Trans. St. Louis Acad. of Sci. Third 
Series, 1859. 
