SUPPLEMENT TO THE HISTORICAL INTRODUCTION. 



In what follows I have given a brief notice of all the memoirs or works 

 dealing with the Stromatoporoids which are known to me as having been published 

 subsequent to the autumn of 1885, at which time the first part of the present 

 Monograph was in print. 



In the later part of 1885 Herr Fritz Freeh described some Stromatoporoids 

 from the Upper Devonian rocks of Germany in a paper entitled " Die Korallen- 

 fauna des Oberdevous in Deutschland " (' Zeitschr. d. deutschen G-eol. Ges., 

 Jahrg.,' 1885). Following Bargatzky and Maurer, the author selected a species 

 of Actinostroma as being the form described by Goldfuss as Stromatopora 

 coneentrica. In an appendix, however, the author states that he is now satisfied 

 that this identification is incorrect, though he still regards an Actinostroma as 

 being the true Stromatopora coneentrica, Goldf. A Stromatoporoid (apparently a 

 Stromatoporella) is identified with the Stromatopora stellifera of A. Romer ; and a 

 new species, of uncertain affinities, is described under the name of Stromatopora 

 philodymenia. In 1886, in his work entitled " Die Cyathophylliden unci Zaphren- 

 tiden des deutschen Mitteldevon " (' Palaeontologische Abhandluugen,' Beilin), 

 Herr Freeh discusses the nature of " Oaunopora," and concludes that the fossils 

 included under this name are the result of the commensal growth of a Stromato- 

 poroid with an Aulopora or a Syrmgopora. 



In 1886, Mdlle. Eugenia Solomko published a work on the Stromatoporoids 

 of the Devonian rocks of Russia (pp. 48, with two plates, St. Petersburg, 1886). 

 As it is written in Russian I have, unfortunately, been unable to read this memoir, 

 but an analysis of its contents is given by Waagen and "Wentzel in the 

 ' Palaeontologia Indica,' " Salt Range Fossils," ser. 13, vol. vii, 1887. Mdlle. 

 Solomko deals principally with points connected with the general structure of the 

 Stromatoporoids, and proposes a classification based upon the structure of the 

 skeleton-fibre. The Stromatoporoids are regarded as belonging to the Sponges 

 (Pharetrones) . No new species are described. 



In 1886, Mr. E. 0. Ulrich described and figured a species of Labechia from 

 the Cincinnati group of Ohio under the name of L. montifera (' Contributions to 

 North American Paleontology,' vol. i, p. 33, woodcut and pi. ii, figs. 9 and 9 a). 



