. Bulletin - United States National Museum. Science. 92 BULLETIN 77, UIsriTED STATES NATIONAL MUSEUM. ANOLOTICHIA RHOMBICA, new species. Plate 2, fig. 9; plate 6, figs. 6, 7; text fig. 29. Dianulites rhombicum Dybowski, Die Chaetetiden der Ostbaltischen Silur- Formation, 1877, p. 33, pi. 1, fig. 9. Not Chsetetes rhombicus Nicholson, Quart. Journ. Geol. Soc. London, vol. 30, 1874, p. 507, pi. 29, figs. 11-116. This well-marked form, for which I have adopted the specific name applied to it by Dybowski, is a common and characteristic fossil of the Wesenberg beds. It was intelligently described by
. Bulletin - United States National Museum. Science. 92 BULLETIN 77, UIsriTED STATES NATIONAL MUSEUM. ANOLOTICHIA RHOMBICA, new species. Plate 2, fig. 9; plate 6, figs. 6, 7; text fig. 29. Dianulites rhombicum Dybowski, Die Chaetetiden der Ostbaltischen Silur- Formation, 1877, p. 33, pi. 1, fig. 9. Not Chsetetes rhombicus Nicholson, Quart. Journ. Geol. Soc. London, vol. 30, 1874, p. 507, pi. 29, figs. 11-116. This well-marked form, for which I have adopted the specific name applied to it by Dybowski, is a common and characteristic fossil of the Wesenberg beds. It was intelligently described by Dybowski, who, however, very erroneously considered it to be the same as Nicholson's Chsetetes rhombicus. The latter is a synonjrm of Chsete-. FlG. 29.—ANOLOTICHIA EHOMBICA. tt, TANGENTIAL SECTION, X20, WITH PORTION OF A MACULA EEPEE- SENTED; &, ANOTHER TANGENTIAL SECTION, X20, "WITH THE LTJNARIUM INCONSPICUOUS, BUT EXHIBITING CONNECTING PORES; C, VERTICAL SECTION, X20, WITH STRUCTURE OF WALLS AND CONNECTING PORES visible; d and e, two portions of a vertical section cutting the walls both vertically and LONGITUDINALLY, AND EXHIBITING THE CONNECTING PORES. WeSENBERG LIMESTONE (E), WeSENBERG, Esthonia. tes (now Rhombotrypa) guadrata Rominger, a very abundant ramose trepostomatous bryozoan highly characteristic of the Richmond group in North America. The only point of agreement between the two species is the frequently rhombic shape of their zooscia, the one character that misled Dybowski. Through the courtesy of Dr. Mikliailowski, I have had the opportunity of studying an authentic specimen, indeed probably the type-specimen, of Dybowski's Dianu- lites rhoTubicus, and I am, therefore, able to make the above identifica- tion with certainty. The zoarium of Anolotichia rhombica is of thin, free, undulating masses with a wrinkled epitheca on the basal side and a smooth^. Please note that these images are extracted from scanned page images that may have been digitally enha
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