. Bulletin - United States National Museum. Science. EAELY PALEOZOIC BEYOZOA OF THE BALTIC PROVINCES. 343 CALAMOPORA RETICULATA Eichwald. Text fig. 218. Calamopora reticulata Eichwald, Lethaea Rossica, vol. 1, 1860, p. 469, pi. 23, figs. 6 a, h. The Ordovician specimen figured by Eichwald under the above name is probably a well-preserved fragment of HemipJiragma panderi (Dybowski). This identification can not of course be made positively without a study of the figured example, but the ramose zoarium, shape of zooscia, absence of mesopores, and especially the arrangement of the numerous acantho
. Bulletin - United States National Museum. Science. EAELY PALEOZOIC BEYOZOA OF THE BALTIC PROVINCES. 343 CALAMOPORA RETICULATA Eichwald. Text fig. 218. Calamopora reticulata Eichwald, Lethaea Rossica, vol. 1, 1860, p. 469, pi. 23, figs. 6 a, h. The Ordovician specimen figured by Eichwald under the above name is probably a well-preserved fragment of HemipJiragma panderi (Dybowski). This identification can not of course be made positively without a study of the figured example, but the ramose zoarium, shape of zooscia, absence of mesopores, and especially the arrangement of the numerous acanthopores recall the HemipJiragma. CALLOPORA LIGNIFORMIS Dybowski. Plate 5, fig. 5, 5 a. Callopora ligniformis Dybowski, Die Chaetetiden der Ostbaltischen Silur-Form., 1877, p. 116, pi. 4, figs. 5, 5a. According to Dybowski, the zoarium of this species is of cylindrical, solid, ramose, smooth branches, with an internal structure much like his Callopora nummiformis. I have not come across specimens mth these characteristics and can not place the species. Occurrence.—Probably in the Wassalem beds (D3), Wassalem and Erras, Esthonia. CALLOPORA PIRIFORMIS (Eichwald). Plate 5, figs. 6, 6a, 66. Dianulites piriformis Eichwald, Zool. spec, vol. 1,1832, p. 181, pi. 2, figs. 1, 2. Chsetetes piriformis Eichwald, Lethsea Rossica, vol. 1, 1860, p. 478. Callopora piriformis Dybowski, Die Chaetetiden der Ostbaltischen Silur-Form., 1877, p. 117, pi. 4, fig. 6 a, Fig. 218. —Calamopoka RETICULATA. a AND 6, ZOARIUM NATUltAL SIZE AND SURFACE EN- LARGED. "WALD.) (After Eich- Although this species seems to have been fairly well figured by Eichwald and later by Dybowski, I am unable from either their descriptions or figures to place it definitely. Dybowski mentions the great resemblance of its internal structure to that of his Callopora nummiformis (= Hallopora ? dyhowskii), but his figures, although bearing out his remarks in part, show an almost complete absence of diaphragms in the zooecia
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