EAELY PALEOZOIC BBYOZOA OF THE BALTIC PEOVINCES. 161 



well-preserved specimens of G. plumula may show a still closer 

 relationship, in fact possible identity with G. disticha. 



Occurrence. — Drift, Ojle Myr, island of Gothland; Borkholm lime- 

 stone (F2), at Borkholm, and Lyckholm limestone (Fl), Kertel, on 

 the island of Dago, Esthonia (Cat. No. 57254, U.S.N.M.). 



Fig. 81. — Glauconome steigosa. Wiman's figures of this speoes, desceibed by him as "species 

 NO. 1;" a and 6, two feagments, natueal size; c, view, XIO, op the celluliferous face; d, side 



view, XIO, showing the STEIATED, NONCELLtlLIFEEOUS SIDE AND AN ADJOINING EOW OF ZOCECIA; e, 

 TEANSVEESE SECTION, XIO, ILLUSTEATING THE STEIATED BASAL SIDE AND FOUE EOWS OF ZOCECIA OPENING 

 ON THE CELLTHJFEEOUS SIDE. BOEKHOLM DEIFT, OjLE MtE, ISLAND OF GOTHLAND. 



GLAUCONOME STRIGOSA (Billings). 



Text fig. 81. 



Eelopora strigosa Billings, Cat. Sil. Foss. Anticosti, 1886, p. 37. 

 Neviatopora strigosa Ulrich, Geol. Surv. Illinois, vol. 8, 1890, p. 645. 

 Species No. 1, Wiman, Bull. Geol. Inst. Univ. IJpsala, vol. 5, pt. 2, No. 10, 1902, 

 p. 181, pi. 6, figs. 29-33. 



A single well-preserved specimen of Glauconome from the Borkholm 

 limestone at Borkholm presents all of the characters seen in the 

 American form described by Billings as Helopora strigosa. The 

 American types have not yet been illustrated, but I am basing my 

 identification of the species mainly upon examples in the collection 

 of the United States National Museum which have been compared 

 directly with Billings's described specimen. Wiman's views of his 

 ^'Species No. 1," herewith reproduced, serve very well for the identi- 

 fication of the species. As seen from them, the zoarium is a narrow, 

 branched stem 0.5 mm. in diameter, with ovate zooecial apertures 

 arranged in four or five rows, and the remaining portion of the surface 



