174 



BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



tional Museum's collection are the Kuckers shale (C2), Baron Toll's 

 estate, near Jewe; the Wassalem beds (D3), at Uxnorm; and the 



Wesenberg limestone (E) at Wesen- 

 berg, Esthonia. 



Plesioty pes. —Cat. Nos. 57265, 57266, 

 57267, U.S.N.M. 



Specimens from the Wassalem beds 

 (D3), Uxnorm, and the Kuckers shale 

 (C2), Baron Toll's estate, are in the 

 collection of the British Museum. 



PSEUDOHORNERA OROSA (Wiman). 

 Text g. 91. 



Thamniscus orosus Wiman, Bull. Geol. Inst. 

 Univ. Upsala, vol. 5, pt. 2, 1902, p. 181, 

 pi. 6, figs. 8-11. 



This species is known to me only 

 from Wiman' s description and figures, 

 the latter being here reproduced. Judg- 

 ing from these, his Thamniscus orosus 

 is a typical Pseudoliornera, differing 

 from other species of the genus in its 

 frequently bifurcating zoarium, in the presence of large oval but 

 few apertures on the celluliferous side, and the distmct crest dividing 

 the noncelluliferous side longitudinally. 



a 



Fig. 90. — PSEUDOHORNERA BIFIDA, a, AN 

 ORDINARY SPECIMEN, NATURAL SIZE; 6, 

 NONCELLULIFEROUS SIDE OF A LARGER, 

 MORE COMPLETE ZOARIUM, X2; C, SUR- 

 FACE OF SAME, X4. Kuckers shale 

 (02), Baron Toll's estate, Esthonia. 



Fig. 91.— PSEUDOHORNERA OROSA. WiMAN'S VIEWS OF HIS SPECIES THAMNISCUS OROSUS; O AND 6, TWO 

 VIEWS, NATURAL SIZE, OF THE MANY-BRANCHED ZOARIUM; C, NONCELLULIFEROUS SIDE OF A SPECI- 

 MEN, XIO; d, CELLULIFEROUS SURFACE, XIO. BORKHOLM DRIFT, OjLE MYER, ISLAND OF GOTHLAND. 



Occurrence. 

 of Gothland. 



-Drift of the Borkholm limestone at Ojle Myr, island 



