EAELY PALEOZOIC BKYOZOA OF THE BALTIC PROVINCES, 157 



from the early Trenton of Trenton Falls, New York, and Montreal, 

 Canada, were described by Ulricli as Nematoj^ora guadrata, but fur- 



FiG. 77.— Nematopoea ovalis. a, zoaeium, natxteal size, of the foem described by Uleich as Nema- 



TOPOEA QTJADEATA; 6, PORTION OF THE SAME, X18; C, VERTICAL SECTI0N,X18; ^.TRANSVERSE SECTION, 



X50. Lower part of the Trenton limestone, Trenton Falls, New York, e, fragment of 

 Nematopoea ovalis, natural size, and x18, with five rows of zocecia;/, another fragment, 

 natural size and X 18, WITH only four rows. Lower part of the Teenton, Cannon Falls, Minne- 

 sota. (After Uleich.) 



tlier research on his part proved their identity with N. ovalis. Rus- 

 sian specimens have been found so far only in the Kuckers shale 

 (C2), Baron Toll's estate, Esthonia (Cat. No. 57251, U.S.N.M.). 



Represented in the col- ^ 

 lections of the British 

 Museum by a specimen 

 from the Kuckers shale. 

 Baron Toll's estate. 



NEMATOPORA FRAGILIS Ulrich. 



Text fig. 78. 



NematoforafragilisV'LUicu, 

 Geol. Surv. Illinois, 

 vol. 8, 1890, p. 646, pi. 

 29, figs. 10-lOc. 



V' 





FRAGMENT, NATURAL 



Fig. 78.— Nematopoea feagilis. 

 SIZE, showing mode of branching; &, portion OF the 

 same, x18; c, teansveese section, xso; d, veetical sec- 

 tion, x18. gleaedeau limestone, richmond group, 

 Alexander County, Illinois. (After Uleich.) 



Zoarium of very slen- 

 der, dichotomously divid- 

 ing branches about 0.35 

 mm. in diameter, with the zooecia arranged in six longitudinal 

 ranges not separated by a ridge. Seven zooecia in 4 mm., measuring 

 lengthwise. Apertures ovate, channeled posteriorly with a faint 



