1 L3 
Liodema mvltiporum n. sp. (Page 34., 
[See also PL XI, figs. 4 6; PL XXVII, fig. 20.] 
Via. is. A zoarium, / 2, incrusting an Atrypa. 
Rochester shale, Lockport, N. V. 
Lioclema pectdian n. sp. (Page 35.) 
(Sec also PL XXV, fig. 13.] 
19. A vertical section, / 20, showing two layers of zocecia. 
20. Tangential section, / 20, exhibiting the many small acanthopores. 
21. Several zocecia and mesoporcs, X 35, showing the wall structure. 
22. Surface of one of the types, / 20. 
Rochester shale, Lockport, X. V. 
Figs. 1 to 1 are copied from Ulrich, Geological Survey of Illinois, V! 1 1 ; 7 to 9 from Hall, 
Natural History of New York, Paleontology II; 16 and 17 from Ulrich, American Paleo- 
zoic Bryozoa. 
