FOSSILS OF THE CLINTON GROUP. 599 



occasionally in the shaly courses; here there is a considerable in- 

 crease in the number of interstitial cells in the monticules. A 

 frond from Todd's Fork measured 94 by 24 mm. and a second was 

 50 mm. broad. In the collection of the Ohio State University 

 occurs a specimen from Brown's Quarry. Prof. E. W. Claypole 

 collected this species at Yellow Springs, It occurs also atSiebold's 

 Quarry on Brandt pike. 



Phacnopora magna, Hall and Whitfield (Plate 28, Fig. 6; Plate 29, Fig. 2 

 a, b, c), Soldiers' Home, Brown's Quarry, with branches 5.5 to 7.3 

 mm. wide. Fauver's Quarry; in the cement of the conglomerate 

 at Belfast, Highland county, Ohio. 



Phaenopora multifida, (Van Cleve) Hall. (Plate 29, Fig. 3), Soldiers' 

 Home, Brown's quarry, with branches 3 mm. broad and 2 mm. 

 apart. Hanover, Indiana, very typical. 



Phaenopora fimbriata, James (Plate 28, Fig. 7), Soldiers' Home, Fauver's 

 Quarry, Centreville, Todd's Fork, Fair Haven, in the cement of 

 the conglomerate at Belfast, Ohio, 



Pachydictya emarcescens, Foerste, (Plate 31, Fig. 30 a, b) Eaton, Ohio. 



Pachydictya farcta, Foerste (Plate 31, Figs. 31), Eaton, Ohio. 



Pachydictya wcdis, Foerste (Plate 31, Fig. 32, 33), Eaton, Belfast, Ohio. 



Pachydictya emaciata, Foerste (Plate 28, Fig. 8), Soldiers' Home and 

 Fauver's Quarry. 



Pachydictya bifurcata (Van Cleve), Hall (Plate 28. Fig. 9). Soldiers' 

 Home, Fair Haven, Centreville, typical. At Brown's Quarry this 

 species occurs with narrower branches (4 mm. wide), with more 

 cells laterally in a distance of 2 mm. (=8 to 8.3 cells), but with 

 the same number of cells in 2 mm. measured longitudinally (=5.5 

 cells). At Brown's Quarry forms with 7 cells in 2 mm. measured 

 laterally, also occur. 



Pachydictya bifurcata, var. instabilis, Foerste (Plate 28, Fig. 10), Brown's 

 Quarry. 



Pachydictya turgida, Foerste ( Plate 28, Fig 11), Soldiers' Home, Fair 

 Haven. 



Pachydictya obesa, Foerste (Plate 28, Fig. 12), Soldier's Home. 



Trigonodictya Eatonensis, Ulrich. The Bryozoa of the Lower Silurian 

 in Minnesota, 1893, Eaton, Brown's Quarry. 



Stictopora similis, Hall. In the cementing material of the conglomerate 

 at Belfast, Highland county, Ohio. 



Rhinopora verrucosa. Hall (Plate 28, Figs. 13, a, b, c), Soldiers' Home, 

 Centreville, Fair Haven, Todd's Fork, collected at Yellow Springs, 

 by E. W. Claypole. Fauver's Quarry, Brown's Quarry, the 

 frondose variety. "Orthoceras" block at Huffman's Quarry, 

 also at Siebold's Quarry on Brandt pike. 



Hcmitnpa Ulrichi, Foerste (Plate 28, Fig. 2), Brown's Quarry, Yellow 

 Springs (E. W. Claypole's collection), Reed's Hill, common and 

 typical at Siebold's Quarry, Fauver's, Soldiers' Home, Huffman's. 



