887 



Rhyn. 



F I. Hall, Geol. 4th District N. Y., 1843, plate figure, 14, 3, 4, 

 and 4^. Niagara^ V 6. 



Rhynchonella dawsoniana, Davidson. Dawson's Aca- 



t\\\. i.^^^-. ^^ dian Geology, 1868, p. 294, 



fig. ^3, natural size and 

 magnified ; smooth, o r 

 with 8 to 12 slightly 

 marked ribs ; not rare in a 

 black Lower Carloniferous limestone at Lennox passage, Nova 

 Scotia. Not unlike the larger Camerophora [Terelratula) su- 

 per stes^ De Veneuil (Davidson.) XI? 



Rhynchonella dentata {Atrypa dentata^ Hall, Pal. N. Y. 

 ,„^ ... .3. ... ,, Yo\,l,im.Hud, 



Daw 



Pal. 



Ohio. 



Vol.1. 



pi. XI. 



Kiver.) Eal.Ohio, 

 Vol. 1875, page 

 121, plate 11, fig. 

 Za. Dorsal view 

 of a specimen with the usual two muscular plications on the 

 mesial fold; 3 J, side view; 3 o, ventral, showing the single 

 plication in the sinus ; 3 d^ dorsal view of another specimen 

 showing a rudimentary plication, somewhat raised, on each 

 side of the usual two. The Ohio shells are even more like 

 Davidson's E. diodonta^ British Sil. Brachiopods, plate 21. New 

 York specimens doubtfully referred to Trenton limsstone ; 

 Ohio and Indiana specimens (from about Richmond) are got 

 from top of Cincinnati [Hudson river) slates. Illh. 



Rhynchonella dotis. See Stenoschisma dotis. VIII c, 



Rhynchonella dubia. {Atrypa duUa, Hall, Pal. N. Y. 

 ara. ^B Vol. 1, 1847, Oh^zy.) Emmons, Amer. Geol. I, ii, 

 193, plate 3, fig. 23 ; ventral beak small and incurved ; 

 about 30 folds. Chazy limestone, II &. 



Rhyn chonella duplicata. See Stenoschisma dupllcatum, 

 Hall. VIII g, — This seems to be Spec. 12,217, ticketed Rhyn- 

 chonella contracta (J. Hall, 1888), from Perry Co., E. of Comp's 

 mill, VIII g, — Also 12,270, from near Bloomsburg, Columbia 

 Co, Also 12,369 and 12,3777, from Stony Brook. N. of Blooms- 

 burg. VIII g. 

 29 



