861 



Kept. 



hinge plates in their usual form, the other (upper) having 

 them much thickened, the crura diverging at their origin, the 

 other not; 9, dorsal, with hinge plates, dental fossets, foramen, 

 crura, and crural plates, and appendages ; 10, similar, but v^ith 

 hinge plates thickened and rounded, and crura branching near 

 the base; 11, diagram section of two valves joined, to show 

 crura and appendages (to support the breaking apparatus.) 

 Cumberland, Md., in the Oriskany saiidstone. VII. — In Bed- 

 ford Co., Pa., on Will's creek; numerous in bed 35 of Steven- 

 son's Hyndman section (T2, 86, 103) 50' below, and bed 39 

 104' to 168' below top of Oriskany sandstone. In Centre Co. 

 (T4, 431.) In Perry Co., Claypole's collections at Pisgah hill 

 (000, p. 141) are seven specimens marked 59-6 (12104) nearly 

 all casts, probably Eensselceria^ most nearly resembling casts 

 of jS. suessana^ but they may be only small individuals of E. 

 ovoides. Also eighteen marked 59-9 (12,107) of which the 

 same can be said (no spir. mucronata visible) ; also 50-19 

 (12114) ditto. (G. B. Simpson, 1889.) VII 



Eensselseria portlandica, Bill. Proc. Port. S. N. H. Vol. 

 1,1863. (S. A. M.)— F/. 



Reptaria stolonifera, Rolle, 1851, Leonhard and Brown, 

 NeuesJahrb., p. 810, Hamilton (S. A. Miller, 1889.)— In Penn. 

 collections, spec. SOl-11 (this hryozoon incrusting an Ortho- 

 ceras constrictum) from Marshall's falls, Monroe Co., Pa., ex- 

 amined by G. B. Simpson, 1889. (000, p. 210.) VIII g ? 



Retepora angulata. Hall (1852, Pal. N. Y. Vol. 2, p. 49, 



Clinton (Col- 

 lett's Indiana 

 Geo. Report of 

 1882, page 269, 

 plate 14, fig. 1, 

 portion of bry- 

 ozoon frond ; 

 fig, 2, a part of 

 it enlarged to 

 show the inter 

 sticial smaller 

 pores. (Van- 

 C 1 e V e d e ' 



