68 The Middle Devoxian Deposits of Maryland 



the south of the road on the creek bank the rocks are bluish and in 

 quite firm, eoarse layers. There is a steep dip toward the creek between 

 55° and 57°, N., 40° W. To the north of the pike along the road to the 

 mill the rocks are weathered to a greater extent, having a brownish tint 

 and containing in layers numerous specimens of Hamilton species. The 

 coarse blue shales on the creek bank and the brownish ones along the mill 

 road agree in lithologic characters with the coarser shales of the Hamilton 

 stage in New York. The following list gives a fair idea of the fauna of this 

 locality which would undoubtedly be increased by further search : Stereo- 

 lasma rectum Hall, cf. Amplexu^ lianiiltoniae Hall, Cystiphyllum ameri- 

 canum (?) Milne-Edwards and Haime, Rliopalonaria tenuis Ulrich and 

 Bassler, Monticulipora ( ?) marylaniensis Ulrich and Bassler, Lingulella 

 (?) paliformis Hall, Lingula delta (?) Hall, Lingula ligea (?) Hall, 

 Lingula cf. compta Hall and Clarke, rbiculoidea lodiensis (Vanuxem), 

 var. media Hall, Craniella liamiltoniae Hall, Stropheodonta (Leptostro- 

 phia) perplana (Conrad), StropTieodonta dernissa (Conrad), Stropheo- 

 donta (Douvillina) inaequistriata (Connxd) , Stropheodonta concava HaW, 

 Chonetes mucronatus Hall, Chonetes coronatus (Conrad), Chonetes 

 setiger ( ?) (Hall), Chonetes lepidus Hall, Chonetes vicinus (Castelnau), 

 Sti ophalosia truncata (Hall), Rhipidomella vanuxemi Hall, Rhipidomella 

 penelope Hall, Liorhijnchus laura (Billings), Tropidoleptus carinatus 

 (Conrad), Atrypa reticularis (Linne), Cyrtina hamiltonensis Hall, Spi- 

 rifer mucronatus (Conrad), Spirifer granulosus (Conrad), Spirifer 

 audaculu^ (Conrad), Spirifer angnstus (?) Hall, Spirifer (Beticularia) 

 fimhriatus (Conrad), Amhocoelia umbonata (Conrad), Ambocoelia vlr- 

 giniana Prosser, Anoplotheca (Coelospira) acutiplicata (Conrad), Vitu- 

 lina pustulosa Hall, Athyris spiriferoides (Eaton), Orthonota ( ?) parvula 

 Hall, Tellinopsis suhemarginata (Conrad), Buchiola halli Clarke, Nucula 

 corbuliformis Hall, Nucula bellistriata (Conrad), Nucula lirata (Con- 

 rad), Nuculites oblongatus Conrad, Nuculites triqueter Conrad, Palaeo- 

 neilo constricta (Conrad), Palaeoneilo plana Hall, Palaeoneilo maxima 

 (?) (Conrad), Palaeoneilo perplana var. grahaui Prosser, Palaeo- 

 neilo emarginata (Conrad), Palaeoneilo tenuistriata (?) Hall, Parallel- 

 odon hamiltoniae (Hall), Pterinea fiabellnm (Conrad), Leptodesma 



