1188 



NEW YORK STATE MUSEUM 



FAUNA OF THE COEYMANS LIMESTONE 



20 Lower basal bed 



Lichenalia torta Hall, very abundant. 

 Interesting series of growth stages 

 of this bryozoan can be obtained in 

 the limestone back of the White lime 

 quarry. The colony starts as a 

 cornucopialike zoarium, which some- 

 times attains a length of 1^- inches 

 before it begins to assume an irregu- 

 larly flabellate form. An adult frond 

 nearly 6 inches in length was ob- 

 tained in the Delaware avenue 

 quarry. 



Spirifer cyclopterus Hall, c 



S. cpncinnus Hall, c 



S. perlamellosus Hall, r 



Rhipidomella oblata Hall, c 



R. oblata emarginata Hall 



Uncinulus mutabilis Hall, c 



Strophonella punctulifera {Conrad), c 



S. vanstriata {Conrad), c. Both flat 

 and highly convex varieties 



Gypidula galeata {Dalman), c. Not so 

 common in this bed as in the over- 

 lying beds. Form very variable, 

 from large weakly plicate to small 

 strongly plicate forms. Also indi- 

 viduals with bifurcating folds 



Chaetetes sphaericus Hall, c 



Meristella laevis {Vanuxem), r 



Rhynchotrema formosum {Hall), r 



Rhynchospira globosa Hall, r 



Rhynchospira sp. nor., c 

 Orthothetes woolworthanus Hall, r 

 Spirifer macropleurus {Conrad), r 

 Megambonia sp.? c 

 Strophonella leavenworthana, r 

 Leptaena rhomboidalis {Wilck.), c. 

 The concentrically corrugate form 

 with a high geniculation, like that 

 figured in Palaeontology of New York, 

 v. 3, pi. 19, fig. Ik 

 Atrypa reticularis Linne, r. Small in- 

 dividuals with regular fine radial ribs 

 Actinopteria textilis {Hall), r 

 Stropheodonta becki Hall, r 

 S. cf. planulata Hall, r 

 Dalmanella subcarinata Hall, r 

 Favosites helderbergiae Hall, common 



in very lowermost portion 

 Pholidops sp.? r 



Rhynchonella semiplicata Conrad, c 

 Bronteus barrandii Hall, r 

 Proetus protuberaris Hall, c 

 Dalmanites pleuroptyx {Green), c 

 D. micrurus {Green), r 

 Phacops logani Hall, c 

 Nucleospira sp.? r 

 Cyrtina dalmani Hall, r 

 I Orthoceras sp.? r. Annulated type 

 Bryozoa and some ostracods, unidenti- 

 fied.* 



21 Seven feet of massive dark gray limestone containing fos- 

 sils which are extremely difficult to extract. 



Lichenalia torta Hall, c Actinopteria textilis {Hall), c 



Dalmanites micrurus {Green), c Lamcllibranch, large, yen. ctsp. nor.? 



Gypidula galeata Dalman, c 



22 Eleavy bed of limestone, 11 feet thick, full of large crinoid 

 stems. The upper part of this bed has much black chert in thin 

 bands. Atrypa reticularis and the sponge, Hindia, are 

 common. 



Atrypa reticularis Linne, a 

 Gypidula galeata Dalman, c 

 Eindia fibrosa (Roemer), a 



Favosites helderbergiae Hall, c 

 Uncinulus nucleolatus Hall, c 

 Sponge, yen. et sp.? 



