HUDSON RIYER BEDS NEAR ALBANY 545 



Conradella compressa, Hall sp. r 



Pterygometopus callicephaluis, Hall. sp. r 



Iso-telus cf. gigas, De Kay. c 



Macronotella ulrich sp, n, r 



Bollia sp. n. T 



In pebbles of a very fine grained, dull black limestone were 

 found : 



Gallopora ampla, Vlrich. e 



O. multitabulata, LlricJi. c 



Dalmanella testudinaria, Dalman sp. c 



Platystfophia biforata, Sclilotheim sp. c 



Plectamibonites sp. n. aff. gibboisa, Winchell & Schuchert. cc 



Ohristianla trentonensis sp. n. r 



Eccyliopterus sp. n. r 



Pterygoinetopus calliceplialus, Hall sp. c 



Ceraurus pleurexanthemus, Hall, r 



Conularla trentonensis, Hall. Yoiung specimen, r 

 The matrix contained: 



Pachydictya sp. c 



Stromatocerium sp. cc 



Kafinesquina alternata^ Emmons sp. c 



Plectambonites sericea, Sowerly sp. var. aspera, James, r 

 . Strophomena incurvata, SJiepard sp. r 



Plectambonites, sp. n. aff. gibbosa, Winchell & Schuchert. r 



Of these forms Strep telasma corniculum occurs, 

 according to Hall, principally in the lower Trenton; Winchell 

 and Schuchert report it from the lower and middle Trenton; 

 Callopora ampla and multitabulata are both Black 

 river and lower Trenton forme in the west; P a ch y d i c I y a is 

 principally developed in the lower and middle Trenton; S tro - 

 phomena incurvata occurs according to Hall in the lower 

 Trenton at Middleville^ is reported by White from the same bed 

 with Diplograptus amplexicaulis, and may there- 

 fore, rise into the middle Trenton; and in the west it is princi- 



*The new fossils of this and the next station will be described In a 

 separate paper. 



