]\Iaiiylaxd Geological Survey 563 



Occurrence. — -Jennixcs Fou.matiox, CiiEiiuxG Me:n[ber. iSTatioiial 

 Eoad, G miles west of Frostburg; Oakland- Altaraont Eoad; Redhouse 

 Eoad, west of Green Glade Enn on road from Deer Park; Allegany Grove, 

 1750, 207C abundant; Cherry Creek; Bear Pen Run, near junction with 

 Savage River. 



Collection. — Maryland Geological Survey. 



CllOXETES SCITULU.S Hall' 



Plate L, Figs. 11-13 



Description. — This species is eomnion in the Chemung, less frequent in 

 the Parkhead. The Maryland individuals agree well with the typical 

 forms from Xew York. 



Occurrence. — Jennings For:mation, Chemung Member. Allegany 

 Grove, 2076; Town Creek, 2023, 2228; Fifteenmile Creek, 1 mile above 

 Little Orleans, 2215; Hancock, 2319, 2223; Millstone, 2225, 2322 abun- 

 dant. Parkhead Member. Rocky Run : Road 1 mile north of Rocky 

 Run, abundant; Williams Road, east of Cumberland, 1466 common; 

 Williams Road on Polish Mountain 1289, 1371, 1422. 



Collection. — Maryland Geological Survey. 



Chonetes rowei n. sp. 



Plate L, Fig. 19 



Description. — In association M'ith C. lepidiforntis at Millstone, occurs 

 a specimen here figured, a veiy transverse ventral valve bearing about 40 

 subequal, rounded and very irregularly bifurcating plications, the surfaces 

 "of which are minutely but distinctly spinous. This last is a most notable 

 feature for a shell of the genus Clionetes and has not been recorded before. 

 This single specimen is defective along the beak and it cannot be clearly 

 determined whether cardinal spines are or were present, but the expres- 

 sion of the shell favors the view that these chonetid characters existed. 

 We are not justified in regarding these spinules related to or structur- 

 ally connected with the papillose internal surface and exposed by exfolia- 



* For synonymy and description see p. 150. 



