10 PEOCEEDINGS OF THE I^ATIOISTAL, MUSEUM vol.74 



Tyye locality. — U. S. G. S. station 1/222, right bank of Meherrin 

 Eiver at Murfreesboro, N. C, basal bed exposed at water level and a 

 little above. (W. C. Mansfield, collector.) 



The new subspecies differs from the species mainly in having much 

 closer and stronger concentric primary lamellae and fewer secondary 

 intermediate s]Diral threads. Is also much smaller. The dimensions 

 are proportionally the same. 



Occurrence. — Yorktown formation, zone 1. Known only from type 

 locality. 



EXPLANATION OF PLATES 



Plate 1 



JFiGS. 1,3. Pisania (Celatocomps) burnsi, new species (X 2) ; type; alt. 28 mm.; 

 page 4. 



2.8. Fossarm {Isapis) urbanndensls, new species (X 8); type; alt. 



7 mm. ; page 6. 

 4. Clathrodrilliaf belloides rushmerettsis, new subspecies (X 8) ; type; 

 alt. 11 mm. ; page 2. 



5.9. Ftisinus (Duccinofusus) propeparilis, new species. Fig. .5 (X 3), 



fragment of the early wliorls of a specimen collected by Frank 

 Burns at Grove Wbarf, lower bed, left bank of James River 

 (Cat. No. 146148, U.S.N.M.) ; Fig. 9, type (X IVa) ; alt. 83 mm.; 

 page 3. 

 6,7. Columhella (Seminella) smiihfieldcnsls, new species (X 8); type; 

 alt. 3.8 mm. ; page 4. 

 10. Epitonium smith fielden sis, new species (X 3); type; alt. 12 mm.; 

 page 5. 



Plate 2 



Fig. 1. Pecten madisonius Say, variety (natural size) : Left valve of another 

 show the form occurring in the same bed with Pecten cboreus urianna- 

 imsis. Collected from zone 2, St. Marys formation, at Grays Creek, 

 Surry County, Va. (Cat. No. 370830, U.S.N.M.) 

 2. Pecten eboreus urbannaensis, new subspecies (natural size) : Right valve 

 of cotype ; latitude 107 mm. ; page 6. 



Plate 3 



Fig. 1. Pecten madisonius Say, variety (natural size) : Left valve of another 

 specimen from the same locality as specimen, fig. 1, plate 2. 

 2, Pecten eboreus urbannaensis, new subspecies (natural size) : Left valve 

 of cotype ; latitude 104 mm. ; page 6. 



Plate 4 



Figs. 1,2. Thracia {Cyathodonta) dalli, new species (X l^o) ; type. Fig. 1, left 

 valve; latitude 33 mm.; Fig. 2, right valve; latitude 34 mm.; 

 page 7. 

 3,4. Crassatellite^ {Crassatellites) meridionalls urbannaensls, new sub- 

 species ; type. Fig. 3, right valve, natural size ; latitude 100 mm. ; 

 Fig. 4, beak of same specimen ( X 5) ; page 9. 



i 



