256 SYSTEMATIC PALEONTOLOGY 



from 64 to 2740 fathoms but it is quite possible that this variety of the 

 form is iiot to be so regarded. 



Occurrence. — Aquia FoematioivT. 1 mile northeast of Piscataway. 



Collection. — Maryland Geological Survey. 



PuLViNULiNA scHEEiBEKSii (d'Orbigny). 

 Plate LXIV, Fig. 8. 



Botalina schreibosii d'Orbigay, 18i6, Foram. Fossiles Vienne, j). 154, j)l. vii, figs. 



4-6. 

 Fulvinulma schreibersii Bagg, 1896, BuU. 141, U. S. Geol. Survey, p. 92. 

 Pulvinulina schreibersii Bagg, 1898, BuU. Amer. Pal., No. 10, p. 87, pi. xxiii, fig. 2. 



Description. — Test orbicular^, superior side more convex than inferior; 

 consisting of about seven chambers in the final convolution (some speci- 

 mens sho^y nine); inferior side distinctly stellate with depressed septal 

 lines and elevated chambers, the latter feature being characteristic for 

 the species and distinguishing it from Pulvinulina karsteni, by lack of 

 peripheral keel. The final chamber is larger and more globose than the 

 one adjoining; umbilicus depressed on the inferior side; aperture a sub- 

 marginal slit; diameter, 0.4-0.54 mm. 



This species is not uncommon in the Eocene of Woodstock but seems 

 to be quite rare in the Miocene of James Kiver, Va. 



Eeferring to the depth at which this species is found in present oceans 

 Professor Brady says in the Challenger Eeport — " off New Hebrides 

 125 fathoms; off Ki Islands, 129 fathoms; southwest of Papua, 28 fath- 

 oms; off' Eaine Island, 155 fathoms; off Cape York, Torres Strait, 3-11 

 fathoms; Humboldt Bay, Papua, 37 fathoms; and oft' Admiralty Islands, 

 17 fathoms; ... off Bermuda, 435 fathoms. Parker and Jones record 

 its occurrence in the Eed Sea, 40 fathoms, and in the Mediterranean, 

 90 fathoms." 



Occurrence. — Nanjemoy Foemation. Woodstock, Well at Chesa- 

 peake Beach at 90-92 feet. 



Collections. — Johns Hopkins University, Maryland Geological Survey. 



