Maryland Geological Survey 473 



ing secondaries which are not connected distad by relatively flat arches. 

 The writer includes under this species the S. tenuinervis of Fontaine 

 recorded from the localities near Brooke, Virginia, and from Fort Foote, 

 Maryland. The only apparent ground for its erection was a fancied 

 difference in venation based chiefly on a more slender midrib and more 

 remote leaflets, both characters which are seen to be variable and alto- 

 gether unreliable as soon as any number of specimens are compared. 



The specimens from Deep Bottom, Virginia, which formed the basis 

 for the species Aralia duhia Fontaine (Aralia Fontainei Knowlton) are 

 doubtfully included under this species since they seem to represent a 

 macerated and distorted specimen of the terminal leaflets of a Sapindopsis. 

 There is absolutely no ground for retaining it in Aralia. 



Occurrence. — Patapsco Formation. Near Brooke, near Widewater, 

 Deep Bottom (?), 72-mile post, near 72-mile post, Aquia Creek, White 

 House Bluff, Virginia,^ Ft. Foote, Stump Neck, Maryland. 



Collections. — U. S. JSTational Museum, Johns Hopkins University. 



Sapindopsis brevifolia Fontaine 

 Plate LXXXVII, Figs. 2-5 



Sapindopsis brevifolia Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 

 1889, p. 300, pi. cliii, fig. 4; pi. civ, figs. 1, 7; pi. clxiii, fig. 3. 



Sapindopsis brevifolia Fontaine, 1906, in "Ward, Mon. U. S. Geol. Surv., vol. 

 xlviii, 1905, pp. 481, 482, 528. 



Sapindopsis brevifolia Berry, 1910, Proc. U. S. Natl. Mus., vol. xxxvili, p. 

 644. 



Description. — Leaves odd-pinnate, the terminal leaflet considerably 

 larger than the lateral leaflets of which but two pairs are known. These 

 are opposite. Leaflets somewhat crowded so that their margins often 

 overlap, with subacute tips, varying in length from 2 cm. to 5 cm. and in 

 width from 0.8 cm. to 1.6 cm., averaging about 3 cm. long by 1.3 cm. 

 wide. Inequilateral toward the base and showing considerable variation 

 in decurrence even among the few specimens known, in some the rachis 

 is conspicuously winged while in others the leaflets are all petioled, the 



^ Table on p. 586, Mon. xlviii, gives Colchester road as an additional locality, 

 which is not mentioned in the text. 



