338 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1916. 



Family MORACE^. 

 Ficus baueri Knowlton, n. sp. 



PLate LXXXIX, figure 2. 



Leaves of medium size and firm texture, 

 ovate, rather abruptly rounded to the appar 

 ently tnmcate base, acuminate at apex; mid- 

 rib strong, straight; secondaries three or four 

 pairs, very remote, alternate, at an angle of 

 45°, strong below, much thimier and almost 

 disappearing above, probably camptodrome; 

 norvilles thin, very obscure, oblique to the 

 midrib; fuier nervation not i-etained. 



The specimen figiu-ed, although it lacks a 

 considerable portion of the leaf, is sufficient to 

 give a good idea of this species. It is very 

 regularly ovate, about 115 centimeters in 

 length and 7 centimeters in greatest width, 

 which is .above the middle of the blade. It is 

 remarkable for its strong midrib and its few, 

 remote, alternate secondaries. 



This species is in a way of the tyjie of Ficus 

 denveriuna Cockcrell,' a weU-known Denver 

 species. It differs markedly in nervation, 

 however, as it has only three or four pairs of 

 very remote secondaries, while the Denver 

 form has not less than ten or twelve pains of 

 relatively close parallel secondaries. The man- 

 ner in which the secondaries reach the margin 

 is also very different in the two fonns, and 

 hence they can not be considered as at all 

 closely related. 



Occurrence: Fruitland formation, in cUnker 

 above highest coal bed, 30 miles south of 

 Farmington and 1 mile east of reservation 

 line, San Juan Basin, N. Mex. Lot 75 (6956). 



Ficus curta? Knowlton. 



Plate LXXXVIII, figure 3. 



Ficus curta Knowlton, U. S. Geol. Survey Prof. Paper 101, 

 p. — , pi. 42, fig. 5 (in press). 



The typo of tliis species comes from the 

 Vermejo formation of the Canon City coal 

 field, Colorado, and is described and figm-ed in 

 the report cited. 



The specimen here figured lacks most of the 

 margin, but so far as can be made out it appears 

 to agree with the leaf from Colorado. 



Occurrence: Fruitland formation, 30 miles 

 south of Fannington and 1 mile east of reser- 



1 A new name for Ficus spectabilis Lesquereux, which proved to be 

 preoccupied. See U. S. Geol. Survey Terr. Kept., vol. 7, pi. 33, figs. 

 4-0, 1878. 



vation line, San Juan County, N. Mex. Lot 

 75 (6956). 



Ficus prjBtrinervis Knowlton. 



Ficus pixtrinervis Knowlton, U. S. Geol. Survey Prof. 

 Paper 101, p. — , pi. 41, figs. 1-4; pi. 42, fig. 1 (in 

 pres.s). 



The types of this species come from the 

 Vermejo formation of the Raton Mesa region 

 of Colorado and New Mexico and are described 

 and figured in the report cited. It is a well- 

 marked and exceedingly abundant form in 

 the Vermejo formation and appears to be also 

 abundant and well defined in the San Juan 

 Basin. 



Occurrence: Fruitland formation, 30 miles 

 south of Fannington and 1 mile east of reserva- 

 tion fine, San Juan County, N. Mex. Lots 

 75 (6956) and 78 (6952). 



f^cus leei Knowlton. 



Plate XC, figure 2. 



Ficus leei Knowlton, U. S. Geol. Siu^'ey Prof. Paper 

 101, p. — , pi. 39, figs. 1-6; pi. 40, figs. 1, 2 (in press). 



The types of this fine species come from the 

 Vermejo formation of the Raton Mesa region 

 of Colorado and New Mexico and are described 

 and figured in the report cited. It is one of 

 the most abundant and well-marked forms of 

 the Vermejo formation. 



Ficus leei is also fairly abundant in the San 

 Juan Basin, though the leaves are somewhat 

 smaller than the average size of those from 

 the type area, but they do not otherwise 

 differ. 



Occurrence: Fruitland fomiation, Amariilo 

 Canyon, 10 miles south of San Juan River and 

 4 miles east of Chaco River, N. Mex., lot 16 

 (6958); 30 miles south of San Juan River and 

 4 2 miles east of reservation line, San Juan 

 County, N. Mex., lot 74 (6963). Kirtland 

 shale; 14 miles northeast of Pina Vcta China, 

 San Juan County, N. Mex., lot 40 (6966). 



Ficus prslatifolia Knowlton, n. sp. 



Plate LXXXVII, figure 4. 



Leaves large, broadly ovate, truncate or 

 slightly heart-shaped at base, probably obtuse 

 above; nervation strongly three-ribbed from 

 the top of the petiole, the midrib stronger, with 

 several pairs of subopposite secondaries high 

 up above the base; lateral ribs with six or 



