THE MAKVLANI) (TCADS. 448 



tui'es is ;il)()ut i) cm. (>ii(> of thos(> is ohlicjuc .•md shows ovci- 10 cm. 

 The iii'catcst arc of the circumtVi-cncr is 25 cm. Tlio specimen is al.so 

 veiy coiiv(>x vei'ticaliy, and lliis arc measures 2() cm. 



The leaf scars of (\ Fonlniiicdiio are always veiy in-ejiuhir, and 

 this s])ecimen presents the anomal\- of havina; tlie shai-per vertical an<>;le 

 as often above as below. This at first made it doubtful what was the 

 ti'ue position of the ti'unk. But the vascular sti'ands, cl(>arlv seen on 

 both the radial fi-ac1ui-es, is conclusive as to the true position. The.se 

 .strands rise at a sharp angle from the fibrous zone, pass at- a much widei' 

 angle nearly straight thi'ough the cortical parenchyma, and then curve 

 graceful!}' outward into the leaf bases, sometimes l)ending somewhat 

 downward where these are slightly de.scending. The inner wall of the 

 wood, which was in contact with the medulla, shows over a concave 

 area of 10 cm. by 14 cm. alternating rows of elliptical scai's, o nun. by 

 15 mm. in diameter, of the medullary rays, the ujiwai'd inclination of 

 which is distinct. 



PI. LXXXVII. Fig. I, 1 is an end and top view of the Turner trunk, 

 W. C., B., Xo. 3046, more fully shown on other plates. 



PI. LXXXVII, Fig. Ill, 2, is a side and top view of the Griffith 

 trunk, \\ . C, B., Xo. 1467, another principal type of the species. The 

 terminal bud can be seen in this view, but the specimen had been sec- 

 tioned through the center of the bud before this group was photographed. 



PL LXXXVII, Fig. Ill, 6, shows the Xoah Donaldson trunk, W. C, 

 B., Xo. 1470, but not to good advantage. 



PI. LXXXVII, Fig. Ill, 8, is a very good side view of the Ritldle 

 fragment, W. C, B., Xo. 1488. This specimen probably contains 

 tlu'ee-quarters of the entire trunk. It seems to extend from at or very 

 near the true base to within a very short distance of the summit. It 

 is flattened laterally to a thin slab, and a piece of considerable size is 

 liroken away along an even vertical plane from one of the edges. A 

 large irregular piece has also disappeared from one side, reaching inward 

 to the middle and extending from the top downward to below the middle 

 on one edge but much less on the other. It is of a light-drab or fawn 

 color, with rust, stains at some places, firmly silicified and moderately 

 hard and heavy. It is 24 cm. high and has a maximum width of 26 

 cm. The missing piece added to this would probablj- give a width 



