124 MESOZOIC FLORAS OF UNITED STATES. 



species. As, however, there is no marked difference except size to 

 separate it, I will describe it as a variety of G. Huttoni, with the variety 

 name magnifolia. The normal Huttoni leaves are much smaller. 



PL XXX, Fig. 8, gives a normal leaf with segments of the most 

 deeply cut kind. Fig. 9 shows this slightly enlarged. Figs. 10 and 11 

 represent one of the smaller leaves with broad segments. Fig. 12 gives 

 one of the smaller leaves with proportionally longer segments, more 

 elliptic in form. PL XXXI, Fig. 1, shows a leaf with very wide, short 

 segments. Fig. 2 gives a portion of a leaf which has a greater number 

 of segments than is common and which approaches the digitata type. It 

 is shown slightly enlarged in Fig. 3. 



The plant is most abundant at locality No. 7 and is common also 

 at locality No. 2. It occurs not rarely at locality No. 19. 



Ginkgo Huttoni magnifolia Fontaine n. var. 

 PL XXXI, Figs. 4-8; PL XXXII, Figs. 1, 2. 



The form distinguished as Ginkgo Huttoni 7nagnifolia is pretty con- 

 stant in character and, as stated, may really be a new species. The 

 length of none of the leaves is preserved entire. The width may be 

 made out very well from some of the specimens and the length may be 

 estimated. It differs from G. Huttoni in the great width and length of 

 the segments. As in G. Huttoni, they are normally four in number, and 

 in general form they agree well with those of the specific type. Some of 

 the leaves, as made out from the specimens, must have been 12 cm. 

 wide in their widest part, and probably were 9 cm. from base to summit. 

 The petiole is strong and very long. A portion of one was seen 6 cm. 

 long. Some of the segments of the leaf were obtained from 25-30 mm. 

 wide. The nerves are strong and rather remote. 



PL XXXI, Fig. 4, shows the most complete leaf obtained of the 

 smallest kind. It does not have the ends of the segments preserved. It 

 retains a portion of the petiole, which shows the stoutness. The petiole 

 and one of the sides are shown slightly enlarged in Fig. 5. Figs. 6 and 7 

 show a fragment that may give an idea of the length attained by the 

 segments, although their tips are wanting. Fig. 8 shows a fragment of 

 a leaf from which an idea of the great width of the segments may be 

 obtained. PL XXXII, Figs. 1 and 2, give a fragment of a very large 



