198 FLORA OF LOWER GOAL MEASLTKBS OP MISSOURL 



of the leaf scars, the low position of the interior cicatrices, the absence of 

 transverse ridg-es in the cauda, and especially by the netted surface of the 

 broad border. The habit of the two oblique systems of cortical ridges is 

 suggestive of Sigillaria camptotmiia Wood. The normal species is generally 

 re^Dresented as having the margin stnated parallel to the sides of the bolsters, 

 the apices of the bolsters less attenuated, the foliar cicatrices proportionately 

 broader and more obtuse at the base. 



Localities. — The smaller specimen is probably from Owen's mine, U. S. 

 Nat. Mus., 6043; the other. No. 5280 of the Lacoe collection, U. S. Nat. 

 Mus., is said to have come from the same Adcinity. 



Lepidodendron scutatum Lx. 



PI. XLV, Fig. 4 ; PI. LI V, Fig. 5 ; PI. LV, Figs. 1,2; PL LXXII, Fig. 4. 



1879. Lepidodendron scvtatum Lesquereux, Goal Flora, Atlas, p. 11, pi. Ixiii, iigs. 6, 



U-c; text, vol. ii (1880), p. 269. 



1880. Lepidodendron setifoUum Lesquereux, Goal Flora, vol. ii, p. 370. 



But little that is definite is known of this species, the types of which 

 were communicated to Professor Lesquereux by Dr. J. H. Britts. The 

 largest of the types shown by Lesquereux, in fig. 6, pi. Ixiii, of the Coal Flora, 

 is now No. 5448 of the Lacoe collection. The original figure shows the 

 general form of the bolsters, the position of the leaf scar, and the aspect of 

 the vanishing cauda with its slight transverse grooves. It also gives a cor- 

 rect impression of the aspect of the cicatricial portion in many of the 

 bolsters. While, however, the bolster shows in most instances an irregular 

 conchoid, roundish, mutilated or torn spot in place of the leaf scar, as seen 

 in the illustration, there are a number of cushions in which the lower and 

 lateral angles of what appear to be transversely rhomboidal leaf scars are 

 seen. Traces of oval appendages are also visible at a little distance on 

 either side of the lower rounded angle. On the other hand, I have observed 

 no distinct supracortical evidence to wai-rant the detail delineated in fig. 6« 

 of the same plate. The same fragment of shale shows another section of 

 stem, agreeing in every detail of size and character, and apparently, from 

 its position and proximity, constituting the other branch in an equal 

 dichotomy. The countei'part of this is No. 5600 of the Lacoe collection. 



The present repository of the original of the two smaller figures given. 



