186 MESOZOIC FLORAS OF UNITED STATES. 



They thus form a re('tanfj;iilar piece from the middle of a trunk, showing 

 the outer surface at both ends. The central part of the radial fracture 

 is bounded by the inner wall of the woody zone and shows striations and 

 markings not widely different from those much better shown in the 

 type specimen. No. 500.62, which were described and figured. These 

 specimens represent a trunk about 14 cm. in diameter. 



PI. XLVII, Figs. 1, 2, show, respectively, the outer surface of Nos. 

 500.94 and 500.498. 



Cy( ADELLA COMPRESSA Ward. 



PI. XLVII, Fifi. 4: PI. XLVIII. 



I'JOU. L'ycadeUa compressa Wartl: Proc. AVash. Acad. Sci., \o\. I, p. 269; Tweutieth 

 Ann. Rep. U. S. Geol. Surv., 1898-99, Pt. II, p. 398, pi. xcvi; pi. xcvii. 



Five specimens in the second invoice and four in the third are 

 referred to this species with more than the usual confidence, and a number 

 with certainty. Nos. 100.228, 500.503, and 100.264 are nearly complete 

 small trunks typical of the species. The first of these closely resembles 

 the type No. 500.22 and the second the type No. 500.18. The third is 

 smaller than any of the original types. No. 100.290 is a very small 

 but apparently complete trunk weighing only O.IS kg., but it has the 

 general character of this species. It may be immature. The other 

 specimens are fragments, but No. 500.132 exactly resembles Nos. 500.68 

 and 500.69. Most of the rest have the same character. No. 500.503 

 weighs 0.74 kg.; No. 100.228, 0.75 kg., and No. 100.264, 0.31 kg. PI. 

 XLVII, Fig. 4, and PI. XLVIII, Figs. 1, 2, show these three specimens, 

 I'espectively, from their most characteristic sides. 



Cycadella jurassica Ward. 



PI. XLIX. 



1900. Cycadella jurassica Ward: Proc. Wash. Acad. Sci., Vol.. I, p. 270; Twentieth 

 Ann. Rep. V. S. Geol. Surv., 1898-99, Pt. II, p. .399, pl. xcviii-cxii. 



No large trunks of this species occur in the later collections, l)ut a 

 very large number of fragments were foimd which can not be referi'ed 

 elsewhere, and many of them show the typical characters so clearly 

 that there is no serious doubt of their specific identity. 



