THE MARYLAND CYCADS. 427 



ness 10 cm., more or less. The arc of the outer surface measures 25 

 cm.; that of the inner surface about 16 cm. (Locahty: PL LXXX, 

 No. 106.) 



PL LXXXVII, Fig. IV, 13 shows most of one side of the Tubbs 

 fragment, W. C, B., No. 1192, the first specimen obtained by Mr. Bib- 

 bins. It is a small segment from the side of what seems to have been 

 a large trunk. A surface view of the fragment is somewhat wedge 

 shaped, the smaller end downward and truncated. This surface is very 

 much worn, so much so on one side as to have nearly obliterated all 

 the markings. On the inner side it consists of a triangular segment 

 of the woody zone sloping upward and downward and presenting a 

 sharp inner edge horizontally across the specimen. The color of the 

 outer parts is a lively red, such as that of the paint stones and clays 

 of the iron-ore belt. Internally it is light colored. The substance is 

 hard and fine grained, giving it a high specific gravity. The height 

 is 18 cm., the maximum lateral surface shown, including a slight curva- 

 ture, 19 cm., while below it is only 10 cm. across. The radial distance 

 from the surface to the sharp ridge above described is 12 cm. (Locahty: 

 PL LXXX, No. 46.) 



PL LXXXVII, Fig. IV, 14, represents the Morgan trunk, or rather 

 fragment, W. C, B., No. 3051, a somewhat triangular fragment from 

 the thin side of a vertically compressed trunk, the tangential and radial 

 fractures being at right angles and passing through the armor into the 

 woody zone. The color is whitish pink, very delicate, unhke that of 

 any other specimen in the collection. The substance is rather soft and 

 friable. The maximum length in a tangential direction is 21 cm., the 

 radial thickness 13 cm., and the third dimension or vertical thickness is 

 12 cm. The fracture in this last direction is triangular, being parallel 

 to the leaf bases on each side, forming a sharp ridge of wood within. 

 Twenty-four centimeters of the circumference is preserved and the dis- 

 tance from bottom to top over the curved surface is the same. (Locality : 

 "Anne Arundel County.") 



PL LXXXVII, Fig. V, 2, shows the Harrison fragment, W. C, B., 

 No. 1486. It is a small fragment consisting entirely of the armor or 

 bark from the side of a trunk of unknown dimensions. It is very well 

 preserved, is of a brown color without and much lighter within, soft, 



