THE M.\1!VI,AM) CVCADS. 441 



the leaf bases, I'aiiicntuiii walls, fihci's, etc. The rock is of a vvd coloi', 

 as if stained with the paint in which it was douhtless lon<2; emlxMlded. 

 It is dai'k and heavy and hitihly niinerali/.(Ml, especially on the interioi' 

 pai'ts, wiiicii tia\-e a crystalline sui-fac(> with numerous frost-like pi-ojec- 

 tions. The speciinon is 17 cm. in dianuMer. The partial diameter 

 measured from th(^ cii'cumference throujjli the center to th(> vei'ticnl frac- 

 ture is 11 cm., which shows that this would have l)(>(>n the majoi' axis of 

 a somewhat elliptical cross section. The v(>rtical thickness is between 

 cm. and 7 cm. 



Two other specimens referred to this species are not fifjui'ed and 

 may be mentioned hei-e. One of these is the R. T. Donaldson fragment, 

 No. 5, W. C, B., No. 3327, a very small piece, measuring 8 cm. in tan- 

 gential, 8 cm. in radial, and (i cm. in vertical direction. It consists 

 chiefly of a piece of the wood, and could not have l)een recognized as a 

 cycad but for a small portion of the armor attached to one side containing 

 one leaf scar and one fruiting axis. 



The other is the R. W. Clark fragment, W. C, B., No. 3350, a very 

 small piece of a trunk of imknown size, showing a little of the external 

 surface and extending in a wedge-shaped manner a short distance into 

 the axis. It is rathei' light colored, with rust streaks, and soft sandy in 

 structure. It is 8 cm. in a tangential direction and 4 cm. in a direction 

 parallel to the axis of the trunk. Its radial thickness is a little over 

 6 cm. The surface shows a fe\y imperfect leaf scars. Two projecting 

 reproductive organs are present on the small area exposed. 



The reference of all these fragments to Cycadeoidea F<»daincana is, 

 of course, more or less doubtful. The South Carolina College cycad 

 clearly belongs to this species. 



The following is a list of the numbers, with the names assigned 

 and the weights: 



Weight in 

 kilograms. 



Maryland Academy Cycad, No. 3 2. 53 



Maryland Academy Cycad, No. 4 1 . 72 



^outh Carolina College Cycad _ 5. 56 



W. C.,B.,No. 1 MiT.theC.rifnthtriink ^ S. 00 



W. C, B., No. 1470, the Noah Donaldson trunks _ 3. 18 



W. C, B., No. 1473, the R. T. Donaldson fragment, No. 1 .45 



W. C, B., No. 1485, the Cronmiller fragment 1 . 42 



