214 riiOCEEDTNCS or THE NATTONAL MFFiEVM. voi, xxt. 



numerous ns tlic leaf scars, i)roj(;cting nnicli beyond tlic petioles, some- 

 times 3 cm, liigli, solid or variously broken and jagged, occasionally 

 somewhat c.avibms, scarcely showing any involucral scales, but in addi- 

 tion to all the other oigaus described are small angular bracts, mostly 

 broken down, ])resenting sharp e<lges and projections over the surface, 

 intermediate in clmracter between scales and leaves, i)roperly to be 

 classed as bristles or i)enilae; all the difCereiit ])rojecting oi-gans giving 

 the trunk a ragged iind horrescent appearance; armor, including pro- 

 jections, cm. thick, the vascular strands traceable far into the woody 

 zone and inner limit not definite; parenchymatous layer 15 mm. thick 

 ])enetrated by the whitened leaf bundles; secondary wood 2 cm. thick, 

 consisting of two nearly equal rings, the outer white, the inner black 

 or dark blue in the only specimen kn(nvn ; medulla cm. in diameter, 

 dark, limvgiained and homogeneous. 



This species is based on the single specimen. No. 104, of the Yale 

 collection from the Ulackhawk locality, which is somewhat less than 

 half of a. trunk that divided along a vertical plane from top to bottom 

 almost as smooth and even as if sawn through by a gang saw, eximsing 

 the interior in an a<lmirable manner. Its only aflinities are with C. 

 paynci, and the specimen, though smaller, has a remarkable resemblance 

 to No. 5 of the U. S. National Museum, which was cut through on the 

 same plane as this specimen. The resemblance is, however, more 

 apparent than real, and the descending leaves, and esjiecially the 

 inverted scars, clearly excbule it from that si)ecies. Add to this that 

 no specimens of C. jxit/nci have been found elsewhere than in the orig- 

 inal Minnekabta locality, and the imi)robability of this belonging to 

 that spe(ties is v(My great. It is too i)erfect a specimen to class as 

 undeterminable, and there seems no course left than to treat it as con- 

 stituting a new sjjecies. 

 » 



CYCADEOIDEA INSOLITA, new species. 



Trunks medium sized, unbrancluul, somewhat elliptical in cross 

 section, subcyliudrieal or sub(;onical; rock substance light colored, 

 moderately hard and heavy; height of trunks 30 to 40 cm., diameter 30 

 to 35 cm., girth about 1 meter; organs of the armor Jiearly horizontal; 

 leaf scars irregularly distributed over the surface, very variable in size 

 and shape, rhombic or subrhombic, in the latter case having the more 

 acute angle above and the more obtuse one below, that is, the oi)])osite 

 of the normal condition, 15 to 25 mm. wide, 8 to 15 mm. high, sonu'times 

 empty to some depth, but in some such cases the summits of the leaf 

 bases showing the vascular bundles in the form of little rods or pins 

 projecting upward and forming a row all around the leaf bases close to 

 the margin with others near the center, about 18 to each leaf; leaf 

 bases sometimes projecting in the form of small cones, in which cases 

 the bundles can be seen either as black dots or as little protuberances 

 around the sides of the cones; ramentum walls thin but variable, 1 to 

 4 mm., firm and sharp on the edges of the scars, gi'ooved along the 



