224 riUK'llF.DIS'CK of TIIK XATIONM, MVRIHIM. v.m.. XXI. 



j^^ciiciiilly Slink below Mic Icjif biisc^s Conniiij;- ^loovi'-s or dodp cliiiiiilxTS 

 hctwccii Micin, Ww sill fiuu'- I licii'lbrc consisting' cliiclly of (lie, liitlcr, in 

 tlio ni(»r<' iiltiionnal Conns of Hear doscribinj;' ii double cinvninni and 

 having; somcwliat t.lio sliajxi of ii " line. oC beanly," in pcninansliip or 

 on(^ of lli(^ parts of a, lliiddliist cross or "swasMca," soinctiim'S, liow- 

 ov(M-, pi(»i('('.|,i!i;j HO as {u leaver a. groove around I lie outer i'dyr of llio 

 convex siiininits oC the leal" bases; reprodiictivci organs lew, inor« 

 niiineroiis on tix' naii(t\ver sides of the trunk, disposed soinowhat in 

 I'ows or eliaiiis, <;('neri(lly parallel lo IIm< axis but soiiietinuvs rnnnin}i; 

 round the- trunk, more ov less coiili^iions, consisting; of protiil)eraiiccs, 

 soiiK* risinfi* ub<)V^^ tin', liijuln^st h'.af biisoH, <dosed, or more commonly 

 (►pen \\i tll(^ t(>|>, sometimes cral(M-lik<' but {jfenerally t rmicate*!, present- 

 iiij;' an irrej;nla,r siirCarce with numerous pits or poriss at the center 

 snrroMiKled by bract 8ciirs which are soinetiincH empty, but usually 

 occupied by the bas«^s of narrowly triangular or llattish bracts projec/t- 

 in^ and s(piarely trnncalt'd with tiiiii interspa(;es in miniature imitation 

 of the loaf bases; armoi- much thicker on the nariowe-r than on the 

 broader sides of the trunk, ."5 to (> cm. thi<^k in the ibiiner and 2 to 3 

 cm. in the latter case, clearly and ihWinitely marked oH" Irom the woody 

 axis by a ca-mbinm line; cortical paienchyma lo to LM) mm. thi(!k; sec- 

 ondary wood zone 10 to LM) mm., very line-grained and clearly marked 

 olT from the last ; medulla somewhat ellipti(;al, 5 to 8 cm. in diameter, 

 marked on its external surface by rows of small rhombic projections 

 of a: dark color terminating' in small longitudinal ridges representing 

 the origin of tlu^ medullary rays. 



The small, cylindrical seel, ion of a trunk ae-ipiired through I'rofessor 

 flenney's iiit<'r\'ent ion from Mr, L. VV. St ill w(dl, of 1 )eadwood, exhibited 

 HO many good chara(;te/rs, all dilferent from those of any other Hpecimen 

 in the IT. !S. National Museum collection that before I had se(!ii the 

 Yale cidlectioUj in fact, long before it was made, I had described it 

 as a new speci<',s aiiid mimed it for Mr. Stillwell. It was reportcMl to 

 have b<HMi found in tlu'. llhickluiwk region, and there is evc^ry leason to 

 believe that such was the case. 



The Yale <'(>llccti<»ii contains six si)(H;iinens of this s|khm(!S, each of 

 which adds somclhiiig to our knowledge of it. These.are Nos. 1(5, ^{(i, 

 5(1, 105, 107, anil 1 1!), The first three of these j)urport to come from the 

 IVIiniiekalila. region, while the others arecerlainly from tln^ lUaekhawk 

 region. The first ol' these is somewhat smaller than the type, and has 

 near its summit two small blanches. The leaf scars are normal and 

 (ionlii'in my suspicion that the i)e<',uliar form which they have in the 

 original specimen is due to lateral compression. It weighs nearly o kg. 

 No. M) represents the upper i)art of a trunk of exactly the sanu) diame- 

 ter as the Stillwell si)ecinien, but with the outer parts all worn away. 

 The summit, however, is i)erfect. The transverse fracture has supplied 

 a number of otherwise missing or imperfe(;tchara(;ters. This specimen 

 weighs 8. 1 7 kg. No. 50 is larger and entire from base to summit, but 

 broken in two near the middle. It is very ellii)tical in cross section from 



