voi..xvi,j |'IU)(!FJ':i)IN(;S OF 'I'll 10 NATIONAL MUSEUM. 107 



]«!);t. 



No8. 21 ;iii(l ;}!) tiic tAvo slioit fnigineiitH 7""" wide- iiiid 7.5'"" loiij,'. 

 Kiwh shows iM>,iir its biisc. u slun-i stiiin|» of ji hitciul mcnib'T, juid al 

 tcni;it«'ly wif li tliis at tlio top, a lateral iiiciiilM'r wliicli is ;'>.5'=''" long and 

 4""" wide. The surface shows no struetural nijukings beyond three 

 longitudinal sti-ia*. It is very probable that these are fragments of a 

 fern stipe ()f species similar to No. 25, although it is also to beobscjived 

 that they bear a certain reseniblan<;e to highly altered specimens of 

 rsilophyton nerve recently brought under my notice. 



N(>. 25 is an imperfe(;t specimen, of which one side is wholly wanting. 

 It is 1.8''" wide and 22'"' long. On one side it shows the basal portions 

 of five pinnae with enlarg(Ml articulations. They are distant 3.5'''" and 

 O*"". The surfa(;e shows two coarse longitudinal i-idges and numeious 

 line striae. This is an undoubt<'d (Ji/clopieris,* and clos<'ly resembles a 

 specimen in the Teter Itedpath Museum of McGiil College, jnarkeil 6'. 

 Avadiea. 



No. 2(i <*onsists of narrow, leaf-like filaments 2""" Avide at the base, 

 but broadening u])ward to 4'"'". vVt a total length of *.)''" they are in- 

 comi)lete. They show no structuie beyond two nerves. They are 

 strongly suggestive of tlu', leallets of a (5yca.daceous ])lant. They are 

 also ecpiiilly suggestive' of tlu^ leaves of t^chizoiicura paradoxa Sch.t or 

 {}{' ^. Mcriani S<;h.| with which comparison should be made. |ri. ix, 

 Fig. 3. 1 



No. ;j consists of lin(;ar lilaments 2 to 4'"'" wide, with a somewhat 

 consi)icuous midrib or axis. A small fragment on the opposite side of 

 the stoiH', shows a branching similar to that of JIaluerltes, but as it is 

 not i<ii)ea(ed it might also be that of a root. It is a very problenuitical 

 specimen, which reciuires further nuiterial for determination. It is not 

 unlilu'ly that it rei>resents a. poorly preserved specimen of irali.scrifes 

 DechmianuN. [PI. ix, Fig. l.| 



No. 42.c(uisists of a, tuft of imrrowly linc^ar, simjde lihuneuts, appar- 

 ently leaves, about 0.75""" in dijiineter and u])wards of 14"" long. No 

 structure is ai)i)areiit, ami the s])ecimen is altogether too incomplete to 

 admit of refer(in(;e to a i)iiilicnl;ir speci(!S. | I'l. x, Vi<j;. 5.| 



DKTEKMINAELK SPE()IES.§ 



Specimens numbered S, 0, lO, 17, 18, H), 20, and .'Ui i)resent many 

 features in common. They all agree in their regular (li(!iio(omous divi- 

 sions and linear ramuli. None of Uwrn show signs of fructification, 

 while some are distinctly costate and others are not. 



*Rc,l)t. on FoHP. Pl.-intH of tli.^ l)(!v. and TI. Sil. of Canada, Cool. Siirv. of Can. 1871. 

 215; pi. XV. 



t.S(liini])(',r: 'I'raitr dc Pal. Foss., I'l. xiii, Fig. 8. 



tlhid., V\. XV, Fig. 1. 



$ I'» ••oniirction with my dotorniin.iiion of tlioae spocios, I dcairo to acknowledge 

 the courtoH.v with wiiicii J)r. W. (i. Farlow of Harvard llniv(!r.sity, placed at my dis- 

 posal hiH valnabld colh^tition of Marine Alg.ic; also to Dr. (J. L. CJoodalo for permit- 

 ting ndeienco to the largo collection of fossil plants in the Miisonm of Comparative 

 Zoology. 



