330 Barber. — On Nematophycus Storriei , nov . sp. 
sole representatives of the algae which exhibit structure in 
the fossil state. 
The protracted discussion between Sir William Dawson, on 
the one hand, and Mr. Carruthers on the other \ together with 
the careful anatomical description by Professor Penhallow 1 2 , 
has presented us with a clear impression concerning the nature 
and affinities of Nematophycus, as far as these can be judged 
in the total absence of reproductive organs. 
Thus far, the only detailed descriptions have related to one 
plant — N ematophycus Logani ; and, consequently, the full 
treatment of any new species will add considerably to our 
conceptions of this remarkable genus. 
While examining the slides of Pachytheca in the possession 
of Mr. Storrie at Cardiff, specimens of Nematophycus were 
placed before me, which appeared to me to differ in several 
important points from the published descriptions of N. Logani , 
and a subsequent examination of a specimen of the latter 
fossil, kindly communicated to me by Sir William Dawson, 
confirmed me in this impression. The description of this 
new species forms the subject of the present paper; and, as 
a tribute to the energy displayed by Mr. Storrie in collecting 
the specimens, and the skill with which he has prepared the 
microscopic sections, both of this fossil and of Pachytheca , I 
propose to call the Cardiff fossil Nematophycus Storriei. 
The locality and horizon from which the Cardiff specimens 
were collected have been detailed in a former paper on the 
structure of Pachytheca 3 . The small pieces of Nematophycus 
are found in the same layers as the specimens of Pachytheca , 
and occur in the Tymawr quarry near Cardiff, in rocks of about 
Wenlock age. 
1 Literature quoted by Penhallow : — Journ. Geol. Soc. xv. 484 ; Aug. 1881, 482 ; 
May 1882, 104; Geol. Surv. Can. 1863, 401 ; 1871, 16; 1882, II. 107; Can. Nat. 
(NewSer.) vii. 173 ; Ann. and Mag. Nat. Hist. 5, ix. 59 ; M. Micr. Journ. viii. 160 ; 
x. 66, 208; xi. 83 ; Quart. Journ. Micr. Sc. xiii. 313; Amer. Nat. v. 245, 185; see 
also Dawson Geol. Hist, of Pits. 
2 On Nefnatophyton and allied forms, &c., Trans. Roy. Soc. of Canada, VI. iv. 
1888. 
3 Annals of Botany, v. 145, 1891. 
