ONYCHIOPSIS. 49 
V. 1069. Pl. III. Fig. 4. Ecclesbourne. 
Presented by P. Rufford, Esq., 1885. 
V..2151. Pl Vi. Big. 2. 
V. 2159. Pl. III. Fig. 3, and Woodcut, Fig. 4, p. 50. 
V. 2159a. Woodcut, Fig. 5, p. 50. 
Ecclesbourne. 
Rufford Coll. 
In Pl. IIT. Fig. 2 (V. 2151) we have portions of pinne showing 
all the characteristics of Onychiopsis Mantelli. At a the lower 
part of a pinna is preserved with the axis prolonged, and bearing 
alternately disposed narrow ovate appendages; these appendages 
must be regarded as fertile segments of the pinna. There is a 
gradual transition seen from the sterile to the fertile part in the 
right-hand fragment shown in Fig. 2a. In the same Figure, at 4, 
the terminal portion of a fertile pinna is more perfectly preserved, 
and here the distal end of the axis has the characteristic serrate 
form of the tip of an ordinary sterile frond. 
In Pl. Ill. Fig. 4 (V. 1069) three fertile axes are shown ; these, 
if taken alone, would doubtless be referred to a position far 
removed from Onychiopsis Mantelli, but if we compare them with 
the terminal portions of the pinne of Fig. 2 (V. 2151), there can 
be no doubt as to their real nature. At the tip of the right-hand 
axis the serrate character is readily seen, as previously noticed in 
Pl. III. Fig. 24, but this is rather too small to be distinct in the 
figure. The specimen (V. 1069) shown in Fig. 4 affords strong 
proof of the intimate relationship between O. Mantelli and 
O. elongata (Geyl.), as figured by Geyler.! 
The details of the fertile segments are best seen in P]. IIT. Fig. 2 
(V. 2159); three of the segments are enlarged 33 times in the 
Woodcut, Fig. 4 (p. 50). 
In the Woodcut, Fig. 5, four segments of another specimen are 
also enlarged 34 times; these are somewhat shorter and show a 
much more distinct median line. Compare with these figures 
Yokoyama’s figure of O. elongata;* there is a close agreement, as 
regards the fertile segments. Cf. also Velenovsky’s figure of 
Onychiopsis (Thyrsopteris of Velenovsky) capsulifera, Vel.° 
1 Paleontographica, vol. xxiv. pl. xxxi. fig. 5. 
2 Yokoyama, Joc. cit. pl. ii. fig. 44. 
3 Velenovsky, doc. cit, pl. i. fig. 10. 
