ONYCHIOPSIS. 53 
V. 2188. A much branched and spreading rhizome, with its 
surface covered with small depressions representing the points of 
attachment of scales; in some places there is a carbonaceous 
covering preserved. As usual with specimens of this kind there 
are associated fragments of O. Mantelli pinne. This form of 
rhizome resembles that which is characteristic of some recent 
Davallias, and is more spreading than the usual form met with in 
species of Onychium. Such differences, however, in the nature of 
the stems need not be looked upon as an argument of very great 
weight in questions of generic affinity, when Mesozoic and Recent 
ferns are compared. Ecclesbourne. _ Purchased 1839. 
V. 2231. Rhizome fragments with scaly surface markings, and 
on the same specimen portions of fronds. Cf. Woodcut, Fig. 6, 
p- 52, V. 2189. Ecclesbourne. Rufford Coll. 
V. 2235. Part of a spreading rhizome with less clearly preserved 
leaf fragments. Ecclesbourne. Rufford Coll. 
V. 22410. Several well-preserved sterile pinne and portions of 
sterile fronds on a large slab. Ecclesbourne. Rufford Coll. 
V. 2314. Fragments of circinately rolled fern fronds, one much 
more perfect than the others. There are also several pieces of 
rhizome-like structures, some showing the characteristic scaly 
appendages. On the same slab of sandstone occur fragments of 
what may be O. Mantelli, but they are very indistinct and 
doubtful. I have included this specimen under the head of 
O. Manteili, although there is no absolute proof that the various 
fragments really belong to that fern. Cf. Schenk, Palaontographica, 
vol. xix. pl. xxx. figs. 4 and 5, also vol. xxii. pl. xxvi. fig. 2. 
V. 23140. Probably a rhizome with the basal portions of petioles 
attached ; shows the rough scaly surface. Ecclesbourne. 
Rufford Coli. 
V. 2348. Rachis clearly preserved, 12°5 cm. long. Somewhat 
less compact in habit than most examples of the species. ccles- 
bourne. Rufford Coll. 
V. 2369. Rhizome fragments with leaf-stalks attached; also 
pieces of pinne. Ecclesbourne. Rufford Coll. 
