ONYCHIOPSIS. 63 



v. 2188. A mucli branched and spreading rhizome, mtli 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 0. MantelU pinnae. 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 Eecent 

 ferns are compared. Ecclesbourne. Purchased 1839. 



V. 2231. Ehizome 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. 2241a. Several well-preserved sterile pinuEe 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 0. MantelU, but they are very indistinct and 

 doubtful. I have included this specimen under the head of 

 0. MantelU, although there is no absolute proof that the various 

 fragments really belong to that fern. Cf. Schenk, Palaeontographica, 

 vol. six. pi. XXX. figs. 4 and 6, also vol. xxiii. pi. xxvi. fig. 2. 



V. 2314a. Probably a rhizome with the basal portions of petioles 

 attached ; shows the rough scaly surface. Ecclesbourne. 



Rufford Coll. 



V. 2348. Eachis clearly preserved, 12'5 cm. long. Somewhat 

 less compact in habit than most examples of the species. Eccles- 

 bourne. Rufford Coll. 



V. 2369. Ehizome fragments with leaf-stalks attached ; also 

 pieces of pinnae. Ecclesbourne. Rufford Coll. 



