106 CONIOPTEEIS. 



reference may be made to a figure of Asplenium multilineatum, Hk. r 

 given by Eeinecke in a recent volume of Engler's Jahrbiicher. 1 



An English specimen in the Lund Geological Museum, labelled 

 by Nathorst Sphenopteris scarbroensis, bears a very close resemblance 

 to Coniopteris Jiymenophylloides, and may be identical with that 

 species. C. hymenophylloides is represented by numerous specimens 

 in all collections of Yorkshire Jurassic plants. 



52,568. PI. XYI. Figs. 4 and 5. 



Several pieces of pinnae with deeply dissected pinnules, varying 

 in size from the small and narrow form shown in Fig. 4 to the 

 broader deltoid shape of Fig. 5. The venation is very clearly 

 shown in some of the pinnules. These fragments appear to me 

 identical with Brongniart's Sphenopteris hymenophylloides, the only 

 difference being that in the fragment of the lower part of the pinna 

 of Fig. 5 the segments are rather broader than in Brongniart's 

 specimen. The pinna, of which a part only is drawn in Fig. 5,. 

 is 8 cm. in length, the uppermost pinnules being of the form 

 illustrated in Fig. 4. The type-specimen of Sphenopteris arguta, 

 L. & H., agrees exactly with the examples represented in 

 Figs. 4 and 5 ; similarly, I regard the smaller pinnae of the frond 

 shown in Fig. 1, PL XX. as identical with the present specimen. 

 This leads to a comparison with Heer's species Thyrsopteris 

 Maakiana, from the Jurassic beds of Siberia, 2 a type which 

 I believe to be identical with such English specimens as 52,568 

 (PL XVI. Figs. 4 and 5), the Whitby frond shown in PL XX, 

 Fig. 1, 40,467 (PL XVII. Fig. 3), and others. 



Scarborough. Bowerlank Coll. 



V. 3672. PL XVI. Fig. 6. 



The chief difference between this pinna and those of specimen 

 52,568 (PL XVI. Figs. 4 and 5) is in the more rounded form of 

 the lobes of the segments, as shown in Fig. 6, PL XVI. This type 

 of pinna is identical with those in some of the specimens referred 

 by Brongniart to Coniopteris Murrayana, especially as drawn in 

 his pi. cxxvi. fig. 3. 3 The example figured in Phillips' third 



1 Reinecke (97), pi. iv. 



2 Heer (77), ii. pi. ii. fig. 6. 



3 Brongniart (28 2 ). 



