MESOZOTC PLANTS FROM KOREA- 23 



1890. Onychiopsis elongata Yokoyama : Jurassic Plants from 

 Kaga, Hick and Ecliizen. P. 27, pi. II., figs. 1-3 ; 

 pi. III., fig. 6d; pi. XII., figs. 9. 10. 

 1890. Oiiychiojms elongata Nathorst : Beiträge z. Mesozo- 

 ische Flora Japans. P. 4, pi. I., figs. 1-3, pp. 8, 

 10, 13, 14, pi. VI., fig. 5. 

 1894. Onychiopsis elongata Yokoyama : Mesoz, Plants from 

 Kozuke, Kii and Tosa. P. 215, pi. XX., fig. 8 ; 

 pi. XXI., figs. 1 and 4. 

 ? 1884. Onychiopsis elongata Seward : Wealden Flora I. 



P. bb, pi. II., fig. 2. 

 ?1896. Onychiopsis elongata Krasser: Beitr. z. Kenntniss 

 d. Foss. Kreideflora v. Kunstadt. P. 121, pi. VII, 

 fig. 1. 

 This elegant fern is exceedingly common in the plant bearing 

 beds of Naktong, althongh it is not easy to obtain specimens 

 sufi[iciently large and well preserved to show the entire frond. 

 Not seldom, large blocks of shales are found containing innumer- 

 able fragments of pinnae frequently bearing fructification. On 

 pi. I. and II., some of the specimens are figured ; all of them 

 show the characteristic features of the species, quite agreeing with 

 the description and figures of the Japanese specimens in Prof. 

 Yokoyama 's works. 



Prior to Yokoyama's publication, IMr. S. Matsushima, in 

 his " Geological Eeport of the Eastern Part of Echizen including 

 the Upper Tetorigawa Begion " 1883 (MS.), described a fern 

 under the name of Sphenoptevis 31antelli, much like Thyrosoptevis 

 elongata Gey'ler but more slender in appearance. This specimen 

 is reproduced here in pi. I., fig. 12, from which we know that 

 it is almost indistinguishable from the drawings of European 



