604 NEW YORK STATE MUSEUM 



of the United States national museum proceedings, pi. 10, fig. 6. 

 This specimen, to which the above specific designation was 

 applied in manuscript by the writer several years ago, is one 

 of a suite from the Catskill beds at Factoryville Pa., now in 

 the Lacoe collection. As will be seen by consulting the figure 

 cited, the species is characterized by the wavy or ruffled lateral 

 wing of the clearly membranaceous lamina, and the distinct 

 costa, rounded in contrast but showing no signs of vascular 

 structure. In form and aspect it is most nearly comparable 

 to the living Dictyopteris delicatula Lam., though 

 its lamina is wavy or ruffled at the borders in addition. 



To the genus Taeniocrada would appear to belong also the 

 specimens from the Devonic illustrated by Potoni^ 1 and the 

 Sandbergers, 2 as perhaps may the Haliserites distans 

 of Eichwald, 3 from the Carbonic of Russia, the H. lusaticus 

 of Geinitz, 4 from the Permic of Saxony, and possibly the H . 

 1 i n e a t u s and H. chondriformis of Penhallow 5 from 

 the upper Chemung beds at Lanesboro, Susquehanna co., Pa. 

 Whether the specimens illustrated by Goppert as Hali- 

 serites dechenianus are congeneric with Taeniocrada, 

 remains for the present a matter of doubt. 



Of the plants from the Mesozoic described as Haliserites 

 the H. contortuplicatus von der Marck 6 and H . 

 gracilis Deb. & Ett., 7 from the Senonian, are characterized 

 as membranaceous and appear to owe their reference to this 

 genus to their resemblance to the living Haliseris. 8 It is 



1 Lehrbuch d. Pflanzenpaleont. 1899. p. 60, fig, 26. 



2 Verst. d. Rhein. Schichtensyst, Nassau. 1856. p. 424, pi. 38, fig. 1. 



3 Lethaea rossica. 1860. 1: 49, pi. 1, fig. 2. 



4 Dyas. 1862. pt 2, p. 133, 336. 



5 U. S. nat. urns. Proc. 1893. 16: 110, pi. 11, fig. 8b and 9. 



6 Palaeontographiea. 1863. 11 : 81, pi. 13, fig. 13. 



7 Debey & Ettingshausen. Urweltliche Thallophyten. 1859. p. 61, pi. 1, 

 fig. 1, 2. 



8 Other Mesozoic species described as Haliserites are: H. schlotheimi 

 Debey (Entwurf. e. geogn. geogen. Darstell. d. Gegend v. Aachen. 1849. 

 p. 31) and H. trifidus Debey (Verh. Naturh. Ver. pr. Rheinl. u. West- 

 phal. Jahrg. 5. 1848. p. 114) from the Senonian; H. tunguscanus 

 Schmalhausen (Mem. Acad. imp. Sci. St Peter sb. Ser. 7. 27: 59) from the 

 Oolite; and H.? elongatus Fr. Braun (Munster's Beitrage. 1843. v. 6, 

 no. 26, p. 26) from the older Mesozoic. 



