250 BESOKIPTITB CATALOGUE 



1838. Chondrites Targionii et varr., Sternberg, Vei'such Flora 



Vorwelt, p. 25, pi. ix, fig. 3. 

 1853. Chondrites Targionii, Unger, Denkschr. k. Akad. Wiss. 



Wien, vol. 4, p. 79, pi. xxv, fig. 6. 

 1858. Chondrites Twgiimii (excl. some of Sternberg's van-.), 



Fisclier-Ooster, Fossilen Fucoiden, p. 46, pi. viii, figs. 8 n, 8 i. 

 1863. Cliondrites Vindobonensis, varr., Ettingshausen, Fossilen 



Algen Wiener Karpathen-Sandsteines, p. 457. 

 1869. Chondrites Targionii, Schimper, Traits PaWont. V^gSt., 



vol. 1, p. 170, pi. iii, fig. 7. 

 1877. Chondrites Targionii (et varr.), Heer, Flora Foss. HelvetJEe, 



p. 155 ; pi. Ix, fig. 5 ; pi. Ixi, fig. 9 ; pi. Ixii, figs. 1-10; pi. Ixiii, 



figs. 6 a, 12-17. 

 1880. Chondrites Targionii, Hosius & v. d. Marok, Palseontogr., 



vol. 26, p. 130, pi. xxiv, figs. 1, 2. 

 1896. Phycopsis Targioni, Rothpletz, Zeitschr. deutsoli. geol. Ges., 



vol. 48, p. 887. 

 1900. Chondrites Targioni, Zeiller, ifeldm. Palseobot., p. S3, fig. 6. 



Heer's diagnosis is perhaps the most concise : — " Chondrites 

 fronde irregulariter dichotome et pinnatim ramosa, ramis 

 alternis et oppositis, hinc inde valde approximatis 'TS-l-S mm. 

 latis,longitudine valde inaequalibus,ramulis nonnuUis praelongis, 

 angulo aeuto egredientibus, errectis, strictis." 



HoBizoN. — Lower Greensand — Fl3-sch. 



LooALiTT. — "Widely distributed over Europe. 



Many of the specimens which have been referred to this 

 species are certainly worthless, and are probably worm-burrows 

 or animal-tracks of the kind demonstrated by Nathorst. 

 Further, a number of specimens have been placed in sub- 

 species or varieties which show no real features distinctive 

 enough to separate them from the " species " which is recog- 

 iiisedly of little scientific value in any case. There are, 

 nevertheless, a number of fossils which can at once be recognised 

 as characteristic and which it is useful to place together under 

 one well-established name. 



The specimens in the Museum are principally from the 

 Lower Greensand of Bignor Park, one of the earliest known 

 localities for the fossil, wliich Mantell described and figured in 

 several of his works. The thallus is whitish and highly 

 calcareous, and the specimens are less suggestive of plants than 

 many of the others included in the species, though they come 

 within the terms of the diagnosis. 



