252 DEScniPxiTE catalogue 



10780, 9424, 9426, V. 11507, V. 11508, V. 11509, V. 11510, 

 V. 11511, V. 11512. Similar specimens from the 

 Greensand ; Bignor (?). Mantell Coll. (?) 



CCi)onftriU^ fntvtcatu^ (Brongniart), Sternberg. 

 [Plate I, fig. 1 6.] 



1824. Fueoides intricatzts, Brongniart, Observations sm.' Fucoides, 



p. 311, pi. xix, fig. 8. 

 1828. Fucoides intricahis, Brongniart, HisL. V^get. Foss., p. 59, 



pi. V, figs. 6, 7, & 8. 

 1828. Fucoides intricatus, Brongniart, Prodrome, p. 20. 

 1838. C/i07irlrites intricatus, Sternberg, Versucli Flora Vorwelt, 



p. 26, pi. vii (nou vi), fig. 3. 

 18-58. Chondrites intricatus, Fischer-Ooster, Fossilen Fucoiden, 



p. 44, pi. viii, fig. 1. 

 1863. Chondrites Vindubonensis, van-., Ettingshausen, Fossileu 



Algen Wiener Karpathen-Sandsteines, p. 457. 

 1869. Chondrides intricatus, Sohimper, Trait6 PalSont. V^g(5t., 



vol. 1, p. 172, pi. iii, fig. 9. 

 1877. Chondrites intricatus (et varr.), Heer, Flora Foss. Helvetife, 



p. 157, pi. Ixiii, figs. 1-10. 

 1896. Phyeopsis intricata, Rothpletz, Zeitsclir. deutsch. geol. Ges., 



vol. 48, p. 888, pi. xxii, fig. 7. (Chondrites esqualis should 



prohably he included here.) 



Heer's diagnosis may be quoted : — " Chondrites fronde subtili, 

 caespitosa, tripinnatim ramosa, ramulis •25-"5 mm. latis, longi- 

 tudine inaequalibus, setaceis, angulo aouto egredientibus, 

 approximatis." 



Horizon. — Cretaceous — Flysch. 



Locality. — Widely distributed in the Swiss Alps and else- 

 where. 



Ettingshausen (1863) concluded that this species is really a 

 younger form of Chondrites Targionii, but Eothpletz's more 

 recent and more detailed work does not support this view. 

 The species was one of the earliest to be recognised among 

 fossil algse, and its characteristic size and appearance make it 

 easily distinguished from most of the other " species " of 

 supposed algse. 



In our PL I, fig. 1 a slab of Cretaceous Flyach shale is 

 illustrated, showing numerous fragments (6) of the plant with 

 other algae. 



