LEBESCONTIA OCCULTA. 



SOS 



Orthis Berthoisi, EouauU. 



— mund£e, Sharpe. 



— noctilio, Sharpe. 



— Ribeiroi, Sharpe. 



Encrinites Andegavensis, Trom. and 



Leb. 

 Petraia ? insolita, Trom. and Leb. 



In M. Lebesconte's CoUectiou the following, besides the Ditbyrocarid, were 

 observed from Renaze : — genal and pleural spines of Trilobites, Eurypterid 

 fragments, Criuoid stems (Triacrinus), part of an arm of an Asteriad (Loriolaster ?), 

 Pteropodal (?) shells, also remains of Brachiopods and of Molluscan bivalves. 



Note. — It is possible that Fig. 12 a does not represent a truly bivalved test, 

 but that the two moieties of a flat carapace have been squeezed horizontally into 

 a narrow boat-shape. 



II. Lebrscontia occulta, sp. nov. Woodcntp, Figs. 14, 15, and 16. 



Fig. 15. Kr^eSB^HMK". Fia. 14. «. 



■■> . 



Fio. 16 A. 



i 



r 



■J 



> . :»,«»H.g.>7.::,y 



FiG. 16 b. 



Fia. 14. — Lehescoutiu uccJia, sp. uov. Right moiety of carapace, magnified 1^ diaui. 



Fig. lo.—Lebescontia occulta, sp. nov. Counterpart, showing the impression of the right valve, Fig. 14; probably the 

 loss of the outermost film has e.\posed the strife more distinctly ; magnified 1 j diam. 



Figs. 16 a, b.— Part of the structure of the dorsal margin, wliere the arrow points in Fig. 14; magnified 10 diam. 



Since describing M. P. Lebesconte's Breton specimens. Figs. 11, 12,13, at 

 page 199, we have met with, among some Carboniferous fossils lent to us by Mr. 



