Maryland Geological Sukvey 413 



The Cedrus lotharingica which Cornuel (Bull. Soc. Geol. Fr. (iii), t. 

 X, 1882, p. 263, pi. vii, figs. 2, 3) describes from the lower Gault of 

 Houpette (Meuse), Prance, is strikingly similar to the Potomac form. 

 This species was afterward united by Pliche loc. cit. with the larger 

 but otherwise similar cones which are widespread in the Albian of Prance 

 and England under the name of Cedrus ohlonga (L. and H.). 



Occurrence. — Arundel Pormation. Union Tunnel, near Aisquith 

 St., 35 feet below the surface, Baltimore, Maryland. 



Collection. — Johns Hopkins University. 



Genus CUPRESSINOXYLON i Goepperl 

 [Mon. Foss. Conif., 1850, p. 196] 



This rather comprehensive genus is defined as follows by its original 

 describer : 



" Truncorum structura fere Cupressinearum viventium. Trunci ipsi 

 e cortice, ligno et medulla magis minusve centrali formati. Corticis 

 pars fibrosa cellulis quadrangulis peiiphericis, lignum e stratis concen- 

 tricis angustis distinetis, strati zona exteriore plerumque ang-asta e 

 cellulis pachytichis compressa, interiore multo latiore e vasis leptotichis 

 formata, medulla e ipsa cellulis pauoioribus pachytichis composita. 

 Cellulge ligni prosenchymatosas, porosse ductibus resiniferis simplicibus 

 interjectis. Pori rotundi in simplici, in truncis annosioribus quoque 

 duplici interdum tri vel quadruplici serie in eodem piano horizontali 

 justapositi, in iis plerumque tantum cellularum parietibus, qui sibi oppo- 

 siti et radiorum medullarium paralleli sunt vel in parietibus radiis 

 medullaribus obversis interdum nonnulli vel etiam plurimi tamen rainores 

 in omnibus inveniuntur. Eadii niedullares similares minores siinplici 

 cellularum parenchymatosarum porosarum serie. Parietes earum supe- 

 riores et inferiores poris minutis, laterales majoribus instructi. Ductus 

 resiniferi plerumque simplices cellulis elongatis subquadrangulis super- 

 positis formati inter ligni cellulas imprimus angustiores inveniuntur." 



^ This generic name is spelled in various ways, the present usage being that 

 of Goeppert which not only has priority hut is etymologically correct, the 

 root being derived from the subfamily name Cupressinese. 



