Fourteen oribatid mite fossils have been recovered from a terrestrial Devonian deposit near Gilboa, New York; they allow an approximate doubling of the known age of the group. Two species are represented by specimens complete enough to allow descriptions. Protochthonius gilboa n. gen. and sp. is the earliest derivative known member of the Enarthronota, and comprises the monobasic new family Protochthoniidae. Devonacarus sellnicki n. gen. and sp. also represents a monobasic new family, Devonacaridae; it may also be an early derivative enarthronote mite, but its relationships are uncertain. Two other species are represented at the site, but meaningful descriptions are not possible with available material.

A new fossil site near Gilboa, New York, is one of only three where fossils of terrestrial arthropods of Devonian age have been found. The new Gilboan fauna is younger than the other two but richer in taxa. Fragmentary remains and nearly whole specimens assigned to Eurypterida, Arachnida (Trigonotarbida, Araneae, Amblypygi, and Acari), Chilopoda [Craterostigmatomorpha(?) and Scuterigeromorpha(?)], and tentatively to Insecta (Archaeognatha) have been found. The centipedes and possible insects may represent the earliest records known for these groups.

~ Z P u Yosk 14853, U.S..I. f h r p n n i $~y r i c~ colnphy1lu.i Grirrson & Banks is transferred to flizskinsia Grierson & Banks on the Ixisis of the rnorpliology of its leaves and its anatomical structure. Slender, dichotomizing axes b a r helically arfiiiigrd I c~v r s that iirr falcatr, petiolate, simple, Ianceolate and entire. A solid cylinder of metaxylein is surrountlrd lq ridges of protoxylern. Pitting on tracheid w;ills is annular, helical, reticulate, sc;il;trifi)nn t o circiil;ir-l)ortlrred. 'l'his lycopod extends from early Givetian into early Frasnian time in the Catskill strata of rastrrn N r w York State. The d e r t of clravage of fossiliferous rock on patterns ohsened 011 ttir rxposed fossils mid the Ixiring of Ipcrnt rrsrarch on the Lbssil histor) of lycopods ;irr disc iissrd. m24 4074/8:3/010081 +21$03.00/0 (') 1983 The Linnean Society of Londona4

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