. Bulletin - United States National Museum. nnsylvania and in the Albany, Schoharie County area ofeast-central New York this species is known only from cave central New York records are from wells and springs occurring inlower Paleozoic sandstones and limestones (but mostly Devoniansandstones). Marginal populations in eastern Pennsylvania areknown mostly from seeps and springs developed in lower Paleozoicsandstones and limestones. In caves, S. allegheniensis is usuallyfound under rocks in small streams or in shallow pools with siltbottoms. In John Friends Cave this species has been c
. Bulletin - United States National Museum. nnsylvania and in the Albany, Schoharie County area ofeast-central New York this species is known only from cave central New York records are from wells and springs occurring inlower Paleozoic sandstones and limestones (but mostly Devoniansandstones). Marginal populations in eastern Pennsylvania areknown mostly from seeps and springs developed in lower Paleozoicsandstones and limestones. In caves, S. allegheniensis is usuallyfound under rocks in small streams or in shallow pools with siltbottoms. In John Friends Cave this species has been collected on two 70 NATIONAL MUSEUM BULLETIN 259 different occasions associated with S. emarginatus, the latter species,however, being much less abundant. Collections haA^e been made during all months of the year except inSeptember, October, and January, but ovigerous females were presentonly in collections made between March and August. Samples con-tained 25 ovigerous females that ranged in size from mm to CD UJ < 3 St Antenna. 4 12 13 14 5 6 7 8 9 10 11 STANDARD LENGTH, MM Figure 16.—Relation of antennal length to standard length (body length excluding appen-dages) in Stygonedes allegkeniensis from seeps, springs, and wells in Herkimer andOnondaga Counties, [Antenna 1 (solid circles), antenna 2 (xs). Regression linecalculated by the least squares method.] SUBTERRANEAN AMPHIPOD STYGONECTES 71 mm (Mean = , = ). Egg production is simimarizedas follows: N = 25, Eange=3-10 eggs, Mean = , = , = Remarks.—The collections from Johnson (Upper) Cave, CentreCo., and Barton and Dulany Caves, Fayette Co., referred to S. pizziniiby Shoemaker (1938, 1942a); and the records for S. pizzinii fromBarton and Dulany Caves and Veiled Lady Cave, Centre Co., givenby Dearolf (1941) undoubtedly belong to the species described Pennsylvania localities for Synpleonia hayi ( Veiled LadyCave) and Synpleonia species ( Barton a
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