id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
44569	Boyer, Charles S. (Charles Sumner)	The Diatomaceæ of Philadelphia and Vicinity			.txt	text/plain	57325	8229	77	Valve lanceolate; costæ slightly radiate, punctate; median area broad, axial area and slightly radiate, punctate striæ; the upper valve with a slightly radiating, finely punctate striæ; lower valve with narrow, axial _Var. libyca (Ehr.) Cl._--Central area distinct on the dorsal side. _Var. pediculus (Kuetz.) Cl._--Central area and nodule quite distinct. Frustules stipitate; valve lanceolate; striæ transverse in the middle, Valve lanceolate, axial area narrow, central area widened; transverse striæ Valve linear, with parallel margins and rounded ends; axial area narrow, Kuetzing's species is Pinnularia esox Ehr., a form near P. _Var. gracilis (Ehr.) Cl._--Valve lanceolate, striæ very fine; margin of _Var. amphicephala (Kuetz.) Cl._--Valve capitate at the ends; striæ, 24 in Valve elliptical-lanceolate, with rounded ends; striæ and puncta closer Valve lanceolate, obtuse; axial area widened in the middle; striæ radiate near the ends of the valve, forming a transverse lunate space; central area Valve lanceolate; axial area narrow; central area small, rounded; striæ	./cache/44569.txt	./txt/44569.txt