John Herschel discovered NGC 3749 = h3351 on 21 Apr 1835 and logged "pB; lE; glbM; 40"." His mean position from 2 consecutive sweeps matches ESO 320-008.

400/500mm - 18" (4/25/09): faint, moderately large, elongated. At times only the brighter 30" core was visible but with concentration, long low surface brightness arms extend WNW-ESE and increase the size to ~1.4'x0.5'. The eastern side of the galaxy nearly reaches a line connecting two mag 12/13 stars with a separation of 3'. Located 4.8' SE of NGC 3742 and on images appears to be tidally disrupted.

Notes by Steve Gottlieb