European stocks slipped on Monday morning, resuming their sell-off of the past 10 days, hurt by brewing worries over emerging markets and data showing China's economy losing momentum, Reuters reported. Shares in low-cost airline Ryanair bucked the trend, up 4.8 percent after the company said intense price competition in Europe was easing and forward bookings were up. Investors overlooked an upbeat German manufacturing survey - showing the sector's fastest growth in more than two years in January - and fretted instead about figures showing a slowdown in Chinese manufacturing. That raised concerns about the potential impact on the global economy and on turbulent emerging markets. At 0923 GMT, the FTSEurofirst 300 index of top European shares was down 0.5 percent at 1,285.83 points. The benchmark index has lost 5.1 percent since a high hit on Jan. 21. The euro zone's blue-chip Euro STOXX 50 index was down 0.6 percent at 2,994.11 points.