** Shares of SciDev SDV.AX rise as much as 4% to A$0.26,
their highest since Jan 12
** Shares extend gains to a fourth consecutive session
** The environmental solutions firm posts quarterly revenue
of A$28.5 mln ($18.77 mln), up 19% from a year-ago period
** About 121,351 shares change hands, compared with the
30-day average volume of 155,038 shares
** Stock down 3.9% this year, as of last close
($1 = 1.5181 Australian dollars)
(Reporting by Sherin Sunny in Bengaluru)
((Sherin.Sunny@thomsonreuters.com))