Characteristic scales of subclusters in the Virgo area

In this paper, we present a "peak number count method", based on wavelet tr ansformation, and use it to explore the structure and substructures in the Virgo area. It is found that, besides the two-humped structure, there are a lso quite a lot of small subclusters with characteristic scales of 180' and 120'. This result strongly supports the hierarchical clustering model of s tructures. The wavelet coefficient map clearly shows these substructures an d their distributions. Additionally, two new small subclusters are discover ed.