[On the study of West Palaearctic species of the genera Psammitis Menge 1875, Xysticus C.L. Koch 1835 and Ozyptila Simon 1864 (Arachnida: Araneae: Thomisidae).] Beitraege zur Araneologie, 4 1994: 749-774. 754 [Zoological Record Volume 133]