  Galaxies with 'rows' in Vorontsov-Velyaminov's terminology stand out among
the variety of spiral galactic patterns. A characteristic feature of such
objects is the sequence of straight-line segments that forms the spiral arm. In
2001 A. Chernin and co-authors published a catalog of such galaxies which
includes 204 objects from the Palomar Atlas. In this paper, we supplement the
catalog with 276 objects based on an analysis of all the galaxies from the New
General Catalogue and Index Catalogue. The total number of NGC and IC galaxies
with rows is 406, including the objects of Chernin et al. (2001). The use of
more recent galaxy images allowed us to detect more 'rows' on average, compared
with the catalog of Chernin et al. When comparing the principal galaxy
properties we found no significant differences between galaxies with rows and
all S-type NGC/IC galaxies.We discuss twomechanisms for the formation of
polygonal structures based on numerical gas-dynamic and collisionless N-body
calculations, which demonstrate that a spiral pattern with rows is a transient
stage in the evolution of galaxies and a system with a powerful spiral
structure can pass through this stage. The hypothesis of A. Chernin et al.
(2001) that the occurrence frequency of interacting galaxies is twice higher
among galaxies with rows is not confirmed for the combined set of 480 galaxies.
The presence of a central stellar bar appears to be a favorable factor for the
formation of a system of 'rows'.
