Gérard de Vaucouleurs developed an extension of the Hubble classification of galaxy types involving a "three-dimensional" classification grid extending from ellipticals at one end to irregulars at the other. For those and lenticular galaxies, de Vaucouleurs' classifications are somewhat similar to Hubble's classifications, but for spiral galaxies distinctions are made between normal and ringed, barred and unbarred, and transitional types, and even the simpler structures have various subclassifications, leading to a more detailed "shorthand" description. Various methods are commonly used to illustrate the system. One is a drawing of the three-dimensional grid, showing artistic impressions of the appearance of various galaxies (an example of such a grid will be posted here if I can find one that is in the public domain). Another method is the publication of a catalog showing several hundred photographs of actual galaxies as examples of specific types (current editions include examples used by de Vaucouleurs, and numerous supplementary examples). When complete this page will include thumbnail images of every galaxy in the online de Vaucoulers Atlas (with a link to the appropriate page in that Atlas), and the NGC/IC/PGC designation of each galaxy linked to its entry on my website. A quick perusal of the images below shows that this page is in its early stages, but I intend to work at it on a regular basis and it should be complete by the end of the summer (the linked pages on my site may take a little longer, but are also a top priority).
Note: The obvious order for the table/images below would be according to the galaxy classification; but some galaxies defy classification, and for that and presumably other reasons the order of the plates in de Vaucouleurs' Atlas is not strictly in order of the classification. But rather than second-guess him and those who have updated and added to his original work I have left the images in the order presented on the external site.