This carriage database discusses the history of the carriage and its uses over time. Included are links to specific makes of carriages, which lead to more detailed information or definition about that type, ie. landau, barouche, mail coach, phaeton, etc. In some instances, images accompany the pages. (Click on reference, then carriage). Update: Something seems to be wrong with the first link to the carriage database. I shall update this post as soon as I find the link again. This link to A Catalogue of Horse drawn vehicles 1896 catalogue of E. S. Annison, Coach Builder, of Hull, features drawings of his carriages and their latest design (late 19th century). Internet Archive provides a downloadable PDF book with images, Carriages and Coaches: their history and their evolution, fully illustrated with reproductions from old prints, contemporary drawings and photographs (1912). This entry in Carriages in Indopediais contemporary and provides links to definitions and information.
The Georgian Index features an excellent page on Carriages and their Parts. Highways and Horses, Athol Maudslay, 1888 is an illustrated Google book that discusses carriages and transportation during the Victorian period in great detail. On the fronticepiece, Mr. Maudslay writes :