sentences:  This work was intended to be an English language counterpart to the German language zoological index "Archiv für Naturgeschichte", but without the "Archiv's" publication delays.After the first six volumes were published, Van Voorst withdrew as publisher due to a lack of profits from the work.Concerned zoologists then formed the Zoological Association and published volumes 7–22 (1870–1885) as the "Zoological Record".