Diagrams, frequency curves and observations by Walter Frank Raphael Weldon Three diagrams, labelled figures 2-4, showing two curves of frequency of all observed magnitudes of post-spinous lengths and total carapace lengths and a line graph plotting the relation between the deviation of carapace lengths and post-spinous lengths. Includes notes to the engraver. Subject: Zoology / Carcinology Prints of these diagrams were published in volume 51 of the Proceedings of the Royal Society alongside the paper 'Certain correlated variations in crangon vulgaris'. 1892