1885 with some notes on the anatomy and generic characters of scorpions; 74 p., 12 lithographed plates (mostly coloured or tinted), 4to, disbound (no covers). Important paper on the anatomy of the scorpions and horseshoe crabs. With excellent, detailed illustrations. The part on Scorpiones is by Miss Beck and contains seven plates. Published in the Zoological Society's Transactions. Inner margin of first text leaf a bit creased, otherwise a very good clean copy. Scarce.