FIGURE 2 in Description of two new species of Arcania Leach, 1817, from the western Pacific Ocean and redescriptions of A. undecimspinosa De Haan, 1841, and A. elongata Yokoya, 1933 (Crustacea: Brachyura: Leucosiidae)

FIGURE 2. Arcania undecimspinosa De Haan, 1841. NSMT-Cr 4397, male, ca. 25.9 × 25.1 mm (front damaged), Kochi, Japan; a, habitus; b, cephalothorax, frontal view.