RAM 27109, anterior plastral lobe of Boremys pulchra Lambe, 1906a. A. Reconstructed B. pulchra carapace of Brinkman and Nicholls (1991), with shaded area representing RAM 27109; B. Photograph in ventral view; C. Line drawing in ventral view; D. Photograph in dorsal view; E. Line drawing in dorsal view; F. Proximal (broken) cross section of anterior plastral lobe. Light grey lines represent sulci and dashed lines in C and E show missing edges. In F, dotted lines indicate boundaries between interior bone layers. 5 mm scale applies to F only.