Fig. 2. Mechanical testing apparatus. (A) Isolated mesoglea preparation. A slab of mesoglea was laid on the moving stage of an Instron testing machine. Cyanoacrylate adhesive was applied to both plates. Orientation labels: A, anterior; P, posterior; M, medial; L, lateral; C, circumferential. (B) Intact animal preparation. Glue was applied to the bottom of the upper plate and the top of the lower plate. (Inset) Section looking along the long axis of the jellyfish in the mount. Plates were aligned over the ad-radius (as shown) or per-radius.