References
- Ann. & Mag. Nat. Hist. ser. 4 , xx 220 – 220 .
- Ann. & Mag. Nat. Hist. ser. 4 , xx 223 – 223 . pl. vi. figs. 12–14
- Journ. Anat. & Phys. , i 334 – 334 . pl. xiv. fig. 5; and also Hincks, Brit. Hydr. p. 98
- Journ. Anat. & Phys. , i 334 – 334 . fig. 6
- Ann. & Mag. Nat. Hist. ser. 4 , xx 227 – 227 .