Howes, G.B. (1890)
Observations on the pectoral fin-skeleton of the living batoid fishes, and of the extinct genus Squaloraja, with especial reference to the affinities of the same. Proceedings of the Zoological Society of London, 1890, 675–688
Howes, G.B. (1890)
On the visceral anatomy of the Australian Torpedo (Hypnos subnigrum), with especial reference to the Suspension of the Vertebrate Alimentary Canal. Proceedings of the Zoological Society of London, 1890, 669–675