M.E. Blochii, doctoris medicinae Berolinensis ... Systema ichthyologiae iconibus CX illustratum /.Berolini :Sumtibus auctoris impressum et Bibliopolio Sanderiano commissum,1801..biodiversitylibrary.org/page/38785800The very cool bowmouth guitarfish has a band of massive, sharp thorns running along the midline of its back biodiversitylibrary.org/page/38785800 #bhlib
The Tiger Stingray or Raya Tigre is native to some rivers in the western Amazon basin. It is a colorful favorite with aquariums, in this case in Vancouver. Often denoted as P. menchacai, a troubled taxon. In context at www.dixpix.ca/Amazon/fauna/riverlife/index.html