Placebranchus gracilis, no. 469 : Placebranchus variegatus, no. 470 : Pterogasteron marginata, no. 475 : Pterogasteron nigropunctata, no. 476 : Pterogasteron rufescens, no. 477

Placebranchus gracilis, no. 469 : Placebranchus variegatus, no. 470 : Pterogasteron marginata, no. 475 : Pterogasteron nigropunctata, no. 476 : Pterogasteron rufescens, no. 477, 123007, Box: 8, Folder: 81. Leopold and Rudolf Blaschka Collection, MS-0013. The Rakow Research Library Manuscript Collection. https://archivesspace.cmog.org/repositories/3/archival_objects/3136 Accessed March 23, 2023.