Fig. 131. Ariolimax californicus contracted in spirits.
Source: Bulletin of the Museum of Comparative Zoology at Harvard College, 1878
Source book page: https://archive.org/stream/bulletinofmuseum04harv/#page/n246/mode/1up
Source: https://commons.wikimedia.org/wiki/File%3ABulletin_of_the_Museum_of_Comparative_Zoology_at_Harvard_College_%281878%29_%2819866398454%29.jpg
