Note 328 — Chapter VIII · THE DIGESTIVE ORGANS, JAW, AND RADULA: EXCRETORY ORGANS
Reading edition
According to Moquin-Tandon (Moll. de France, i. p. 44) this process in Bithynia is attached by one end to the wall of the stomach. Vivipara, with two jaw pieces, does not possess this stylet; Bithynia, which does possess it, has no jaw.