11 
MOLLUSCA MADERENSIA. 
LIMACEA. 
Testa nulla, discus longitudinaliter corpori adnatus, clypeus coriaceus in dorso, 
capiti plerumque approximatus ; apertura respiratoria in dextro clypei margine; tentacula 
reiracfilia 4, superiora majora, apice ociilifera. 
Genus I. 
Arion, 
Corpus postice semiteres, ad finem glandula mucosa praeditum; clypeus granula 
calcarea segregata includens. 
Arion empericorum Fer. 
Tentacula nigra, ora corporis lineolis nigris transversis adornata. 
Arion empericorum Fer. hist. p. 60. t. 2. fig. 1 — 2. 
— — Brandt et Ratzehurg Med. Zool. Vol. II. p. 321. t. 33. fig. 3 — 10. 
— — Lowe priinit. p. 39. 
Limax ater Linnaeus syst. nat. edit. XII. p. 1081. n. 1. 
— — Mulier verm. II. p. 2. u. 200. 
— — Draparnaud hist. p. 122. t. 9. fig. 3 — 5. 
— rufus Linnaeus 1. c. p. 1081. n. 3. 
— — Draparnaud 1. c. p. 123. t. 9. fig. 6. 
— — Lamarck edit. Deshayes T. 7. p. 716. 
— succinens Mulier verm. II. p. 7. n. 203. 
Habitat in Maderae hortis et vineis. 
Varietas occurrit atra, cum subvarietatibus duabus, altera olivacea vel fusco -lutes- 
cente, altera pallidiore coeruleo -cinerascente, nec non varietas nigricans, margine lutes- 
centi vel coccineo (Lowe I. c.). Observationem propriam species effugit. , 
2 * 
