Anaesthesia of the medicinal leech (Hirudo medicinalis).
D000758:Anesthesia; D000818:Animals; D001566:Benzocaine / Q000494:pharmacology*; D002245:Carbon Dioxide / Q000494:pharmacology*; D007865:Leeches / Q000187:drug effects* / Q000382:microbiology; D008012:Lidocaine / Q000494:pharmacology*
D002245:Carbon Dioxide; D008012:Lidocaine; D001566:Benzocaine