in ichthyology, a genus of fishes belonging to the Amphibia Nantes of Linnaeus. The accipenser has a single linear nostril: the mouth is in the under part of the head, and contains no teeth; the cirri are below the snout, and before the mouth. There are four species of this genus, viz. 1. The sturio, or flurgeon, with 4 cirri, and 15 squamous protuberances on the back. It inhabits the European seas. This fish was so greatly esteemed in the time of Severus, that he ordered it to be carried to his feasts by servants crowned with garlands, and trumpets playing before. See Plate I. fig. 5. 2. The ruthenus has 4 cirri, and 15 squamous protuberances. It is a native of Russia. 3. The budo has 4 cirri; the body is naked, i.e., has no prickles or protuberances. The skin of the budo is so tough and strong, that it is employed for ropes in carts and other wheel-carriages. Hinglass is also made of the skin of this fish, and its eggs are sometimes made into pickles. It inhabits the Danube, and the rivers of Russia. See Plate I. fig. 6. 4. The plecostomus, which is distinguished from the other three by having only 2 cirri. It is a native of Surinam. The whole four species are viviparous.