pet-store employee was bitten on the wrist by a specimen that hung on for 1.5 minutes. Some mild swelling resulted, but after nine hours, the victim claimed to have experienced three bouts of muscle paralysis, during which he fell and was unable to move or speak, but a medical examination did not produce any unusual results. The symptoms described possibly were the result of anxiety. The liquid venom yield ranges from 0-50 microliters and the solid venom yield is 1.3 mg. Taxonomy This species was once considered to constitute a single monotypic genus, Cyclagras References Further reading Boulenger GA (1894). Catalogue of the Snakes in the British Museum (Natural History). Volume II., Containing the Conclusion of the Colubridæ Aglyphæ. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xi + 382 pp. + Plates I-XX. (Genus Cyclagras and species Cyclagras gigas, p. 144). Duméril A-M-C, Bibron G, Duméril A[-H-A] (1854). Erpétology générale ou histoire naturelle complète des reptiles. Tome septième. Première partie. [= General Herpetology or Complete Natural History of the Reptiles. Volume 7. Part 1.] Paris: Roret. xvii + 780 pp. (Xenodon gigas, pp. 761–763). External links Colubrids Snakes of South America Reptiles of Argentina Reptiles of Bolivia Reptiles of Brazil Reptiles of Paraguay Fauna of the Pantanal Taxa named by Gabriel Bibron Taxa named by André Marie Constant Duméril Taxa named by Auguste Duméril Reptiles described in 1854