The "Instituto Oceanográfico", of the University of S. Paulo, lent me several tornariae for studying purposes. These larvae were obtained from samples of plankton collected off the Island of Bom Abrigo (see map) and off Cananéia on the South Coast of Brazil, State of S. Paulo. The samples were taken from a depth of 10 mts., more or less. Fr. Müller mentioned (1898) the existence of Tornaria which probably belonged to Balanoglossus on the coast of Brazil, but did not describe the larvae. No other scientist has published anything on Brazilian tornariae since. All larvae studied from the two samples given me, were larvae without tentacles, answering the general description of the larvae belonging to Stiasny-Wijnhoff and Stiasny's type I tornaria (1931). They are generally middle sized to small. The pre-oral area has the form of an anchor in all three of them, they show the general form of a double cone, the ventral loop is normal, there are no inferior ventral lobes, lateral lobes are present, with ventral loops, and inferior dorsal lobes, the second and third cœloms are situated next to the gut, the middle-gut being large and swollen, according to Stiasny-Wijnhoff and Stiasny's description (1931, p. 185-186) of the tornariae belonging to type I. The description of the three different types of tornariae found in the samples did not correspond to the description of any of the already described tornariae belonging to type I of Stiasny-Wijnhoff and Stiasny's, and so new names were given to them - Tornaria mourei n. sp., Tornaria lilianae n. sp.,