72 Bulletin of Zoological Nomenclature Mytihus modiolus and all species which have been referred to Modiolus [vel Modiola] differ from Mytilus s.str. (type species Mytilus edulis Linnaeus, 1758) in the absence of hinge-teeth. ScopoU, however, divided his Gens Bivalvia into two groups. " Distributio I " and " Distributio II ", the former character-ized as " cardine edentato " and the latter as " cardine dentato ". He included the genus Mytilus (of which he cited no species) in the former and Volsella in the latter. Moreover, the generic diagnosis of Volsella, states " cardo . . . terminant denticuli exigui ", and Mytilus modiolus Linnaeus, is described by Scopoli as " dente unico ". Scopoli's whole treatment of these mussels is, there-fore, most confused, and it seems obvious that he did not intend to apply the name Volsella to the group familiarly known as Modiolus or Modiola. 3. Vulsella is a very familiar name for a genus of Tertiary and living pelec)^ods and a family name vulsellidae is derived from it ; it is highly desirable that it should be stabilized and placed on the Official List of Generic Names. SUPPORT FOR THE PROPOSALS RELATING TO THE GENERIC NAMES " CRANGON " FABRICIUS, 1798, " CARCINUS " LEACH, 1814, AND " SCYLLARIDES " GILL, 1898 (CLASS CRUSTACEA) SUBMITTED BY DR. L. B. HOLTHUIS By RICARDO ZARIQUIEY (Enfermedades de la Infancia, Barcelona, Spain) (Commission's reference Z.N.(S.)231, 209, 473) (Letter dated 25th July 1951) Estudiadas detenidamente las propuestas Z.N.(S.)231 sobre el uso de Ids nombres genericos Crangon Fabricius, 1798, y Alpheus Fabricius, 1798, la Z.N.(S.)209 sobre el uso del nombre generico Carcinus Leach, 1814, y la Z.N.(S.) 473 sobre el nombre generico Scyllarides Gill, 1898, debo manifestarle que estoy de acuerdo con las conclusiones de las mismas y que Vote " SI " a lo que propone el Dr. L. R. Holthuis, ponente de las mismas.