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Show 218 MR. T. D. A. COCKKRELL ON THE [Apr. 7, External genital orifice on a pale patch, below and slightly anterior to respiratory orifice. No regular dorsal grooves. Genital orifice from head 13, from respiratory orifice 5, from sole 2\ millim. Respiratory orifice from head 16, from genital orifice 5, from sole 7 millim.. Described from a specimen in the British Museum, from the south side of Cook's Straits, N e w Zealand (Wellington Museum). Hyalimacince. Contains the genus Hyalimax, H. & A. Ad., with one species in the Andaman Is., one in the Nicobar Is., one in Bourbon, two in Mauritius, and one only on the Asiatic mainland-H. viridis Theob., of Pegu. Succineince. The typical but testaceous genus Succinea is widely distributed in both hemispheres. A slug-like genus, Omalonyx, d'Orb, is found in Trinidad, British Guiana, Brazil, and La Plata, and reported also from Guadeloupe and Juan Fernandez. A specimen in the British Museum from Pernambuco (H. N. Ridley) may be 0. patera, During ; it is paler and less marked than O. unguis, Fer. VAGINULID.E.- Veronicellince. This subfamily consists of the genus Veronicella, Blainv. (Vaginula, Fer.), with very numerous species in tropical regions, and the monotypic genus or subgenus Leonardia, Tapp.-Can., which differs in the more posterior position of the female genital orifice. The genus Veronicella consists of about 133 species, distributed as shown on pp. 219-220. The correct numbers cannot be exactly ascertained, as it is probable that some of the species will prove synonymous with others, while others may have to be placed in distinct genera \ It is also probable that many species remain to be discovered. The numbers given for each country, added together, make more than the total of 133, owing to the fact that several species inhabit more than one country. As a rule, however, the species have not a wide distribution ; very many are peculiar to islands. There are no species in the Palsearctic or Nearctic Regions, the occurrence of V. fioridana in Florida being merely an indication of the West- Indian affinities of the fauna of that State ; while the anomalous fact of a species (V. schivelyce, Pilsbry) in Bermuda seems to find its explanation in the probable introduction of the Bermuda species 1 For example, I have recently examined specimens in the British Museum from the Neotropical region which seem worthy of at least snbgeneric distinction, namely a species from Rio Janeiro referred to V. taunaysi, Fer., and the true Veronicella lavis, Blainv., from Jamaica. Ferussac's name Vaginula may be used for the former, and thus we get:- (1) Veronicella, Blainv. Sole narrow, rounded and not projecting beyond mantle posteriorly. Female genital orifice post-median. (Type, V. Icevis, Blainv.) (2) Vaginula, Fer. Sole broader, projecting beyond mantle posteriorly. Female genital orifice antemedian. (Type, V. taunaysi, Fer.) |
