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Show 586 MR. A. H. GARROD ON THE [Nov. 3, tenuato; apertura verticali, subovali, marginibus callo restricto junctis; columella arcuata ; labro sinuato, obtuso, vix crenulato. Long. 6, diam. 9 mill. Apert. intus 6 mill, longa, 4 lata. Hab. Borneo. POROMYA FORBESI, H. Ad. (Plate LXIX. fig. 6.) P. testa transversa, subovali, ventricosa, tenui, albida, subpellucida, radiatim. exiliter punctata, epidermide tenui fiavida scabra umbonibus tumidis, eminentibus, submedianis : extremitate ovata ; extremitate posteriori oblique truncata, ad marginem dorsalem compressa; margine ventrali arcuato. Long. 20, alt. 14, lat. 9 mill. Hab. ? The genus Poromya of Forbes (-=Embla of Loven) has been considered to be synonymous with Thetis of Sowerby and Eucharis of Recluz. It should be kept separate from both, and they also be recognized as distinct genera. Thetis, of which I am not aware of there being any recent species, appears to belong to the family Veneridae, while the others are members of Corbulidse. P.S.- Since writing the above I find that a specimen of Neritopsis radula, with its operculum, has been received by Dr. Souverbie from Ouagap, one of the Caroline Islands, and that the operculum has been described by him in the April Number of the ' Journal de Con-chyliologie.' EXPLANATION OF PLATE LXIX. Fig. 1, 1 a. Apicalia holdsworthi, p. 585. 2. Tudicla spirilla, p. 585. 3. Barclayia incerta, p. 585. 4, 4a, 4b. Operculum of Neritopsis radula, p. 585. 5, 5 a. Paludomus luteus, p. 585. 6. Poromya forbesi, p. 586. 6. On some Points in the Anatomy of the Parrots which bear on the Classification of the Suborder. By A. H. G A R R O D, B.A., F.Z.S., Fellow of St. John's College, Cambridge, Prosector to the Society. [Eeceived September 15, 1874.] (Plates LXX. & LXXI.) In a former communication*, a review of certain of the most variable characters found amongst the Columba enabled me to give hints with regard to the mutual relationships of the different genera of that considerable family, which I hope will be found of service. On the present occasion it is my desire to follow out a similar method, taking the Psittaci, a suborder quite as, and perhaps even more, difficult to arrange by external features only. * P. Z. S. 1874, p. 249. |
