We have much pleasure in dedicating this singular species to Mr. Lovell Reeve, who has evinced much interest in the shells of this group. The last whorl is acutely angulate posteriorly, and the spire is tabulated, giving to the shell a peculiar truncate appearance.
12. Physa (Ameria) bonus-henricus, Adams and Angas.
P. testa ovata, rimata, tenui, cornea; spira vix elata, plana; anfractibus tribus, planis, postice angulatis, ultimo magno, inflato, ventricoso, postice subangulato, longitudinaliter plus minusve plicato; apertura ovata; labio tenui, subtortuoso; labro simplici, margine arcuato.
Long. 4 lines, lat. 2 1/2 lines.
Habitat. Arnhem's Land (Coll. Angas.)
This is a small inflated species, with a short truncate spire. We have dedicated it to the founder of the section Ameria, a gentleman well known for his deep researches in conchology.
13. Unio (Alasmodon) stuarti, Adams and Angas.
U. testa transversim elongato-ovata, tenui, compressa, epidermide olivaceo-fusca induta, postice corrugato-plicata, latere antico breviore rotundato, postico longiore oblique subtruncato, margine ventrali regulariter arcuato; umbonibus parvis, erosis, dentibus cardinalibus elongatis valde divergentibus, postico bifido, antico prominulo; intus iridescente.
Alt. 1 1/2 inch, lat. 3 inches 2 lines.
Habitat. Lagoon, Mount Margaret, Central Australia (Coll. Angas.)