The bisphenoids (the hemihedral forms of the tetragonal and rhombic bipyramids)., and the trigonal pyramid of the hexagonal system, are examples of non-regular tetrahedra (see Crystallography). [Please select]
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It crystallises in long fine needles or thin rhombic plates, and melts at 89. [Please select]
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5; front claws elongate, curved; hinder short and acute; sole of foot hairy behind, bald in front, and rhombic for half the length of the foot, with three large oblong pads on the front, and three small ones on the hinder edge; toes elongate; thumb short; fur black, like _Herpestes_; tail moderate, sub-cylindrical; teeth, 38; premolars, 4--4/4--4; grinders, 5/6. [Please select]
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