L. ovalis opaca. Oval, opake leucophra.
Though at first sight it may be taken for a variety of the leucophra virescens; yet, on a further examination, it differs in many particulars; it cannot lengthen and shorten itself as that does. It is also much smaller. Sometimes it appears contracted in the middle, as if it were about to be divided in two.
150. Leucophra Bursata.
L. viridis, ovalis, antice truncata. Green oval leucophra, the fore-part truncated.
This is similar in many respects to the foregoing leucophra; it is of a long oval shape, bulging in the middle, and filled with green molecules; every where ciliated, except at the apex, which is truncated, and shaped somewhat like a purse; the hairs larger, and sometimes collected in minute fasciculi. It is to be found in salt water.
151. Leucophra Posthuma.
L. globularis, opaca, reticulo pellucenti. This is globular and opake, covered as it were with a pellucid net. It was found in fetid salt water.
152. Leucophra Aurea.
L. ovalis, fulva, utraque extremitate æquali obtusus. Oval yellow leucophra, both ends of it equally obtuse.
The little hairs are discovered with difficulty; it has, in general, a vehement rotatory motion.