This corre sponds to the usual pre sence (in the Rhyncho- bdellidae) of three annuli to each segment.
So that a leech in which only twenty-seven segments are apparent by the enumeration of the annuli, separate ganglia, nephridia, lines of sensillae upon the body, really possesses an additional seven lying behind that which is apparently the last of the series and crowded together into a minute space.
The annuli into which segments are externally divided are so deeply incised as to render it impossible to distinguish, as can be readily done in the Oligochaeta as a rule, the limits of an annulus from that of a true segment.
As remarked, the prevalent number of annuli to a segment is three in the Rhynchobdellidae.
But in that group (Cystobranchus) there may be as many as eight annuli.
In the Gnathobdellidae the prevailing number of annuli to a segment is five; but here again the number is often increased, and Trocheta has no less than eleven.
The jus annuli aurei, or right of wearing a gold ring, originally a military distinction, became a senatorial privilege, which was afterwards extended to the knights and gradually to other classes.
These constellations were arranged in three concentric annuli, the northern ones in an inner annulus subdivided into 60 degrees, the zodiacal ones into a medial annulus of 1 zo degrees, and the southern ones into an outer annulus of 240 degrees.
annulush at age of each pike was back-calculated using annuli of individual scales.
annulusbility to center the annuli is absolutely essential in order to get the best imaging.
annulusns the image into elliptical annuli or a fan-shaped region of adjacent sectors.
annulus>Wider apertured annuli are useful but do not seem to provide the subtle effects so easily.
annulusu have a phase contrast condenser, the largest phase contrast annuli often make excellent patch stops for darkfield!
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