In all but the first case (Tironian note) you can move the mouse pointer over the image to illustrate the contraction or suspension.
Representation for
12th-century forms
13th-century forms
et (and) This symbol represents the conjunction et (and); its origin is in the Tironian notes used at an earlier time as a form of shorthand; this is the only symbol to survive from those notes; it is called the tironian et; by the thirteenth century, it had a horizontal stroke through the descender or tail, but in the twelfth century it was constructed without this horizontal stroke so that it resembles then a number 7; it is also used [see below] finally in words to represent -et
minims omitted by
a horizontal line
Left: Om[n]ib[us]
Annuati[m]: in this case the contraction represents the 3 minims in final -m
horizontal line as a general contraction
Left: u[est]ra. Right: in Joh[ann]i and B[eat]e; another example is forms of h[ab]ere
horizontal line as a medial -er- contraction when formed through the ascender of h or b for example here in lib[er]e; it is used on h in forms of h[er]es
per/par (for per alone,
or initially and medially in words)

Left: super
The upper example here is p[ar]te
The lower example is per, a preposition with the acc.
pre- (initially in words) here in p[re]sentes
pro this contraction usually stands alone in pro (for: preposition + abl.)
Left: in the twelfth century it is simply a horizontal stroke with a loop on the left.
-bus (finally in words: abl. and dat. cases) resembles a b with an attached z with a tail
-et (finally in words, as in 3rd.pers.sing.verb forms)
and in conjunctions such as scilicet and videlicet

here in p[er]tin[et] (3rd.pers.sing.verb form) and scil[ic][et]
medial -er- Left: fu[er]it; right t[er]ram
final -que resembles a q with an attached z with a tail
final -rum The origin of this is as a general suspension on the character r in the Arabic 2-r form, so that it meant any suspension of a word on the r; an example would be Sar' by which was intended something like Sarisberiensis ; conventionally, however, it came to represent -rum, most usually at the end of the genitive plural form of nouns: here st[er]lingor[um]
general suspension a general suspension might be represented by a horizontal line over the main part of the word OR a flourish above the line on the final character; here the example is the flourish on the final r, here in denar[ios] (demonstrably accusative plural in the document)
superscription The omission of a character is sometimes represented by the following character being placed superscript; most usually, but not exclusively, the omitted character is an r; the example here is ac[r]as, in which the superscript a represents the omission of the r; occasionally, however, superscription is otiose, that is there is no previous character omitted
initial con- initial con- (as here in confirmaui) is frequently reduced to this contracted form, although it is also sometimes fully extended, from the twelfth century onwards; the contraction resembles a number 9 on the same horizontal level as the other characters; a similar contraction was used for final -us (see below), but above the line
final -us
final -us occurred most frequently in the of verbs, such as here [bottom]Warantizabim[us], but it can be more generally used as here [top] in san[us];
Left: Walter[us]
In the twelfth century it is also encountered as one form of the contraction for final -bus.
-ur- is represented by a superscript arabic 2-r; it can be used medially (here [top] as in Fut[ur]i) or finally (in the case of passive forms of verb, esp. the 3rd.pers.sing.passive) as here [bottom] includitur [in which the 2-r has a small tail]
In the twelfth century, it resembles a superscript a with a tail.

Some general comments