Primary Mental Abilities:
Verbal Comprehension (Measured by VCI)
Word Fluency (Measured by VCI)
Numerical Ability (Measured by FRI)
Spatial Visualization (Measured by VSI)
Perceptual Speed (Measured by PSI)
Associative Memory (Measured by WMI)
Reasoning (Measured by FRI)
Secondary Mental Abilities:
Crystallized Intelligence
Fluid Intelligence
Tertiary Mental Abilities
Emotional Perception
Emotional Understanding
Emotional Utility/Engagement
Emotional Management
Primary and secondary are actually a thing, tertiary was created on that debate server as emotional intelligence does indeed help in problem solving believe it or not. Then same cannot be said for social intelligence.
Secondary mental abilities are organized clusters of primary mental abilities. Sorry about using 'primary mental abilities' in the definition of secondary, but it was the best way to explain it. Basically, primary mental abilities are like pieces of an erector set or Legos. On their own, they are unique and exclusive ways to measure intelligence, but you can't really do much with a single Lego or a piece of an erector set. What secondary mental abilities do is hook primary mental abilities together into something measurable and functional.
The two big pieces of secondary mental abilities are looking at whether information is new to the person or if the information is already known by the person. Fluid intelligence is a person's ability to think laterally and understand new and novel ideas. This is one type of mental ability that decreases as we age, and basically consists of most of the primary abilities dealing with taking in new information and then figuring it out.