Sentence:  "There has been another dive since our meeting, Jacob, and on that dive, we are told, only the first and more prosaic species of <WSD>Solarian</WSD> was observed. Not the second variety which has caused Dr. Kepler so much concern." Jacob was still confused by the hurried explanations Kepler had given of the two types of Sun-creatures so far observed. 
Meaning of the word marked with <WSD> tags:  An inhabitant of the Sun.