Chapter VII: The Prosomatic Segments of Limulus and Its Allies

Comparison of the trigeminal with the prosomatic region--The
prosomatic appendages of the Gigantostraca--Their number and
nature--Endognaths and ectognath--The metastoma--The coxal glands--
Prosomatic region of Eurypterus compared with that of Ammocoetes--
Prosomatic segmentation shown by marks on carapace--Evidence of
coelomic cavities in Limulus--Summary 233