EXPLANATION OF FIGURES. 

 Linuparus atavus. 



Figure 1. — Upper view of larger specimen. -£ nat. size. (Some details of struc- 

 ture of the carapace are supplemented from the smaller specimen.) 



Figure 2. — Frontal parts of carapace and base of antennae, viewed from above, 

 and showing stridulating apparatus. Nat. size (large specimen). 



Figure 3.— do., viewed from below. Nat. size. — a. Longitudinal groove, divid- 

 ing the epistoma ; b. Phymacerite ; c. Basal joints of antennulae. 



Figure 4. — Linuparus trigonus (dH.), living Japanese form, the same parts as 

 in fig. 3, copied from the "Fauna Japonica " for comparison. £ nat. 

 size. 



