PLATE IV. 



FiGUEE 16.— Chiridotea ceeca Harger (p. 338); dorsal view, enlarged nearly foui 

 diameters ; natural size indicated by the line at the right. 



17. — ^The same ; a, antennula ; 5, antenna ; each enlarged twelve diameters. 



18» — The same ; a, maxilliped from the right side, external view ; ?, external 

 lamella ; m, maxilliped proper; 1, 2, 3, first, second, and third segments 

 of the palpus of the maxilliped, enlarged twenty diameters ; 6, one of 

 the first pair of legs, magnified twelve diameters; e, uropod from the 

 left side, inner view, showing the two rami articulated near the tip. 



19. — The same ; pleopods of second pair from the right side, anterior views, 

 enlarged ten diameters; a, common form in males; b, rarer form in 

 male ; s, elongated stylet, articulated near the base of the inner lamella; 

 c, form in the female. 



20. — Chiridotea Tuftsii Harger (p. 340); female; dorsal view, enlarged five 

 diameters; natural size indicated by the line at the right. 



21. — The same; left maxilliped, enlarged twenty-five diameters; e, external 

 lamella ; m, basal segment ; 1, 2, 3, segments o£ palpus. 



22. — The same ; pleopod of the second pair, fit)m a male, enlarged twenty 

 diameters ; «, elongated stylet, articulated near the base of the inner 

 lamella. 

 (All the figures were drawafirom nature by O. Haxger.) 



