454 REPOKT OF COMMISSIONER OF FISH AND FISHERIES. 



diameters ; /, one of the sixth pair of legs ; g, uropod, each enlarged 

 twenty diameters. 

 (Figure 14 was drawn from nature by Mr. J. H. Emerton, the others by O. Harger.) 



PLATE IV. 



FIGURE 16. Chiridotea co3ca Harger (p. 338) ; dorsal view, enlarged nearly four 

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



17. The same ; a, antennula ; 6, antenna ; each enlarged twelve diameters. 



18. The same; a, maxilliped from the right side, external view; I, external 

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

 of the palpus of the maxilliped, enlarged twenty diameters ; l>, one of 

 the first pair of legs, magnified twelve diameters; c, 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; 6, 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 of palpus. 



22. The same ; pleopod of the second pair, from a male, enlarged twenty 

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

 lamella. 

 (All the figures were drawn from nature by O. Harger.) 



PLATE V. 



FIGURE 23. Chiridotea Tuftsii Harger (p. 340); a, antennula; 6, antenna; c, leg of 

 the first pair ; d, leg of the fourth pair ; all enlarged twelve diameters ; 

 e, left uropod, or opercular valve, inner view, enlarged ten diameters. 



24. Idotea irrorata Edwards (p. 343); dorsal view, enlarged two diameters; 

 natural size shown by the line on the left. 



25. The same ; a, antennula ; 6, antenna ; c, left uropod or opercular valve, 

 external view ; all enlarged six diameters. 



26. The eamo ; a, right maxilliped, enlarged twelve diameters, I, external 

 lamella ; m, basal segment ; 1, 2, 3, 4, segments of palpus of maxilliped ; 

 b, pleopod of the second pair from a male, enlarged eight diameters, show- 

 ing stylet, s, articulated near the base of the inner lamella. 



27. Idotea phosphorea Harger (p. 347); dorsal view, enlarged about two 

 diameters ; natural size shown by the line on the right. 



28. The same ; a, antenna, enlarged six diameters ; &, maxilliped, enlarged 

 twelve diameters, showing, I, external lamella ; m, basal segments ; 1, 2, 

 3, 4, segments of the palpus of maxilliped ; c, leg of the first pair ; d, leg 

 of the second pair, both enlarged six diameters ; e, right uropod, or 

 opercular valve, inner view, enlarged six diameters. 



29. The same ; pleopod of the second pair from a male, enlarged eight diam- 

 eters ; s, stylet articulated near the base of the inner lamella ; ', distal 

 end of stylet reversed and enlarged thirty diameters. 

 (Figure 24 was drawn by Mr. J. H. Emerton, the others by O. Harger.) 



PLATE VI. 



FIGURE 30. Idotea robusta Kroyer (p. 349) ; dorsal view, enlarged two diameters ; 



natural size shown by the line at the right. 



31. The same; a, antenna; &, leg of th<> first pair, each enlarged six diam- i 

 eters : c, left uropod, or opercular valve, inner view, enlarged four 

 diameters. 



