PLATE XII. 



Figure 74. — Ptilanthura tenuia Harger (p. 406); a, antermula; ft, antenna; each, 

 enlarged twenty diameters, from a male. 



75. — Gnathia cerina Harger (p. 410) ; male ; dorsal view, enlarged ten diame- 

 ters. 



76. — ^The same ; a, antennula ; ft, antenna, each enlarged thirty-eight diame- 

 ters; c, mandibles {I, left, r, right), enlarged thirty-eight diameters; 

 d, first leg or first gnathopod from the right side, enlarged twenty-five 

 diameters ; all the figures from the male sex. 



77. — The same (p. 411) ; female ; dorsal view, enlarged ten diameters. 



78. — The same ; a, one of the first pair of legs or first gnathopod of a female, 

 enlarged thirty-eight diameters; ft, one of the first pair of legs in a 

 young, parasitic individual, enlarged sixty diameters; c, pleon, with 

 the last and part of the penultimate thoracic segments of a female, 

 dorsal view, enlarged twenty diameters ; d, pleopod of a young, pari- 

 sitic individual, enlarged sixty diameters ; e,. pleopod of an adult male, 

 enlarged sixty diameters, 



79. — ^The same ; young male ; dorsal view, enlarged twenty diameters. 



80. — ^Leptochelia algicola Harger (p. 421); male; lateral view, enlarged 

 twenty diameters ; natural size indicated by the line above. 

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



