Faxon, Lucifer. 119 



EXPLANATION OF FIGURES. 



Figure 1. — Lucifer typus M. Edw. ? 9 ram. in length, a, eye- 

 stalk ; b, antenna of first pair ; c, antenna of second 

 pair ; d, " scale " of second antenna ; e, labrum ; /, 

 second maxilliped ; g, third maxilliped ; h, i, k, ap- 

 pendages corresponding to the first, second and 

 third pairs of legs of the higher Decapods ; I, sac 

 at the end of the vas deferens ? m, first abdominal 

 appendage ; m' , copulatory organ on the first ab- 

 dominal appendage ; m", terminal branch of the 

 first abdominal appendage; n, n f , n", n" r , second 

 abdominal appendage with its three terminal 

 branches ; o, p, q, third, fourth and fifth abdom- 

 inal appendages with their two terminal branches ; 

 r, r' , r", basal segment, outer and inner branches 

 of the sixth abdominal appendage ; s, antennary 

 segment ; s', spine on antennary segment ; t, cara- 

 pace ; v , x, y, z, a, /?, first to sixth abdominal seg- 

 ments ; y, telson ; 6, nervous cord in the thorax ; 

 e, auditory organ in basal segment of first antenna ; 

 C, spine on the carapace. 



Figure 2. — Do. Mouth-parts of left side, a, labrum; b, man- 

 dible; c, metastoma; d' , outer lobe of first max- 

 illa ; d", inner lobe of first maxilla ; d'", palpus 

 of first maxilla; e' ', second maxilla; e", scaphog- 

 nathite ; /, first maxilliped ; g, second maxilliped. 



Figure 3. — Do. Prehensile male organ on the anterior border 

 of the first pair of abdominal appendages, \ inch 

 objection, a, movable piece which closes upon the 

 process b ; c, muscles which move a. 



