MYSIDEA. 645 



was without the two subapical naked setae, which in other species 

 give a barbed appearance to the extremity ; but it may be that this 

 was owing to mutilation ; on the sides of this segment there were two 

 remote minute spines. The carapax is considerably higher posteriorly 

 than anteriorly. 



EUPHAUSIA SUPERBA. 



Carapax brevissime acut&que rostratus. Segmentum abdominis Qtum 5to 

 vix lonyius. Articulus antennarum Imarum primus apice productus 

 et obtusus. Squama basalts antennarum 2darvm basi vix brevior. 

 Articulus pedum ultimus pertenuis, penultimo multo brevior. Segmen- 

 tum abdominis posticum lamina caudali proximo, paululo brevius. 

 Branch ice ramulis sefiformibus instructs, poster lores ad basin involutes, 

 ramis radialis arcuiformibus instar rotce cum ramulis prcelonyis sub- 

 radiatim ciliatis. 



Carapax with a very short and acute beak. Sixth segment of abdomen 

 hardly longer than fifth. First joint of inner antennse produced 

 at apex and obtuse. Basal lamina of outer antennas very slightly 

 shorter than base. Last joint of feet very slender, much shorter 

 than penult. Last abdominal segment slightly shorter than adjoin- 

 ing caudal lamina. Branchiae furnished with setiform branchlets ; 

 the posterior pair involuted at base, and having branches radiating 

 around somewhat wheel-like, branches curving, and furnished on 

 outer (posterior or inferior side) with long setiform branchlets, sub- 

 radiate or spiral in position. 



Plate 43, fig. la, animal, enlarged two diameters; b, upper view 

 of beak, eyes, and base of first antennae; c, caudal extremity; d, 

 under view of mouth, showing maxillipeds and extremity of mandi- 

 bular palpi ; e, mandible ; /, maxilla ; g, languette ; h, shorter branch 

 of first pair of abdominal legs ; A', basal portion of same pair of legs ; 

 h", a process of shorter branch, more enlarged; h'", ciliated natatory 

 lamina of same ; i, second pair of abdominal legs ; k, basal portion of 

 third pair of thoracic legs, with branchia and natatory branch ; I, 

 stomach, profile or side view; m, stomach, opened longitudinally above, 

 and showing inside the view as seen by transmitted light, the dark 



162 



