4 ORTMANN 



and concave posteriorly. Sternum between fifth pereiopods 

 with a strong, triangular, anteriorly directed, spiniform process. 



Description of adult male of 'Jirsl form : 



Rostrum subovate, upper face slightly concave, margins 

 elevated, converging, without marginal spines, contracted into 

 a short, triangular acumen, which is shorter than the width of 

 the rostrum at the base. Postorbital ridges subparallel, ante- 

 riorly without spines. Carapace rather compressed, covered 

 with punctations, which are rather large on gastrical region and 

 base of rostrum ; sides of carapace finely granulated, granules 

 more distinct on hepatical region. Suborbital angle blunt. 

 Branchiostegal spine short, tuberculiform ; cervical groove 

 slightly sinuate ; no lateral spines on the sides of the carapace ; 

 areola wide, with four to five irregular rows of punctations, 

 slightly longer than half of the anterior section of the carapace 

 (including rostrum). 



Abdomen as wide as, and longer than, carapace ; basal seg- 

 ment of telson with three or four spines on each side ; posterior 

 segment semicircular. 



Eftistoma with anterior part broadly triangular, sharply 

 pointed in the median line ; lateral margins concave anteriorly, 

 convex posteriorly ; aniennal scale broad, greatest width ante- 

 rior to the middle ; flagellum rather short, reaching to the second 

 or third abdominal segment. 



First -pcreio-pods rather stout; hand elongated-ovate, slightly 

 compressed ; surface with strong, subsquamiform tubercles, dif- 

 fering in color from the surface of the hand, being, in alcoholic 

 specimens, bluish black, while the rest of the hand is brownish 

 yellow ; tubercles irregularly distributed, but with the tendency 

 to form two or three rows near the inner margin, and slightly 

 more crowded on the rounded outer margin of the hand ; on 

 under surface of hand, the tubercles are more remote from each 

 other, and not colored differently from the surface. Fingers 

 distinctly longer than the palm, slightly gaping at the bases, 

 each with a smooth longitudinal rib on outer and inner face, 

 included by rows of punctations ; tubercles of palm extending 

 upon bases of both fingers, and forming a short row upon prox- 

 imal part of outer margin of movable finger ; cutting edges with 



