CRYPTOLITHODES ALTA-FISSUEA. 273 



This species may readily be detected from the 

 two previously known by the smoothness of the 

 carapace, propodi, and pleon, and more distinctly 

 by the deep orbital notch on each side of the 

 rostrum. 



The carapace is nearly as broad again as long, 

 and produced considerably, posteriorly to the 

 cardiac elevation, a feature that appears to belong 

 to the female. 



The rostrum is broad, flat, and rectangular. 

 The antero -lateral margins are produced so far 

 anteriorly as to be nearly in a line with the 

 extremity of the rostrum ; a deep notch, in which 

 the eyes are situated, exists on each side of the 

 rostrum. The anterior margin is slightly marked 

 with distant small points ; the posterior margin 

 is quite smooth and even. The dorsal surface is 

 quite smooth, and pencilled in light red upon a 

 yellowish ground, the red pencilling being fine 

 and delicate, following the contour of the margin 

 and surface of the carapace. 



The pleon is subsyminetrical and very smooth, 

 and planted considerably within the posterior 

 margin of the carapace. The second segment 

 (first visible) has the marginal plates fused with 

 the central. The sixth segment is without 

 lateral plates; and the telson is situated beneath 



VOL. II. T 



