CRUSTACEA — WHITELEGGK. 195 



Orbital boi-der smooth, elevated ; the cavity loiij^er than broad ; 

 inner anj^le prominent, obtuse, outer an^h; with a very small 

 tubercle; anterior extra-orbital anj^^le acute, equal to the brejulth 

 of the orbit, and proiectinj,^ about the same distance bc^yond it. 

 Upper surface of carapace minutely and remotely hairy, central 

 area punctate, nearly smooth, hepatic and branchial regions more 

 or less granulose. There is a pair of prominent lateral carinse 

 commencing at the inner angle of the orbit from the latter point 

 to the ill-defined cervical groove ; the course of the carinas is 

 straight, from thence they are slightly curved outwards, and 

 terminate near the hinder margin ; each keel is capped by a series 

 of short ridges, which are slightly higher at their anterior end, 

 but are scarcely dentiform. 



The gastric region is moderately elevated, and is bounded in 

 front and laterally by a sharply defined narrow groove ; anteriorly 

 there is a short ridge, and posteriorly a broadish tubercle, and a 

 smaller one on each side near its outer limits. 



Cardiac region somewhat higher than the gastric, with a sub- 

 median pair of short granular ridges anteriorly, and a widely 

 separated pair of granules posteriorly. Hinder margin of cara- 

 pace with a transverse line of four or five granules situated near 

 the centre. 



Pleon smooth, without any distinct arborescent markings ; the 

 first three segments with a well-marked median notch on the 

 posterior border, second to fifth slightly carinate centrally ; the 

 second is rather higher than the rest, and somewhat granulose ; 

 sixth segment with an obscure pair of widely separated lobes on 

 the posterior border. 



There are four pairs of pleopoda, but the first pair are wanting ; 

 the rami are long, narrow and setiferous ; the inner ramus is 

 equal in length to the peduncle, and bears a single stylamblys, 

 which is a little longer than the ramus, somewhat swollen apically 

 and tipped by a series of small papillae. 



The distal margin of the calcified portion of the outer ramus of 

 the uropod is truncated and bidentate ; that of the inner ramus 

 is oblique and tri- or quadridentate. The telson is marked by a 

 pair of short, elevated, longitudinal ridges, situated proximally 

 and rather nearer the margins than the centre ; the calcified 

 portion has a deep, broad, central emargination, and each distal 

 border is transversely truncated and bispinose ; the spines are 

 subequal ; there is one on the inner and another on the outer 

 angle. 



Eyes dark brown, with lighter reticulations; cornea 0'9 mm. 

 in diameter ; the outer margin of the orbit is separated from the 

 external border of the carapace by a space about 0'3 mm. wide. 



