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of the carapace and continued up to the coxopodites of the last pair of legs. Buccal cavity 

 widening backward. External maxillipeds (fig. 26) little gaping, broad, smooth-, ischium trapezoid, 

 with the hind border greatlj' oblique, longer than merus; suture between both joints trans- 

 verse, somewhat curved; merus broader than long, with the external border greatly 

 convex, anterior border concave ; palp short, inserted at antero-external angle of merus, c o n- 

 sisting of three small joints, placed end to end, subequal in length, but diminishing 

 rapidly in breadth; exognath wholly exposed to view, only one-third as broad as ischium, 

 narrowing towards tip, which does not reach as far forward as merus, flagellum distinct. 



The chelipeds are robust, more so in the c? than in the, 9 ; in the fornier sex they are 

 slightly unequal, the right being somewhat the larger. Meropodite short, unarmed, hairy along 

 the edges, inner surface with a triangular facet, bordered by a brown stripe ; wrist small, inner 

 angle rounded ; chela (fig. 2 c) entirely smooth and glabrous, save for some short hairs at inner 

 surface, resembling that of Pimtixa, palm longer than fingers, upper border rounded, basal 

 part of inferior border keeled, fingers short, high, compressed, tips curved, not at all gaping, 

 inner margins wavy and minutely crenulate. 



Walking legs short, in the cf about equal in length to breadth of carapace, in 9 niuch 

 shorter, slightly hairy. The first three pairs are subequal in length, the last pair is only little 

 shorter. Meropodite only twice as long as broad (fig. 21^), anterior and posterior margin somewhat 

 convex, so that the greatest breadth is lying in the middle, posterior margin in its 

 distal half with some short teeth; carpo- and propodite short, the latter but little 

 longer than the former, not narrowed, at least in the 9. towards its distal end, dactyli 

 remarkably minute, even more so in the 9 than in the (-f, immovable, slender 

 and acutely pointed, not hairy. 



The abdomen of both sexes consists of seven segments, clearly separated, and occupies 

 in the 9 completely, in the cT almost so, the space between the bases of the posterior pair 

 of legs. The first segment of the abdomen of the cf is broader than the third and longer than 

 the second segment; the following segments regularly decrease in width; the terminal joint is 

 semi-elliptical, and there is a rather wide distance between the tip of the abdomen and the 

 hind margin of the buccal cavity. Sternal trench of the abdomen not sharply marked anteriorly. 

 The first abdominal appendages of the cf with the hairy tip curved inward, reaching nearly 

 to end of abdomen. Abdomen of 9 broad, segments regularly increasing in length from base 

 to tip, entirely covering the sternum, fourth segment broadest. The whole ventral surface of 

 the 9 at hand is concealed beneath a compact mass of eggs, the diameter of which is about 0.3 mm. 



The general colour of the species is ivory-white. 



I am unable to place this new species into any one of the known genera; as has been 

 already remarked it might, on superficial examination, especially in the case of the transverse 

 9, easily be mistaken for a Pitmixa. Now H. Milne-Edwards described, as early as 1853, a 

 species, Pinnixa brevipes^), from Madagascar, which is remarkable by the following features: 



i) Ann. Sc. Nat. (3), t. 20, 1853, p. 220. The ooly additional reference to this species is given by A. Milne-Edwards (Nouv. 

 Arch. Mus. Paris, t. 9, 1873, p. 320), who reraarks: "the carapace est finement ponctuée et les pinces sont moins comprimées et moins 

 granuleuses (viz. than in " /'////;/.r<j" (^ Tetrias) fischeyV^'). 



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