22 



The wing-like expansion at the end of the arm has its edge finely serrate and 

 4.dentate. The upper surface of the wrist and the outer surface of the palm 

 are more or less covered with pustules similar to those on the carapace. The 

 palm has its crest sharply 6- or 7-dentate and its lower surface uniformly covered 

 with bead-like granules. 



The sterna corresponding to the 2nd, 3rd and 4th pairs of legs are much 

 inflated. 



Bay of Bengal, off the Madras coast, 91-112 fms. 



In the yaung the tubercles on the carapace are sharper, and extend further 

 backwards. 



Ortmann, Zool. Jahrbucher, Syst. etc., X. 1897, p. 296, states that this 

 species is absolutely identical with the Calappa japonica previously established 

 by him in Zool. Jalirb. Syst. etc. VI. 1892, p. 566. 



MuRSiA, Desmarest, Edw. 



Jfttista, Deamareat, Consid. Gen. Cruat., p. 108, pi. 9, fig. 3 : Latreille, in Cnvier, Efegne Animal, ed. 2, 

 1829, p. 39; and Milne-Edwards in Cnvier, K&gne Animal, ed. 3, p. 54 : Milne-Edwards, Hist. Nat. Crnat. II. 

 109: Lamarck, Hist. Nat. Anim. sans Vertebr. V. 486: De Haan, Faun. Japon. Crust, p. 68 and p. 125: Dana, 

 U. S. Expl. Exp. Crnst. pt. I. p. 391 : Miers, Challenger Brachynra, p. 290, {uhi synon.}: Alcock, J. A. S. B. 

 Vol. LXV. pt. 2. 1896, p. 149. 



Thealia, Lucas, Ann. Soc. Entomol. France (I) VIII. 1839, p. 577. 



Carapace oval, moderately convex, rounded in front, rather suddenly con- 

 tracted behind, the evenly-arched antero-lateral margins ending in a large lateral 

 epibranchial spine. 



Front with a small acuminate tip. 



Orbits rather large, oval, with at least one closed but distinct fissure in the 

 upper margin, and with two wide gaps in the lower margin, in one of which the 

 basal joint of the antenna is lodged. Eyes large, eyestalks short and thick. 



The antennules fold obliquely. The basal joint of the antennas is not dilated. 



There is no distinct epistome, but, as in Calappa, the endostome is pro- 

 longed into a canal, which however is but incompletely divided longitudinally, 

 the septum being httle more than a ridge anteriorly, though well developed post- 

 eriorly. As in Calappa the first pair of maxillipeds give off each a lamellar 

 process to complete this efferent canal below. 



The external maxillipeds do not meet across the mouth, but, as in Calappa, 

 leave exposed between them the mandibles, and, in front, the leaf-like prolong- 

 ations of the first maxillipeds. 



The chelipeds are enlarged, much as in Calappa ; but the meropodite, or "arm," 

 instead of a transverse crest near the distal end of its outer surface, has merely 

 a ridge with one or two spines : the palm is compressed and its upper border 

 forms a dentate crest, but not such a high one as that of Calappa. As in Calappa 



