246 



spiny, the posterior edge having only a single terminal spine ; the propodite has 

 the posterior edge distantly spinulate ; and the dactylus has the anterior edge 

 crenulate. 



The first abdominal appendages are absent in the male. 



Colour in life dull red. 



A male 54 millim. long has the larger cheliped 87 millim. in length. 



Andaman Sea, 180, 185, 188-220, 194, and 240 fathoms. Arabian Sea, off 

 Ceylon, 142-400 and 180-217 fathoms. 



This species is very closely related to the Atlantic and Mediterranean M. 



ti'itiiimana. 



-D J AT C892-6893 /m ,, . . 9153 147 87B2-8780 770-773 



Regd. JNos. 5 (Types of the species) : -^- : -y- : - : J( . : 



2332-2337 2607-2608 

 ~10 : 10 ' 



19. Munida tricarinata, Alcock. 



ilunida tricarinata, Alcock, Ann. Mag. Nat. Hist., April 1894, p. 324. 



ILLUSTRATIONS OF THE ZOOLOGY OF THE INVESTIGATOR, CECSTACKA, PLATE XII. FIG. 1. 



Belonging to the group Munida granulata, scabra, and proxima, Henderson, 

 and Munida obesa, Faxon. 



The length of the carapace and the greatest breadth are equal. The entire 

 carapace is covered with spinelets arranged in longitudinal and transverse rows. 

 The rostrum is less than one-fourth the length of the rest of the carapace and 

 not very much longer than the supraorbital spines ; it is continued backwards to 

 the after border of the carapace, first as a sharply spinulate carination of the 

 front half of the gastric region, then as a row of 3 close-set spines traversing the 

 posterior half of the gastric region, then as a row of 3 more distant spines 

 traversing the cardiac region, and terminates as a large spine on the posterior 

 margin of the carapace. On either side of this rostral series of spines the orbital 

 spine also is continued backwards as a gently divergent series of rather smaller 

 spines, so that the carapace is longitudinally traversed by three sharply spinate 

 carina?. The anterior margin on either side of the rostrum is concave, without any 

 obliquity ; the posterior margin is raised and closely spinate throughout ; on the 

 lateral margins the spinature is hardly to be distinguished from the general 

 spinature of the surface, the antero -lateral spine alone being large. 



Abdominal terga with the transverse and concentric ridges well developed ; 

 the first tergum is remarkably broadly exposed and has the entire surface sharply 

 rugose ; the second and third have their anterior edge and their principal trans- 

 verse ridge spinate, two of the spines in every case, namely, those on either side 

 of the middle line, being large ; the fourth has the anterior edge only armed in 

 an exactly similar manner. 



