( 30 ) 



female its symmetry is lost by the presence, on one side or other, of a large 

 membranous leaf-like lobe that forms a capacious cup-like brood-pouch. 



The first two pairs of abdominal appendages of the male end in convo- 

 luted plates, the second pair working in the grooves formed by the first pair. 



The telson is quite symmetrical, and lies in the middle line, tucked up 

 against the ventral surface of the abdomen. On either side of it are the 

 quite symmetrical swimmerets of the sixth pair : the basipodite of these has 

 a spine at its posterior angle : both the exopodite and endopodite are narrow, 

 slender and falciform, with the anterior edge serrated and the tip spiniform : 

 the exopodite is many times larger than the endopodite. 



The animal does not inhabit a shell, but is protected by a soft fleshy 

 coenosarc of a colony of Actiniarian polyps. This forms a sort of sheet or 

 blanket, one end of which is tucked round the telson of the crab and is 

 firmly held by the hook-like swimmerets of the 6th abdominal somite and by 

 the folded-in telson, while the corners of the other end are firmly grasped by 

 the chelae of the penultimate thoracic appendages in such a way that the 

 sheet can be drawn right over the back of the crab as far as the eyes. 



The colour of the crab is red : the coenosarc of the polyp-colony is 

 bluish, the polyps themselves are dark purple. 



A large male, lying in the natural position with the telson bent under, 

 measures, from the tip of the rostrum, 63 millim.; and the cheiipeds of the 

 same individual, measured along their convex curve, are 58 millim. in 

 length. 



An egg-laden female, measured in the same way, is 37 millim. long and 

 has cheiipeds 35 millim. long. 



3534-3537 3169-3189 ^„ „ -, . .„^ r , . • 

 TTT , rr . Off Cape Comorin, 102 fathoms. "Investigator. 



4659—60 

 — TTi . Gulf of Martaban, 90 fathoms. " Investigator." 



Distribution : Philippines (Tablas I.), 100 — 115 fath., and as above. 



Paguristes, Dana. 



Pagimstes, Dana, Proc. Acad. Nat. Sci. Philad. (1851), 1852, p. 269, and U.-S. Expl. 

 Exp. Crust., pt. I, p. 436, 1852: Stimpson, Proc. Ac. Nat. Sci. Philad. (1858). 1859, p. 235 : 

 Heller, Crust, sudl. Europ., 1863, p. 172: Boas, Vid. Selsk. Skr., 6 Rrekke, nat. o. math. I, 

 2, 1880, p. 189: Henderson, Challenger Anomura, 1888, p. 77: Milne Edwards & Bouvier, 

 Mem. Mus. Comp. Zool. Harvard, XIV. 3,1893, p. 32; Ortmann in Bronn's Thier-Reich, 

 Malacostraca, p. 1146: Thomson, Trans. N. Z. Inst., 1898, p. 186: Holmes, Occas. Papers 

 Calif. Acad. Sci., VII., 1900, p. 151: Young, Stalk-eyed Crust. W. I., p. 376; Benedict, Bull. 

 U. S. Fish. Comm. XX, 2, p. 143, 



