REPORT ON THE BRACHYURA. 
33 
Adult J. 
Lines. 
Millims. 
Length of carapace to base of rostrum, . . 
7 
15 
Breadth of carapace, nearly .... 
5i 
12 
Length of rostral spine, .... 
H 
7-5 
Length of chelipede, ..... 
10 
21 
Length of first ambulatory leg, about . 
21 
44 
A single adult female was’ dredged at the Philippines, in 375 fathoms, in lat. 
9° 26 ' 0 " N., long. 123° 45' 0" E. (Station 210). 
The right chelipede is unfortunately broken in this specimen. 
Macrodieira / De Haan. 
Macrocheira , De Haan, Crust, in. v. Siebold, Fauna Japonica, dec. 4, p. 89, 1839. 
„ Miers, Journ. Linn. Soc. Bond. (Zool)., vol. xiv. p. 647, 1879. 
Carapace subpyriform, and rather convex, covered with tubercles, which tend to 
become spiniform ; a supraocular and postocular but no prseocular spine. Spines of 
rostrum short and divergent. Post-abdomen (in both sexes) seven -jointed. Eyes 
retractile. The basal antennal joint is short and slender and does not nearly attain the 
front, which is barely reached by the next joint ; the flagella are visible from above at 
the sides of the rostrum. The merus of the exterior maxillipedes is elongated (somewhat 
as in Inachus ) and is articulated with the next joint at the middle of its distal margin, 
which is not truncated. The chelipedes in the adult males are very considerably 
elongated ; the palm subcylindrical, not turgid, and often as long as the merus ; fingers 
straight and acute, and without an intermarginal hiatus at the base. The ambulatory legs 
are considerably elongated, subcylindrical and unarmed, with the dactyli straight and 
shorter than the penultimate joints. 
The unique species of the genus, Macrocheira kdmpferi , De Haan, is, as is well 
known, the largest of the Brachyura, and occurs in the Seas of Japan, to a depth, as the 
Challenger collections show, of 345 fathoms. 
Macrocheira kdmpferi, De Haan. 
Inachus ( Macrocheira ) hampferi, De Haan, Crust, in v. Siebold, Fauna Japonica, p. 100, 
pis. xxv., xxvi.,8; pis. xxvii., xxviii. ?, 1839. 
Japan, off Inosima, in 345 fathoms, lat. 35° 11' 0" N., long. 139° 28' 0" E. 
(Station 232). 
1 This generic name was used in 1838, by Schoenherr, as Macrocheirus, for a genus of Coleoptera. I am loth to 
alter the designation by which this species has been so long known to carcinologists, but, should it be necessary to do 
so, the generic name Kdmpferia, suggested by my friend Mr. A. G. More, F.L.S., of the Museum of Science and 
Art, Dublin, might be conveniently adopted for it. 
(zool. chall. EXP. — PART XLIX. 1886.) 
Ccc 5 
