REPORT ON THE BRACHYURA. 291 
In the nearly allied genus Platymera, Milne Edwards, the carapace is much more 
transverse, and the lateral spine very greatly developed, but in this genus the merus of 
the exterior maxillipedes is distally truncated, deeply notched on the inner margin, with 
a tooth or lobe at the antero-internal angle, above the point of articulation with the next 
joint, somewhat as in Cryptosoma. 
Mursia cristimana. 
Alursia mains en Crete, Desmarest, Consid. sur les Crust., pi. ix. fig. 3, 1825. 
Mursia cristata, Milne Edwards, Hist. Nat. Crust., vol. ii. p. 109, 1837 ; Crust, in Cuvier, 
Regne Animal, ed. 3, pi. xiii. fig. 1. 
„ „ Studer, Abliandl. d. k. Akad. d. Wiss. Berlin, p. 15, 1882 ; not Murcia 
cristata, Leach, in Coll. Brit. Mus. 
“ Mursia cristimana, Latreille,” de Haan, Crust, in v. Siebold, Fauna Japonica, pp. 70, 73, 1837. 
„ ,, Ivrauss, Die siid-afrikanischen Crust., p. 52, 1843. 
Cryptosoma orientis, Adams and "White, Crust, in Zool. H.M.S. “ Samarang,” p. 62, pi. xiii. 
fig. 4, 1848 var. (?). 
Cape of Good Hope, Simon’s Bay (an adult male); Sea Point, near Cape Town (an 
adult female); Agulhas Bank, in 150 fathoms, in lat. 35° 4' 0" S., long. 18° 3 7' 0" E., 
Station 142 (a male and two females). 
The adult male from Simon’s Bay is without chelipedes, and presents the following 
dimensions : — 
Adult . 
Lines. 
Millims. 
Length of carapace, .... 
13 
27-5 
Breadth of carapace, at base of lateral spines, . 
141 
31 
Length of second ambulatory leg, 
221 
47-5 
Cryptosoma, orientis of Adams and White differs in nothing but in the slightly 
broader front, with somewhat less prominent median tooth, and the somewhat straighter 
posterior margin of the carapace, and is probably only a variety of Mursia cristimana. 
Mursia curtispina, n. sp. (PL XXI Y. fig. 2). 
.This new species so nearly resembles in all its characters Mursia armata, de Haan 
( Thealia acanthopora, Lucas), that the detailed description which follows is scarcely 
needed ; it is distinguished, however, by the somewhat narrower carapace, which has the 
antero-lateral margins more arcuated, and is armed with proportionately shorter lateral 
spines, and with three very small equal tubercles on the posterior margin, in place of 
the two larger prominences of Mursia armata. The front also is somewhat broader, 
with a smaller, less prominent median cusp. 
The carapace, as in Mursia armata, is transverse, convex, and granulated ; the 
