REPORT ON THE BRACHYURA. 
211 
Straits of Magellan, at the Falklands, and on the coasts of Chili and Patagonia, in 
shallow water (to 45 fathoms). 
It is nearly allied to A telecyclus, which is found both on the shores of Europe and 
Chili, but is distinguished by its narrower, three-spined front, the spinuliferous, not 
dentated, antero-lateral margins of the carapace, and the shorter, more truncated merus- 
joints of the exterior maxillipedes. 
Hypopeltarium spinosulum (White). 
Atelecyclus spinosulus, "White, Ann. and Mag. Nat. Hist., ser. 1, vol. xii. p. 345, 1843. 
Peltarion spinulosum, White, List Crust. Brit. Mus., p. 52, 1847. 
,, „ Dana, U.S. Explor. Exped., vol. xiii., Crust. 1, p. 304, pi. xviii. fig. 6, 
1852. 
„ „ Cunningham, Trans. Linn. Soc. Lond., vol. xxvii. p. 494, 1871. 
„ „ Miers, Proc. Zool. Soc. Lond., p. 68, 1881. 
Peltarion magellanicus, Jacquinot and Lucas, Crust, in Voy. au Pole Slid. Zool., vol. iii. p. 83, 
pi. viii. fig. 1, 1853. 
Off the coast of Chiloe, 45 fathoms, Station 304 (a small male) ; Port Stanley, 
Falklands (a fine male taken in the trawl) ; near the same locality, 5 to 12 fathoms, 
Station 315 (five males and a female) ; Station 316, 4 to 5 fathoms (a small male). 
Adult $ . Lines. Millims. 
Length of carapace, and breadth, about .... 22J 47 
Gomeza, Gray. 
Gomeza, Gray, ZooL Miscell., p. 39, 1831. 
OEidea, de Haan (subgenus, in part), Crust, in v. Siebold, Fauna Japonica, p. 15, 1833. 
Carapace elongated, dorsally convex, and granulated, with the lateral margins rounded 
and armed with teeth or spines along their whole length ; the front is narrow, compressed, 
laminated; it projects over the bases of the antennules, and is emarginate or biemarginate 
at the distal extremity. The orbits are small, and are armed with a prominent tooth or 
spine at their interior angle, and with a smaller spinuliferous lobe at the interior sub- 
ocular augle. The epistoma is distinct and transverse. The longitudinal ridges of the 
endostome are developed, but do not reach the anterior margin of the buccal cavity. 
The post-abdomen of the male is five to seven-jointed. The eyes are short and completely 
retractile within the orbits. The antennules are longitudinally plicated ; the antennae 
terminate in long flagella, sometimes exceeding the body in length, their basal joints are 
moderately dilated and reach the margin of the front, they occupy the space between 
the antennulary fossettes and the orbits from which the antennal flagella are excluded. 
The merus-joints of the endognathi of the exterior maxillipedes are either distallv 
