46 STALK- AND SESSILE-EYED CRUSTACEA 
This species is found at the Cape of Good Hope, Australia, and 
Chili. 
LEIOLOPHUS. 
Plagusia, M. Edw. (part) Hist. Nat. Crust. 1, p. 90, (1837). 
Acanthopus, De Haan, Faun, Japon, Crust. p. 29, (1835), nom. usit. 
Carapace with the front and lateral margins spinous toothed, very 
greatly flattened (even more than in Plagusia), External maxillipeds 
with the third joimt oblong, much narrower than the second at the 
summit. Anterior legs in the male with the hand smooth, very much 
expanded and compressed. J 
As the name Acanthopus has been more than once preoccupied in 
Entomology, I propose to designate this genus Levolophus, in allusion to 
the smooth elevated limes or ridges with which the carapace and 
ambulatory legs are usually marked. 
51. Leiolophus planissimus. 
Cancer planissimus, Herbst, Krabben iii, p. 3, pl. lix, fig. 3, (1799). 
Plagusia clavimana, Latr. Gen. Crust. et Ins. i p. 34, (1806) ; 
Edw. Hist. Nat. Crust. u, p. 92, (11837) ; Reene Animal de Cuv. 
pl. xxiii, fig. 3; White, Dieffenb. New Zealand ii, p. 266, (1843). 
Plagusia serripes, Lam. Hist. An, sans Vert. p. 247, (1818). 
Acanthopus planissimus, Dana, U.S. Explor. Exped. xii, Crust. 
part i, p. 3872, (1852). 
Front very narrow, much longer than wide, and ending in two small 
spines. Body very much flattened. Carapace much longer than wide, 
pubescent. Front margin of the epistome with a spine, which projects 
beneath the front. Anterior legs short, hands greatly expanded. 
Ambulatory legs very long, with the upper margin armed with teeth 
throughout nearly their whole length, the third pair the longest of all, 
being twice the length of the carapace., Antepenultimate joint of the 
abdomen coalescing with the preceding joint in both sexes. Length 
2in.; breadth 3in. (M. EF). 
New Zealand (Mus. Paris). 
ZL, planissinus is found on the coasts of Australia and the Philip- 
pines, throughout the islands of the Pacific, at Chih, and California, 
and at Madeira, Probably the West Indian form, separated by M, 
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