122 SMITHSONIAN MISCULLANKOUS COLLECTIONS 



Genus PLAGUSIA Latreille 



199. PLAGUSIA TOMENTOSA' Milne Edwards 



Cancer chahrns Linn^us, Syst. Nat, 1044 {Me White). 



Plagusia tomentosa Milne Edwards, Hist. Nat. des Crust., 11, 92. Mc- 



LEay, in Smith's Illust. Z06I. S. Afr., Annulosa, p. 66. Dana, U. S. 



Expl. Exped., Crust., i, 370. 

 Plagusia capensis De Haan, Fauna Jap., Crust., p. 58. 

 Plagusia chabrus White, Cat. Brit. Mus., 1847, p. 42. 



White refers this species, perhaps justly, to the Cancer chabrus of 

 Linnaeus. But the identification does not appear to rest upon com- 

 parison of the original specimens, and until this is made we prefer 

 to use a name to which we can refer with certainty. 



It is rather common about the rocks at half-tide in Simon's Bay, 

 Cape of Good Hope. 



200. PLAGUSIA DENTIPES De Haan 



Plagusia dentipes De Haan, Fauna Japonica, Crustacea, p. 58, pi. viii, 

 fig. I. Milne Edwards, Melanges Carcinologiques, p. 144. 



Young specimens, probably of this species, were taken at Simoda. 



201. PLAGUSIA SQUAMOSA = (Herbst) Dana 



Cancer squamosus Herbst, Naturg. d. Krabben u. Krebse, i, 260, pi. xx, 



fig. 113- 

 Plagusia squamosa Dana (non M. Edw.), U. S. Expl. Exped., Crust., i, 

 368. 



The Atlantic form differs constantly from the East Indian species 

 usually called Plagusia squamosa in the dentation of the superior 

 lobe or crest of the ischium- joint of the second and third ambulatory 

 feet, which is always armed with two or three teeth. Herbst's figure 

 represents this species, to which we would therefore restrict his 

 name squamosus, notwithstanding that he gives the East Indies as 

 its habitat. 



It is common at Madeira. 



202. PLAGUSIA ORIENTALIS' Stimpson 



^ Plagusia tuberculata Lamarck, An. s. vert, v, 247. 

 Plagusia squamosa Milne Edwards, Hist. Nat. des Crust., 11, 94; Mel. 

 Carcin., 144. 



^Plagusia chabrus (Linnaeus). 

 'Plagusia depressa (Fabricius). 

 ^Plagusia tuberculata Lamarck. 



