334 A. E. Verrill Decapod Crustacea of Bermuda. 



Percnon planissimum (Herbsti. M. J. Rathbnn. r/t Crab. 



Cam-,;- planissimus Herbst, Natnrh. Kial.l... p. 3, pi. lix. fin. 1-'l 

 Acanthopus planissimus Siimpeon, op. cit., p. U>1 | >'.' |, I860; Orusl 

 Pacific Expl. Exp., Smithsonian Mis.-. Coll.. xlix. p. 1 -':'.. !*;<' (l'-M)7i. (descr. 



colors) Bonin Is. 



AcavfhojniN <;il>l.,-*ii Milne-Eclw.. M.I Can-in . p. 1 Hi. 

 Leiolophus planissimus Miers, Catal. Crust. NT. /.Miami, p. Mi. IsTd. 

 Percnon planissimum Rathlmn, Dec. Crust. W. Africa, Proc. U.S. Nat. M..... 



xxii. p. 2S1. 111(10; P.ra.-li. and Ma.-r. L'.irto Hi.-... p. 111. 1901. \Yrrill. 



these Trans., vol x, p. 575, 1900. 



PLATE X. FIGURE 3. PLATE XII. FIGUHK I 



Easily rec-oo-ni/.able on account of its very flat, smooth lody, and 

 the slits in the front and in the eye-sockets. Its structure is admira- 

 bly adapted to its hal.it of living in tin- confined spaces under stones. 

 In life the carapace is usually variegated or mottled with brown, 

 pinkish flesh-color and salmon : there is gun-rally a median longitu- 

 dinal stripe of bright pale blue; the legs are hund.-.l with reddish 

 brown and li-'ht pink. Ventral side of body pale blue ; of legs 

 pale pink (C. S. V.). 



One female taken in April, 1901, carried eggs ; also one taken in 

 midsummer, by Prof. Kim-aid. 



.l/.'<(.siHVi/ic.i/N nf 11,-i-ininlil N/II-C/HICKS. 



Carapace Front Cheht 



Number Sex length breadth width length height 



30 3 



3005 $ 



3005a S 



S 

 Figured 



The chelse are feeble in the females but large in the males. In the 

 males the two are unequal; the large chela has a large and long tuft 

 of soft hairs on inside of merns. 



It was found very commonly by us in 1898 and 1901, on many 

 rocky shores under stones at about low-tide level. It was in the 

 collections of J. M. Jones ; G. Brown Goode ; Prof. Kincaid, 1903 ; 

 Field Museum E.vped., 1905 ; Bermuda Biological Station, 1903, and 

 others. 



It is widely distributed throughout the West Indies to Brazil. 

 Azores : Spain ; Madeira ; West Africa and South Africa ; Mauri- 

 tius to Japan, and Hawaiian Is., Bonin Is. Cape St. Lucas to Chili 

 (Rathbun). Colon (Yale Mus.). 



