30 Bulletin Vanderbilt Marine Museum, Vol. VI 



The chelipeds are conspicuously unequal, as figured (Plate 

 5) ; the larger cheliped has the merus trigonal, with the inner, 

 inferior lateral margin coarsely serrate ; the carpus with the upper 

 surface and inner lateral margin spinose ; the palm is high, swol- 

 len, with the upper margin spinose in two or three close-set series 

 and with two additional longitudinal rows, the lower one of which 

 terminates between the base of the fingers ; the lower half of the 

 palm is smooth, except for the coarse denticles of the lower margin. 

 The fingers are stubby, the upper one with three rows of denticles 

 on the outer and upper surface ; the lower finger smooth, except 

 along the lower margin ; the teeth are both contiguous, low, blunt- 

 ly serrulate. The smaller cheliped extends only to the base of the 

 dactyl of the second pair of legs, is ornamented with series of 

 spines similar to those of the larger cheliped, in addition to which 

 the smaller cheliped has numerous tufts of setae. The fingers are 

 as long as the palm, meeting, with corneous black tips. 



The right and left legs of the first and second pairs are sub- 

 equal on opposite sides, the second pair of ambulatory legs ex- 

 ceeding the first pair in length by about one-fifth of the length of 

 the dactyl. The meral, carpal, and propodal joints are compressed, 

 the dorsal surface roughened with obscure denticles, except two or 

 three coarse ones at the distal end of the carpus ; the dactyli are 

 long, curved, sharp-tipped, beset with numerous tufts of setae. 

 The dactyl of the second leg on the left side is distinguished from 

 the others by having a deep longitudinal groove, accentuated by 

 a median longitudinal ridge and with the upper margin serrulate. 

 References : Pagurus deformis, Edwards, H. M., Ann. Sci. Nat. 

 Zool., ser. 2, vol. VI, 1836, p. 272, pi. 13, fig. 4; Ibid., ser. 3-c, 

 t. X, 1848, p. 60 ; Hist. Nat. Crust., t. II, 1837, p. 222.— Ran- 

 dall, J., Proc. Phila. Acad. Nat. Sci., vol. VIII, 1839, issued 

 1840, p. 133.— Stimpson, W., Proc. Phila. Acad. Nat. Sci., 

 vol. X, 1858, issued 1859, p. 246.— Edward, A. M., in Mail- 

 lard, L. L'ile Reunion, Annexe F, 1862, p. 13.— Heller, C, 

 Reise Osterreich. Fregatte "Novara," Zool., Crust., Th. II, 

 Abth. Ill, 1865, p. 86.— MiERS, E. J., Zool. Voy. H. M. S. 

 "Erebus" and "Terror," Crust., 1875, p. 3, pi. 2, fig. 3.— 

 HiLGENDORF, F., S. B. Ges. Nat. Fr. Berlin, 1878, p. 186 (dis- 

 cusses hermaphroditism) ; Montasb. K. Akad. Berlin, 1878, 

 p. 818, pi. 3, figs. 6, 7.— RiCHTERS, F., in Mobius, Beitr. Mee- 

 resfaun. Mauritius und Seychellen, 1880, p. 160.— Lenz 



