-I 
Or 
by Rev. T. R. R. Stebbing. 2 
Genus GNATHOPHYLLUM, Latrielle. 
1819. Gnathophyllum, Latrielle, Nouv. Dict. Hist. Nat., ed, 2, vol. 
xxx, p. 72 (Rathbun). 
1901. G., Rathbun, U.S. Fish Comm. Bull. for 1900, p. 126. 
Desmarest in his Consid. gén. Crust., p. 228, 1825, includes in the 
definition of the genus the curious misstatement that the nippers of 
the second pair are more slender as well as much longer than those of 
the first pair. Miss Rathbun notes the misspelling Gnatophyllum in 
Latrielle’s original account. The misprint is ignored by Desmarest 
and by Latrielle in Cuvier’s Régne Anim., ed. 2, vol. iv, p. 96, 1829. 
But Milne Edwards in Hist. Nat. Crust., vol. ii, p. 369, 1837, 
wrongfully quotes Latrielle’s last named work as responsible for 
Gnatophyllum elegans. 
GNATHOPHYLLUM AMERICANUS, Guerin. 
1857. Gnathophyllum americanum, Guérin, in Sagra’s Hist. Cuba, 
vol. 2, p. xx; Atlas, viii, pl. ii, fig. 14 (Rathbun). 
Miss Rathbun (loc. cit.) includes in the synonymy G. fasciolatum, 
Stimpson, 1860; G. zebra, Richters, 1880, and with, I think, needless 
hesitation G. pallidum, Ortmann, 1890. Mr. H. W. Bell Marley’s 
specimen, taken from under rocks, at Bluff, Natal, is described by him 
as running on the ground with claws extended, making no attempt to 
swim ; ‘colour white mixed with brown, chelipeds white with a broad 
band of brown bordered with lemon-yellow, tail white with two yellow 
bands.” It measures about 13 mm. in length, and as far as could be 
determined, without dissection, has six teeth to the rostrum. The 
eyes have the ‘‘conical obtuse protuberance, pigmented with black, 
arising from upper part of cornea,” as described by Miss Rathbun. 
G. panamense, Faxon, 1895, has this protuberance similarly described, 
but the colouring of that species differs remarkably from ours. — G. 
tridens, Nobili, 1906, has only three teeth on the rostrum, but the 
dentation of the rostrum is variable, and therefore not a very trust- 
worthy character. 
