58 Some Crustacea of Natal 
MACRURA ANOMALA. 
Trine GALATHEIDEA. 
Famity, PORCELLANID A. 
Genus PETROLISTHES, Stimpson. 
1858. Petrolisthes, Stimpson, Pr. Ac. Philad., vol. x, p. 227 (65). 
1907. P., Nobili, Ann. Sci. Nat., ser. 9, zool., vol. iv, p. 129. 
1907. P., Stimpson, Smithson. Mise. Collections, vol. xlix, p. 181. 
PETROLISTHES SPECIOSUS (Dana). 
1852. Porcellana speciosa, Dana, U.S. Expl. Exp., vol. xiii, p. 417, 
pl. 26, fig. 8. 
1858. Petrolisthes speciosus, Stimpson. Pr. Ac. Philad., vol. x, pp. 
227, 241 (79). 
1907. P.s., Stimpson, Smithson. Mise. Collections, vol. xlix, p. 182, 
pl. 22, fig. 2 (facing p. 184). 
Dana writes of this species as having ‘hand minute granulous, 
naked,” but also as having the hands ‘“ granulous on both surfaces.” 
In the Natal specimen the inner side is covered with squamose 
markings and the outer is conspicuous for a longitudinal ridge; the 
carpus has several teeth along both margins. The colour is in general 
agreement with Dana’s figure, but with a beautifully symmetrical 
pattern on the carapace. 
Locality: From the sponge Cerao chalinus, taken by Mr. Bell 
Marley, on rocks, Vetch’s pier, Durban. 
From the same sponge occurred a male specimen of Porcel/ana 
dehaanii, Krauss. 
