7 
by Rev. T. R. R. Stebbing. 27 
Ruyncwocrneres typus, Milne-Edwards. Plate VI. 
1837. Rhynchocinetes typus, Milne-Edwards, Ann. Sci. Nat., ser. 2, 
vol. vii, p. 165, pl. 4. 
1837. &. ¢., Milne-Edwards, Hist. Nat. Crust., vol. ii, p. 383. 
1849. £.t., Nicolet, Hist. Chile. Zool., vol. iii, p. 216, atlas, pl. 1, 
figs. 7, 7 a-d. 
1852. Rhynchocinetes typicus, Dana, U.S. Expl. Exp., vol. xiii, p. 
568, pl. 36, figs. 7 a—d. 
1871. Rhynchocinetes typus, Cunningham, Tr. Linn. Soc. London, 
vol. xxvii, p. 497. : 
WONG.) 2.0. Miers), Catal. Crust N: Zi, p. it: 
1882. #. t., Haswell, Catal. Austral. Crust., p. 180. 
1890. £&. ¢t., Ortmann, Zool. Jahrb., vol. v, p. 507, pl. 37, fig. 7d, f-. 
1909. AR. t., McCulloch and Rathbun, Rec. Austral. Mus., vol. vii, 
py 312. 
1910. #. ¢., Rathbun, Pr. U.S. Mus., vol. xxxviii, p. 562, pl. 52, fig. 2. 
Cunningham remarks of this species that ‘“‘it is an exceedingly 
beautiful creature when alive, the body and legs being elegantly 
mottled and banded with various shades of red and brown.” This 
is in agreement with Nicolet’s account of the colour, and with the 
African specimens. Of Stimpson’s A. rugulosws, McCulloch says 
“it is very beautifully marked when alive with streaks and dots of a 
bright blue colour on a darker ground.” In spirit the difference of 
hue would cease to be distinctive, but 2. typus seems to have none 
of that rugosity on which Stimpson relied in instituting his species. 
Miers, therefore, is not likely, as McCulloch supposes, to have confused 
the two species. In dealing, however, with the specific differences in 
this genus there are some pitfalls. Thus Dana says ‘‘it is important 
to observe, that the external maxillipeds are very much more elongate 
in the male than in the female, being in the former as long as the 
body.” So also in the two specimens from Durban, the uropods of the 
larger specimen are decidedly longer than the telson, whereas this is 
not the case in the smaller. Also in the smaller, the second perzeopod 
reaches beyond the first, while in the larger the reverse is the case. 
As will be seen by the figures, the first pereeopods differ much in the 
two specimens, although in their striking colour pattern they were an 
excellent match. 
Mr. Bell Marley found this strongly humped species on sociable 
terms with Leander affinis and Stenopus hispidus, among stones likely 
to protect it from predaceous fishes but not from marauding crabs. 
