48 Some Crustacea of Natal 
BRACHYURA GENUINA. 
TRIBE OX YRRHYNCHA. 
Famity MAMAIID A. 
See Ann. S. Afr. Mus., vol. vi, pt. 4, p. 290, 1910. 
Genus CAMPOSCIA, Leach. 
1829. Camposcia, Leach, in Latreille, Le Regne Animal, vol. iv, 
p. 60. 
1829. C., Guérin, Iconographie du Regne Animal, p. 9, pl. 9, fig. 1. 
1839. C., de Haan, Crust. Japonica, decas quarta, p. 87. 
Camposcia RETUSUS, Latreille. 
1829. Camposcia retuja, Latreille, Le Regne Animal, vol. iv, p. 60. 
1829. C.7., Guérin, Icon. Regne Animal, pl. 9, fig. 1 (retwsa on p. 9). 
1834. C. retusa, Milne Edwards, Hist. Nat. Crust., vol.i, p. 283, 
plo, feeb: 
1839. C. retusus, de Haan, Crust. Japon., pl. li. 
1895. C. retusa, Alcock, Journ. Asiat. Soc. Bengal, vol. lxiv, p. 184. 
1906. C.7., R. D. Laurie, Herdman’s Pearl Fish., Rep. xl, in pt. v, 
p. 371. 
Alcock supplies an ample bibliography and an excellent description 
of this species, ignoring however its original name, retwja, which was 
no doubt due to a misreading of the manuscript label, refu/a. It may 
be noted that the fourth joint of the third maxillipeds, though narrow 
at the base, is expanded distally. The extension of the third joint 
along the inner margin of the fourth is a notable feature. The 
carapace of the female specimen collected by Mr. Bell Marley at 
Durban measures roughly 40 mm. in length by 27 mm. in breadth. 
The pleon is, as described by de Haan, in the last four segments 
widely orbicular. According to Mr. Bell Marley, its coating of dark 
red hairs accumulates a variety of objects, such as seedpods of 
mangroves, so that as it floats about with the tide it looks more like 
a bunch of seaweed than a crab, 
