234 Annals of the South African Museum. 
2 ¢ &,1 nonovigerous 2. (S.A.M. No. A2470.) In weed at low- 
water. 
Very like the northern H. prevostii (M. Edw.), but distinguished by 
the serrate hind margin of 2nd joint of peraeopods 3-5 and the more 
numerous spines on hind margin of 6th joint of peraeopods 4 and 5. 
Chevreux (1900, Rés. Camp. Monaco, vol. 16, pl. 1, fig. 3f) has 
figured the 5th peraeopod of an Azores specimen of H. prevostii with 
a serrate hind margin to the 2nd joint and a smooth hind margin to 
the 6th joint. Della Valle and Sars figure both joints with smooth 
hind margins. 
HYALE HIRTIPALMA (Dana). 
1852. Allorchestes hirtipalma Dana, Pr. Amer. Ac. vol. 2, p. 205. 
1853/55. ,, A id. U.S. Expl. Exp. vol. 13, 2, p. 888, pl. 60, 
fig. 4. 
1862. .; inca Bate, Cat. Amphip. Brit. Mus. p. 40, pl. 6, fig. 7. 
1879. Nicaea fimbriata Thomson, Tr. N.Z. Inst. vol. 11, p. 236, pl. 10z,. 
fig. 2. 
1888. Allorchestes georgianus Pfeffer, Jahrb, Wiss. Anst. Hamb. vol. 5, 
p. 77, pl. 1, figs. la—n, 4. 
1906. Hyale hirtipalma Stebbing, Das Tierreich, 21, p. 564. 
1909 - Chilton, Subantarct. Is. N. Zeal. vol. 2, p. 643. 
193. > ;, ms id. Mitt. Naturh. Mus. Hamb. vol. 30, p. 55. 
Chilton includes in the synonymy also H. villosa Smith 1876, and 
H. trigonochir Walker 1908. These form the two extremes ; in the 
former the 6th joint of the 1st gnathopod does not widen to the palm, 
in the latter it widens so much that the palm is at least twice the 
length of the hind margin. 
As Chilton (1909) remarks, this character is indeed variable, but 
appears to be not so much individual as local. Among the Cape 
specimens those from Kalk Bay (False Bay) belong to the form 
villosa, Whereas those from Buffel’s Bay (also in False Bay) and from 
Cape Town in Table Bay have the 6th joint distinctly though not 
strongly widened. Amongst the specimens from each locality there 
can be detected no variation, except that due to age as mentioned by 
Stebbing (1906). 
On the other hand, the variation in the brushes of setules on the 
lower margin of the flagella of the 2nd antennae appears to be more 
individual. In many cases the flagella are practically destitute of 
these brushes. 
