202 Annals of the South African Museum. 
subacute points bearing 2-3 minute setules, inner margin of inner, and 
outer margin of outer ramus with 3 small spines. 
Length: Up to 17 mm. 
Colour: Uniform pink, rarely claret, eyes black. 
Locality: Sea Point, near Cape Town. 29/11/18. (K.H.B.) ¢o 
and ovigerous ? 9 amongst the roots of Ecklonia growing on rocks 
at low water; Woodstock beach, Cape Town. 19/6/14. (K.H.B.) 
(S.A.M. Nos. A2889 and A2890.) 
The specimens from Saldanha Bay, referred by Chilton to Maera 
mastersii, seem to belong to this species. Chilton notes their re- 
semblance to an Hlasmopus. 
Gen. GAMMARUS Fabricius. 
1775. Gammarus (part) Fabricius, Syst. Ent. p. 418. 
1906. - Stebbing, Das Tierreich, 21, pp. 460, 733. 
1909. re G. Smith, Tr. Linn. Soc. Lond. ser. 2, vol. 11, pt. 4, 
p46: 
1910. ms Kunkel, Tr. Conn. Ac. vol. 16, p. 59. 
1912. 4 Sexton, Proc. Zool. Soc. Lond. 1912, p. 657. 
LOTS: r Pearse, Proc. U.S. Nat. Mus. vol. 45, p. 571. 
The only Gammarus hitherto recorded from South Africa is the 
European and Indian G. pulez. Krauss mentions that it was found 
in brackish water, and on this account Stebbing (Gen. Cat. S.A. Crust. 
p. 456) regards the correctness of the identification as very doubtful. 
No mention of the occurrence of the genus in South Africa has since 
been made. 
The following 4 species are all found within the Cape Peninsula, 
and the differentiation is probably the result of long isolation. Up 
to the present no specimens have been collected in other districts (if we 
except Krauss’ specimens), but it is probable that they will be when a 
proper search is instituted. 
The 4 South African species fall into two sharply marked divisions : 
1. With the 4th side-plate with a posterior produced angle and the 
margin above concave, as in the Northern species ; and 2. With the 
4th side-plate subrectangular and similar to the preceding side-plates. 
This latter form of side-plate 4 is unknown among the representatives 
from the Northern hemisphere, but it is noteworthy that among the 
Australasian species of the genus there is one belonging to the second 
sroup, namely, G. ripensis Smith 1909, from Tasmania. 
