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Crustacean Fauna of South Africa. 
species Talitrus sylvaticus Haswell and T. kershawi Sayce, both of 
which possess a 5th side-plate of the same character as Talitriator. In 
addition they have the palp of maxilliped 4-jointed, telson longer than 
broad, a triangularly expanded 5th joint in Ist gnathopod, and the Ist 
antenna only slightly shorter than the peduncle of 2nd antenna. 
It seems therefore expedient to transfer the two Australian species 
to the present genus, which may be defined as follows : 
Like Talitrus, but with anterior lobe of 5th side-plate much larger 
than the posterior lobe, 1st antenna only slightly shorter than peduncle 
of 2nd antenna, palp of mavxilliped 4-jointed, Ist gnathopod not so 
long as 2nd gnathopod and not stronger, 5th joint of Ist gnathopod 
distally expanded, 2nd joint of 3rd peraeopod moderately or scarcely 
at all expanded, telson longer than broad. Genotype: 1’. eastwoodae 
Methuen. Includes also T. sylvaticus (Haswell) and 7. kershawi 
(Sayce). 
There is, however, one feature which separates 7’. eastwoodae from 
both Talitrus and also the two Australian species and to which Methuen 
has not drawn attention: namely, the subacute projection on the upper 
posterior angle of the 2nd side-plate. 
TALITRIATOR EASTWOODAE Methuen. 
1913. Taliatriator eastwoodae Methuen, l.c. p. 110, pls. 10, 11. 
IT have examined 4 specimens from the original locality in the 
Transvaal, kindly presented to the South African Museum by Hon. 
P. A. Methuen and labelled by him as “Types.” I find that the 
postero-inferior angles of pleon segments 2 and 3 are not quite so 
produced as in Methuen’s figure (pl. 11, fig. 12), in fact there is no 
produced point on the 2nd at all in two of the specimens. The 2nd 
antenna reaches to the end of the 3rd peraeon segment. 
There is also in the Museum a considerable number of specimens 
from the Cape Peninsula and other districts, all of which I consider 
to be specifically the same as eastwoodae. I have also come to the 
conclusion that Methuen’s specimens were probably not quite mature. 
Needless to say the specimens show a certain amount of variability, 
not, however, very great. The size of the adults also varies a little. 
The largest specimens measure 16 mm., and in these the 2nd 
antenna reaches to the 4th-6th peraeon segment, its flagellum 24—28- 
jointed, that of 1st antenna 6-8-jointed, 5th and 6th joints of Ist 
gnathopod more elongate than in the Type specimens, the process of 
the 6th joint of 2nd gnathopod longer and more pointed and curved 
upwards, the upper margin being concave. 
