284 Annals of the South African Museum. 
80 fathoms. 2 ¢ ¢,38 2? 2 ; Robben Island, Table Bay. 1 juv. dg; 
Umkomaas River mouth NW. by W. 3 W., distant 5 miles (Natal). 
40 fathoms. 4 ¢ 4; Walker Point NE. by N. $ N., distant 7 miles 
(off Knysna). 47 fathoms. 1 ? ; s.s. “ Pieter Faure.” 17/3/02, 
28/10/97, 31/12/00, and 11/10/00 respectively. Sea Point, Cape Town. 
96/2/14. 2 $f (K.H.B.) (S.A.M. Nos. A87—-A89, A3860, and 
A2951.) 
Gen. ORTHOPROTELLA Mayer. 
1903. Orthoprotella Mayer, Siboga Exp. vol. 34, p. 35. 
ORTHOPROTELLA MAYERI 0D. Sp. 
1903. Orthoprotella spec. Mayer, l.c. p. 36, pl. 1, figs. 25, 26, pl. 6, 
figs. 43, 44, 46, pl. 9, fig. 15. 
These specimens agree with the form described and figured by 
Mayer, but the largest is more than twice as large as any this author 
saw. Mayer regarded it as a variety of O. australis (Haswell), but 
with a certain hesitation. Seeing that a very good and apparently 
constant distinguishing feature is to be found in the 2nd gnathopod 
of the ¢, and that it inhabits regions as widely separated as Sydney, 
Singapore and South Africa, it seems to merit specific rank. 
One of the specimens (that from Glendower Beacon) has a single 
median spine on the 2nd peraeon segment above the 2nd gnathopods, 
but the rest of the specimens are devoid of dorsal spines or tubercles. 
All have a lateral spine on the 2nd and 8rd segments. Segments 6 and 
7 not fused. 
First antenna with flagellum of 20-30 joints; basal joint of 2nd 
antenna distinctly, and rather slenderly, produced. 
Second gnathopod as figured by Mayer, but the tubercle on the 
anterior margin of hand more prominent and the apical angle more 
produced and acute ; in the largest specimen the shape of the hand is 
more oblong, the inferior margin is distinctly concave and subparallel 
with the anterior margin; the venom-tooth is quite proximal, and there 
is a little notch between it and the inferior margin; inferior margin 
sparingly setose; the two teeth near the hinge would be better described 
as follows: a single triangular tooth with a narrow parallel-sided shit 
cut in the apex and extending nearly to the basal line ; finger moderately 
slender and curved, reaching to the venom-tooth, its inner margin finely 
and regularly crenulate. 
Peraeopods 1 and 2 half the leneth of the branchial lamellae 
1-jointed, narrow, apically setose. 
