
34 RECORDS OF THE S.A. MUSEUM 
11. First antenna 8-segmented in female, 11- or 12-sogmented in male; distal segment of fourth 
endopod the longest 24 is a as wt aia 04 
First antenna 9-segmented in female; proximal segment of fourth endopod the longest 
9 serratipes sp. nov. 
12. Caudal rami longer than wide 23 as 3 Q chelifer Giesbrecht 1895. 
Caudal rami as wide as long .. +4 d ovatus sp. nov. 
18. First antenna 10-segmented in female, 12-segmented in male ¢ 9 siphonatus Giesbrecht 1895. 
First antenna 9-segmented in female, 11-segmented in male... 3 inermis sp. nov. 
BRADYPONTIUS INERMIS Sp. nov. 
Occurrence. IX, 2 females; X, 4 females (1 ovigerous), 1 male, 3 juveniles; 
XI, 17 females; XII, 1 juvenile ?; XIII, 4 females (2 ovigerous). 
Female, Length 1:11-1:50 mm. The body is wide anteriorly, its greatest 
width being about three-fifths of the total length; the head segment is as wide as 
long. The first antenna is composed of nine distinct segments, the second to 
seventh and ninth and tenth being fused; the second segment is partially sepa- 
rated in some specimens and entirely free in others ; when it is free, then the eighth 
segment is fused with the preceding segment so that the total number is always 
nine. The second antenna has a small exopod bearing two small setae. The 
siphon extends beyond the posterior margin of the head segment. The maxillule 
has the outer lobe armed with one spine and a thin seta, and the inner lobe has 
a single long delicate seta; the maxilla and maxilliped are without specific charac- 
teristics. The swimming legs have the following seta formula: 
endopod, exopod. 
pl 1.2.320. 1,1.323. 
p.2 1,2.321. 11.423. 
p.3 1.2.321. 1,1.423. 
p.4 0.0.010. 1.1.423. 
As is usual in this genus in preserved specimens the swimming legs are found 
with the rami bent forwards and inwards so that they tend to overlap when 
mounted. The second leg, which has been figured, has been drawn with the rami 
artificially separated. The fifth leg is composed of a rounded knob, bearing two 
setae. The caudal rami are wider than long and about half the length of the 
anal seement. 
Male. Length 1:07 mm. The body is more slender than that of the female, 
the width of the head being only three-fourths of its length. The first antenna 
has eleven distinct segments, the third to sixth being fused; the ninth segment is 
elongate and bears a distal hook, while the terminal segment is bent upon the 
tenth segment and bears a long stout sensory filament. Segments two to nine 
bear a large number of very thin sensory filaments, little thicker than an ordinary 
seta. These are very long and only a few have been shown in the figure; the 
impression gained from an examination of the whole animal is that the antennae 
are clothed with a brush of dense setae. 
Giesbrecht (1899, p. 29) states that the males in both chelifer and siphonatus 
have a large number of long thin sensory filaments one on each free and fused 
segment from two to twelve (eighth segment excepted in chelifer) and two on 
each from thirteen to sixteen. In this species the distribution is from segments 
two to nine (distinet segments) but the proximal ones overlie the points of at- 
tachment of the more distal ones so as partially to hide the points of insertion. 
There are between sixty and seventy altogether. 
The second antenna bears a lateral seta on the end segment, not found in 
the female (possibly broken off) and the maxilliped shows the modification of 
the basal portion found in the male of siphonatus. 
