
18 RECORDS OF THE S.A. MUSEUM 
have postero-lateral projections, similar to those of the thoracic segments. The 
caudal rami are about. twice as long as wide, and half as long again as the anal 
segment. 
The first antenna is 21-segmented, having the sensory filament on the eight- 
eenth; the second antenna is 4-sezmented, with a 2-sezmented exopod attached to 
the outer distal margin of the second segment. The oral cone is wide basally, 
tapering gradually, stoutly constructed and reaches only to the base of the first 
legs. The mandible palp is thin and as lone as the siphon. The maxillule has 
a small outer lobe, bearing three short setae, and a long inner lobe also with three 
setae, which are long. The maxilla and maxilliped are of comparatively slender 
structure. The swimming legs are strongly built, and all of the same general 
structure. Seta formula: 
endopod. exopod, 
p.1. 1.2.321. 1,1.323. 
p.2. 12.321, 1,1.423. 
p.3. 1,2.321. 1.1.423, 
p.-4. 1,2.221, 1,1.423. 
Of these, in addition to the outer spines of the exopods, the outer terminal 
appendage of the exopod in all legs, and the inner terminal appendage of the 
third and fourth endopods is a spine. There are no spines on the first and second 
endopods. The fifth legs are one-segmented appendages bearing two terminal 
setae; the basal segment is fused with the fifth segment and bears one seta. The 
caudal rami each bear one distal lateral seta. one dorsal and three terminal setae. 
Male. Length 1:02 mm. This differs from the female in a few characters. 
The urosome is 5-segmented ; the genital segment is rectangular in shape and this 
and the three following segments have postero-lateral projections. The anal seg- 
ment is relatively slightly shorter than that of the female. The first antenna is 
17-segmented, the last three segments being fused. In addition to the large sub- 
terminal sensory filament there are a few more slender filaments attached one to 
each of segments 1, 2, 8, 9,10, 11 and 12. The maxilla and maxilliped are more 
slender than in the female, The armature of the swimming legs is identical with 
that of the female; the fifth legs are similar but smaller, and sixth legs are pre- 
sent as small knobs on the posterior margins of the genital segment. 
Genus ScorrocHerres Giesbrecht. 
Giesbrecht, 1897, p. 18; Sars, 1915, p. 106. 
The genus was established by Giesbrecht. for a species wrongly assigned to 
Acontiophorus by T. & A. Scott (1894: A. elongatus) ; at the same time he de- 
scribed a second species, 8. longifurca. In 1902 he described 8S. stylifer; a fourth 
species, S. gracilis, being subsequently described by Hansen (1923). 
ScoTTocHERES LATUS sp. nov. 
Occurrence. IX, 1 female. 
Female. Length 0-91 mm. The body is very rounded anteriorly, its width 
being nearly equal to the length of the head and first free segment together. The 
urosome is 3-segmented, the genital segment forming half of the total length of 
the urosome and is slightly expanded anteriorly, without lateral teeth, but has a 
bunch of setae on each side distal to the centre; the second and third segments 
are sub-equal. The caudal rami are subrectangular and about half of the anal 
segment. 
The first antenna is 19-segmented, distinctly divided into two regions, the 
proximal 9-segmented portion having short, wide segments, the distal portion 
