

22 RecokbDs oF THE S.A, MusEUM 
eudopod, exopod. 
pl. 12.321, 11,323. 
pe. 12,321, 11,418. 
p.3- 1.2.311. 11,818. 
pe. 12,211, 1.1.813. 
The fitth legs are each represented by a well-developed, sub-rectangular segment 
bearing three terminal and two inner marginal setae; there is a simegle seta repre- 
senting the basal segment which is fused with the corresponding body segment. 
The caudal rami are twice as long as wide and a little longer than the anal sey- 
ment and armed with three terminal getae, the innermost of which is short and. 
much more slender than the other two. 
Male, Length 0-87 mm. ‘lhe body is similar to that of the female; (he uro- 
some is 4-segmented with the three posterior segments sub-equal; the caudal rami 
are scareely twice as long as wide. The first antenna is 10-segmented, having the 
third, fourth and fifth segments together scarcely more than half as long as the 
sixth, and the terminal segment distinetly hinged upon the preceding segment. 
Tn the second antenna the exopod extends to beyond the middle of the terminal 
segment, as in the female. There is little else to distinguish this from the female 
and it differs from the male of seutalus by the same features which separated the 
respective females, in addition to which the first antenna has only ten distinct seg- 
ments compared with eleven in scutatus. 
Thomson (1883, p. 115) states that the species tound by him in Otago Bay 
“conforms exactly’’ with Brady’s description of sculalas, which he quotes in 
full. Hansen (1923, p. 11) remarks in this connexion that Thomson is ‘' most 
probably wrong.’’ Hansen would appear to be vorrect here since the species found 
here, while closely resembling scxtatus, differs from it in several respects in each 
of which, where comparison can be made, Thoinson’s figures show a similar dif- 
ference. These differences are: i the first antenna in scvtatus the third, fourth 
and fifth serments together equal the sixth ; in zealandieus the sixth segment is eon- 
siderably greater than these three together; in the second antenna of scutatus the 
exopod does not reach the middle of the terminal segment, whereas in zealandious 
it extends beyond the middle; the eaudal rami are more slender in seutetus 
(leneth/width : 3/1), in zealandieus this ratio is only 2/1. Thomson's figure shows 
the rosome somewhat upturned so that here no comparison can be made. 
In view of these differences it seems probable that Thomson’s specimen is 
identical with the new species deseribed here. 
Famity MYZOPONTIIDAE Sars, 
Sars, 1915, p. 112. 
This family wae constituted by Sars for two genera which Qiesbrecht had 
placed in his Dyspontiinae bit Sars revarded as iitermediale between this group 
and the Asterocheridae. The two genera are distinguished by the condition of 
the oral tube, which is short and not extended into aw siphon in Neopontius, while 
Myzopontius has a well developed siphon, 
Genus Myzovon ius Giesbrecht.. 
Giesbrecht, 1895 ; 1897; 1899; Sars, 1915, p, 118, 
This isa monotypie genus based on Gicsbrecht’s M. pungens. The form found 
here differs in the first antennae and caudal rami and is regarded as a new species, 
MyYZOPONTIUS AUSTRALIS Sp, DOV. 
Occurrence, X11 female. 
Female. Length (+87 mm. ‘The body has the same weneral shape and pro- 
