
390 Recorps oF THe $.A. MUSEUM 
silt (K, Sheard, Oet., 1943). Type in Sontl Australian Museum, Reg. No, O, 2674. 
Onigerous female, B—(robust form), One of the examples from the type 
locality was at first set aside as a species distinct from the above beeause of the 
mare robust carapace, the noticeably shorter first peracopods, and the slightly 
longer exopod of the uropod, The appendages are otherwise close to those of the 
type. 
The carapace is more arched dorsally as seen from the side and is relatively 
wider and deeper, with the sides, as seen from above, more convex. The whole 
frontal lobe is relatively wider. 
In the third maxilliped the basis is a little shorter than in the type and the 
carpus of the first peracopod reaches only to level of antero-lateral angle of 
carapace instead of beyond it, while the basis of this leg is only about half as long 
again as rest of limb, but has the long inner distal tooth as figured, The basis of 
the second peraeopod is relatively a little shorter, but the rest of the limb is 
composed of the unusually short joints as described, The robust distal carpal 
seta of the posterior legs is a trifle longer. 
Uropods are much as in the type, but the exopod ts two-thirds as long as 
endopod, there are three spines on inner edee of peduncle and five on Inner margin 
of first joint of endopod, while the terminal spiues of both rami are considerably 
longer. 
The telson (fig. 22, B) has the post-anal portion a little longer, the lateral 
serrations considerably larger, and the terminal and subterminal spines Jonger 
and stoutet, 
Length 8:8 mm. Type in South Australian Museum, Reg. No, C_ 2676. 
Ovigerous female. C—(slender form). In striking contrast to the robust 
variety, this differs from the type in the extremely elongate carapace, which is 
three times as long as deep, and twice as long as greatest width, The pseudo- 
rostruin is long, subtrimieate in front, with the lobes mecting for a distance equal 
to about one-sixth of length of carapace. Antero-lateral angle with three teeth, 
The basis of the first peraeopod is shorter than in the type, not quite half 
as long again as rest of limb; the basis of the seeand peraeopod, as in form B 
is likewise relatively shorter than in the type. 
The lateral margins of the telson are distinctly serrate, and the terminal 
and lateral spines slender, In the uropods the armature is as in the type, but 
as in the much larger robust variety the exopod is two-thirds as Jong as the three- 
seomentate endopod; the latter has the longer terminal spine almost as long 
as the ramus, 
Length 2°9 mm, 
Adult male. ©, Of the specimens here referred to ambigua, the only males 
belong to this smal! variety. 
Carapace one-third of total length of animal and one-third as long again ag 
pedigerous somites together ; it is two and three-fourths times as long as deep and 
ig a little wider than deep; seen from above it is only slightly broadened towards 
the rear, and viewed from the side the dorsal margin is little arched, Antero- 
lateral margin scarcely concave and antero-lateral angle with three small teeth. 
Pseudorostral lohes meeting for a distance equal to about one-fifth of length of 
carapace; the pseudorostrum is samewhat downhent, Ocular lobe not larger 
(relatively) than in female, slightly constricted at base. 
Second and fourth somites markedly longer on back than the others; second 
well-produced anteriorly on sides, where its lobe generously overlaps first somite ; 
third and fourth somites extended markedly backwards on sides, the second and 
third peraeopods separated by a wide interspace. 
