
152 RECORDS OF THE S.A. MUSEUM 
Loe, South Australia: Backstairs Passage, Page Islands, 9 fath. (K, Sheard, 
submarine light, ApL, 1941), Types in South Australian Museum, Reg. No. C. 
2614 and 2616. 
Adult male (reticulate form), A male taken with that teeorded above has so 
many teatures in common with il that there ean be little donbt that it represents a 
different form of this sex in the same species. The pedigerous somites, pleon and 
the appendages are as described, exeepting that the dorsal tubercles are somewhat 
more prominent and the endopod of the uropod is relatively a trifle shorter, al- 
though it is otherwise exactly similar, with the three unequal distal spines, ser- 
rated inner edge, ete. ‘The sculpture of the carapace, however, is very different. 

Fig. 3. Nannastaris inconstans, adult male, reticulate form; lateral view and eephalothorax 
from above (x 59); 8., sculpture of integument over branchial region (* 185). 
The branchial regions are more inflated and the surface of the integument here 
is tuarked with a distinet reticulate patterning (at §., fig. 2 and 3, the sculpture 
of the two varieties is to the same seale). There are no erests of tubercles on the 
dorswn, which bears scattered granules, vaguely arranged in Jongitudinal series be- 
hind the eyes, and there are no tumidities posterior to the eyes. 
Length 1:35 mm. 
This species is distinguished by the wide pedigerous somites and the armature 
of the pleon, plus the long posterior peraeopods and the character of the urvopods. 
NANNASTACUS CLAVATUS Sp. Nov. 
Adult male, Integument of back and sides studded with large, distally dilated 
oranwles; a charaeteristic armature of dorsal tubercles on second to fifth pediger- 
ous and first to fifth pleon somites ; very sparse hairs, 
Carapace distinctly more than one-third of total length of animal; it is less 
than twice as long as deep and not depressed, the width being equal to depth; 
seen from above it is Suboval!l in shape, widest at about middle of length; dorsum 
as seen from the side almost evenly curved, except for a slight angularity in 
front of eyes, Antero-lateral margin shallowly concave; antero-lateral angle 
rounded and armed below with a single small tooth. Pseudorostral lobes meei- 
ine above and below for whole length; anteriorly they are subtruneate as seen 
from above, rounded and with a few teeth in lateral view. 
First pedigerous somite shorter than second and partly concealed ; second to 
fourth somites with pleural parts broadly expanded, grannlate; on the back the 
second and third each bear a pair of curved, distally dilated, lurge tubercles, the 
