122 
The chelipeds in the male are of moderate size, the hand 
is short and rather tumid, the fingers are short, narrow, and 
evenly dentate. The arm is provided with a distal tooth 
above, and there are faint indications of two more further 
back. The carpus is strongly keeled with a minute tooth at 
the proximal end. 
The sub-hepatic tubercle is spiniform, and points for- 
ward. 
The penultimate joints of the posterior pair of ambula- 
tory legs are nearly as much expanded as in //. truncatij)e.s. 
This is a shallow water species, St. Vincent Gulf. 
Length of carapace, 18 mm. 
Breadth of carapace, 13 mm. 
Length of rostral horn, 3 mm. 
Inter-ocular space, 5 mm. 
Length of chelipeds, 15 mm. 
Length of first ambulatory leg, 17 mm. 
Specimens in Adelaide Museum. 
Halimus tumidus, var. gracilipes, n. var. PI. xxiii., fig. 5. 
Carapace very convex. Rostral horns rather slender, 
well depressed, and divergent, more so from their distal 
halves, but little vertically compressed. The upper orbital 
border is anteriorly tuberculate, but not so nearly spiniform 
as in H. t run rati pes, the posterior end bears a small, acute 
tooth, the intermediate spine is well developed and acute, 
separated from the preceding tooth by a narrow V-shaped 
cleft, while it is separated from the post-ocular by a much 
wider space. The post-ocular spine is long, inclined forwards, 
and is slightly sigmoid in shape. The hepatic region bears a 
small conical spine. The three lateral spines of the branchial 
region are moderately developed. The inter-ocular space has 
two strong conical tubercles, with a smaller one in advance of 
each ; the space between these pairs is somewhat concave, ex- 
tending forwards to the base of the rostral horns. Five gastric 
tubercles are arranged in the usual manner, and are well 
marked ; four or six more lateral ones less distinctly. There 
are two, very small, on the urogastric region. The cardiac 
region consists of two elevations, each bearing three small 
tubercles, and behind these there are three median, sub-acute, 
and well-defined, including one on the posterior border, which 
is slightly turned up at the apex and slightly bifid. The epi- 
branchial regions are slightly tumid, each bearing two small 
tubercles, arranged obliquely, and there are nine or ten more 
on each branchial region (omitting the lateral spines) more 
or less developed. There are two or three very small tubercles 
on each hepatic region. Apart from the tubercles, the sur- 
