OF NEW ZEALAND. 15 
HETEROZIUS. 
Heterozius, Alph. M. Edw. Ann. Soc. Ent. France (ser. 4) vi, 
p. 275, (1867). 
Carapace rounded in front, very greatly depressed. Front narrow 
and prominent. Basal joint of the external antenne not reaching the 
front. Third joint of the external maxillipeds very small and narrowed 
anteriorly. Endostome not canaliculated. Abdomen five-jointed. 
14. Heterozius rotundifrons. 
Feterozius rotundifrons, A. M. Edw. Ann, Soc. Ent. France (ser. 4) 
vil, p. 275, (1867). 
Carapace flattened, entirely smooth, except for a groove, which 
defines the hepatic region behind, and extends in a straight line at a 
little distance from the margin towards the cardiac region. Latero- 
anterior margins very long, so that a straight line joining their posterior 
angles would divide the carapace into two unequal parts, of which the 
anterior would be much the larger. They form a regular curve with 
the front, are entire, and have two small fissures behind, of which the 
anterior is continuous with the sub-hepatic groove, and obscurely 
defines two lobes, Front narrow, prominent, rounded in the middle, 
where it is divided by a narrow fissure of little depth. Basal joint of 
the external antenne so small that the latter are scarcely separated 
from the fossettes of the inner antenne. Inferior surface of the body 
and legs covered with a very short down. Anterior legs subequal. 
Hand smooth, and rounded above, and presenting within, near the 
articulation with the wrist, a large tubercle. Fingers long, slender, and 
nearly straight. (A. M. E.). 
New Zealand (Coll. Brit. Mus.). 
Occasionally, in male specimens, the sub-hepatic groove and the 
notch in the centre of the front are absent, and the hands very unequal. 
There is sometimes a longitudinal groove upon the outer surface of the 
hand, the tubercle on the inner surface varies greatly in size and shape. 
The specimens described by M. A. Milne Edwards are from New 
Caledonia, 
ACT ABA, 
Cancer, M. Edw. (part) Hist. Nat. Crust. i, p. 8372, (1834). 
AXantho, M. Edw. (part) Hist. Nat. Crust. i, p. 887, (1834), 
