OF NEW ZEALAND. 29 
380. Thalamita dane. 
Thalamita crenata, Dana, U.S. Explor. Exped. xiii, Crust. part i, 
p. 282, pl. xvu, fig. 7, (1852), nec. Latr. 
Thalamita. dane, Stimpson, Proc. Acad. Nat. Sci. Philad. p. 37, 
(1858); Alph. M. Edw. Archiv. Mus. Hist. Nat. x, p. 366, pl. xxx, 
fig. 1, (1861). 
hill g9 
Carapace very much flattened, with strongly marked transverse 
lines. Latero-anterior margins with five acute teeth, the fourth and 
fifth rather smaller than the rest. Front divided into eight flat, 
truncated lobes, of which the external are widest and arcuate. 
Basal joint of the external antenne with a granulated ridge. Anterior 
lees rather slender, arm with usually three spines upon its front 
margin. Wrist slightly granulous, with a large spine at its antero- 
internal angle, and two or three spinules upon its outer surface. Hand 
with five spines placed alternately on the inner and outer margin of 
its upper surface, and externally marked with prominent granulated 
longitudinal ridges. Colour, reddish yellow. Length 1} in.; breadth 
22in. (A.M. E.). 
Auckland (Heller). 
Also found on the coasts of China and Japan, and at Samarang, 
NECTOCARCINUS. 
Portunus, M. Edw. (part) Hist. Nat. Crust. i, p. 445, (1834). 
Nectocarcinus, Alph. M. Edw. Ann. Sci. Nat. (ser. 4) xiv, p. 220, 
(1860); Archiv. Mus. Hist. Nat. x, p. 404, (1861). 
Carapace thick, scarcely convex. Latero-anterior margins four 
toothed, regions well marked. Front prominent, entire or lobed. 
Orbits small. Basal joint of the external antenne straight, narrow, 
and uniting with the front. Basal joint of the imternal antenne very 
large. External maxillipeds elongate, with the third joint notched on 
the inner side. Anterior legs short and robust. Sternal plate with a 
median suture which extends over only the last two joints. Abdomen 
of the male four-jointed, the third, fourth, and fifth joints coalescent, 
and forming a single mass. 
This genus is the representative in Southern Seas of Portunus of 
the northern hemisphere, from which it is at once distinguished by 
having only four teeth on the antero-lateral margins of the carapace. 
