REPORT ON THE BRACHYURA. 
199 
Thalamita crenata, Elippell. 
Thalamita crenata , Riippell, Beschreib. u. Abbilcl. 24 kurzschwanzigen Krabben d. rotben 
Meeres, p. 6, pi. i. fig. 2, 1830. 
,, „ Milne Edwards, Hist. Nat. Crust., vol. i. p. 461, 1834. 
,, „ A Milne Edwards, Arcbiv. Mus. Hist. Nat., vol. x. p. 365, 1861, and 
references to literature. 
Albany Island, Cape York (an adult ova-bearing female). 
Adult $ . 
Lines. 
Millims. 
Length of carapace, about 
181 
39 
Breadth of carapace, about 
251 
53-5 
This form, when fully grown, is one of the largest of the group. Thalamita danae, 
Stimpson, and Thalamita cceruleipes, Jacquinot and Lucas, are perhaps mere varieties of 
this species. 
Subfamily 3. CarciniN/E. 
Portunus, Fabricius. 
Portunus, Fabricius (pt.), Entom. Syst, Suppl. (1), p. 363, 1798. 
„ Milne Edwards (pt.), Hist. Nat. Crust., vol. i. p. 439, 1834. 
„ A. Milne Edwards (pt.), Arcbiv. Mus. Hist. Nat., vol. x. p. 392, 1861. 
Liocarcinus (subgenus), Stimpson, Bull Mus. Comp. Zool., vol. ii. p. 146, 1870, footnote. 
Carapace moderately transverse, depressed, with the lateral margins arcuated, and 
armed with five regular and even teeth ; the front of moderate width, and divided into 
several lobes or teeth, which are not very prominent ; and the last tooth scarcely, if at 
all, exceeds the preceding one in length ; the orbits are not large, and possess two 
fissures in the superior, and one or two in the inferior margin. The ridges of the 
endostome or palate are not always developed. The post-abdomen is five-jointed (the 
third to the fifth segments consolidated). The eyes are set on very short, thick pedicels. 
The basal joint of the antenna is short and but little dilated, it is generally united with 
the frontal margin, but does not always completely fill the interior hiatus of the orbit. 
The ischium of the exterior maxillipedes is not produced at its antero-internal angle, the 
merus is distally truncated or very slightly rounded, with the antero-internal angle 
scarcely, if at all, emarginate, and the antero-external angle not produced. The chelipedes 
are subequal and moderately developed ; the arm or merus is smooth, without spines, 
carpus or wrist with a strong spine on its inner margin, palm with a spine near to the 
distal extremity of the superior margin, and usually somewhat indistinctly costated on 
the exterior surface. Ambulatory legs of moderate length, with the dactyli styliform ; 
fifth or natatory legs with the penultimate and terminal joints dilated and compressed, 
the terminal joint ovate, as in other Portunidse. 
