REPORT ON THE BRACHYURA. 
195 
Thalamita integrct, Dana. 
Thalamita Integra, Dana, Proc. Acad. Nat. Sci. Philad., p. 85, 1852; U.S. Explor. Exped., 
vol. xiii., Crust. 1, p. 281, pi. xvii. fig. 6, 1852. 
,, „ A. Milne Edwards, Archiv. Mus. Hist. Nat., vol. x. p. 358, 1861. 
Honolulu. Several specimens, males, were taken on the reefs, and one purchased in 
the market. 
Adult £ . Lines. Millims. 
Length of carapace, . . . . . . . 14^ 30 "5 
Breadth of carapace, about ...... 22 47 
The smoothness of the basal antennal joint and of the exterior surface of the palms of 
the chelipedes are sufficient, apparently, to distinguish adult examples of this form from 
its near ally, Thalamita admete. 1 
Thalamita sima, Milne Edwards. 
Thalamita sima, Milne Edwards, Hist. Nat. Crust., vol. i. p. 460, 1834. 
„ „ A. Milne Edwards, Archiv. Mus. Hist. Nat., vol. x. p. 359, 1861. 
„ „ Miers, Crust, in Zool. Coll. H.M.S. “Alert,” p. 231, 1884. 
Portunus ( Tialamita ) arcuatus, de Haan, Crust, in v. Siebold, Fauna Japonica, p. 10, 1833, 
sine descriptions, and p. 43, pi. ii. fig. 2, and pi. xiii. fig. 1, 1835. 
South Australian Coast, 2 to 10 fathoms, April 1874 (an ova-bearing female) ; Torres 
Strait, lat. 10° 30' 0" S., long. 142° 18' 0 " E., in 8 fathoms, Station 186 (another 
female bearing ova). This latter, which is the largest example, measures as follows : — 
Adult 9 • Lines. Millims. 
Length of carapace, . . . . . . . 15 - 5 
Breadth of carapace, nearly . . . . . . 11 23 
§§ Thalamitx with Six-lobed front. 
I place in this new section of the genus two species which are of much interest as 
being intermediate between the typical Thalamitse and the genus or subgenus Thala- 
mitoides, A. Milne Edwards . 2 
They agree with the latter in their six-lobed front, but are distinguished by the much 
lesser width of the carapace and less numerously spined palms of the chelipedes, points 
wherein they altogether resemble the other species of Thalamita. Should intermediate 
forms occur, it may be found more convenient to unite the species of this section to 
Thalamitoides. 
1 In some small specimens, however, and particularly in small examples of the variety designated africana, by 
myself, from Goree Island, Senegambia, traces of ridges and granulations appear on the exterior surface of the palms of 
the chelipedes. 
2 Nouv. Archiv. Mus. Hist. Nat., vol. v. p. 146, 1869. 
