80 AUSTRALIAN MAIACOSTEACA. 



orbit. Anterior legs armed with spines. Fifth pair of legs 

 with a spine upon the inferior margin of the thigh. 



135. Thalainita sima. 



Thalamita sima, M.-Edw., Hist. Nat. Crust., i., p. 460 (1834) ; 

 A. M.-Edw., Now. Arch, du Mus. ix., p. 359 (1861) ; Miers, 

 Cat. Crust. N.Z., p. 28 (1876). 



Thalamita arcuatus, De Haan, Paun. Japon., Crust., p. 43, 

 pi. ii., fig. 2, and pi. xiii., fig. 1 (1835). 



Carapace clothed with short hairs and with prominent naked 

 transverse lines. Antero-lateral margins five-toothed, the fifth 

 tooth slightly longer than the rest. Eront four-toothed, the two 

 median teeth very wide, and separated by a very narrow median 

 fissure, the two lateral much smaller, with the front margin 

 arcuate. Basal joint of the antennse with a smooth entire ridge. 



Eastern Coast. 



136. Thalamita Stimpsoni. A.M. 



Thalamita Stimpsoni, A. M.-Edw., Nouv. Arch, du Mus., t. x. 

 p. 362, pi. xxxv., fig. 4. 



Carapace with prominent transverse lines sometimes clothed 

 with short hairs, sometimes nearly naked. Eront with six broad 

 rounded teeth (not including the internal orbital angle). Antero- 

 lateral margins with five prominent acute teeth, of which the 

 fourth is usually shorter than the rest. Basal joint of the 

 antennse with a granulated ridge. 



Port Denison, etc. Found also in New Caledonia. 



137. Thalamita prymna. 



Cancer prymna, Herbst, Krabben u. Krebse, pi. Ivii., fig. 2. 



Thalamita prymna, Milne-Edwards, Hist. Nat. des Crust., i. 

 p. 461 ; De Haan, Paun. Japon., Crust., p. 43, pi. xii., fig. 2 ; 

 A. M.-Edw., Nouv. Arch, du Mus., t. x., p. 360. 



Thalamita crassimana, Dana, U.S. Explor. Exped., Crust., i., 

 p. 284, pi. xvii., fig. 4. 



A near ally of the preceding, but distinguished from it by 

 having a row of sharp spines on the basal joint of the antennee. 



