CBXJSTACEA 01" THE MEEGTJI AECHIPELAaO. 79 



state of the fourth antero-lateral tooth, but entirely agreeing 

 in all other characters. 



The shape of the male abdomen is also characteristic of 

 T. Dance. 



The Leyden Museum contains specimens of TJialamita Dance 

 from Amboina, Waigiou, Timor, Ceram, and Padang; and it 

 has also been recorded from Auckland by Heller, from Hong- 

 kong and Java by Stimpson and Milne-Edwards, and from 

 Mozambique by Hilgendorf. 



55. Thalamita CKEisrATA, Latr. 



Portunus crenatus, Laireille, Collection du Museum. 



Thalamita crenata, Ruppell, Krabben des Rothen Meeres, 1830, p. 6, 

 Taf. i. fig. 2 ; Milne-Edwards, Hist. Nat. des Crustaces, p. 461 ; Stimpson, 

 I. c. p. 37 ; Alph. Milne-Edwards, Archives du Museum Hist. Nat. 1861, 

 t. X. p. 365, and Nouv. Arch, du Museum Hist. Nat. 1873, t. ix. p. 166 ; 

 Hilgendorf, Monatsber. k. AJcad. d. Wiss. Berlin, 1878, p. 800. 



One male specimen was collected at King Island. 



The distance between the last antero-lateral teeth measures 

 60 millim. Thalmnita crenata is sharply defined and distin- 

 guished from the preceding species by the absence of longitudinal 

 crests and granulations on the outer and inner surfaces of the 

 hands, which are very convex and nearly wholly smooth. As 

 regards the shape of the cephalothorax, and more especially the 

 shape of the frontal lobes, these two species, however, almost 

 completely agree with one another. 



Thalamita crenata is represented in the Leyden Museum by 

 specimens from the Eed Sea, from the island of Nossy-Ealy, 

 near Madagascar, from the Moluccas, Bauda, Waigiou, Timor, 

 and Macassar; also by specimens from the shores of Padang, 

 Sumatra. 



This species is, moreover, recorded from the coasts of China, the 

 Loo-Choo Islands, Pondicherry, Java, the Nicobar Islands, and 

 Mozambique. It seems, therefore, to be distributed throughout 

 the whole Indo-Pacific B,egion from the E-ed Sea and Mozam- 

 bique as far as the shores of China and the Marquesas group. 



G-enus GrONiosoMA, ^Zp/i. Jf.-^^z«. 



56. Gr02fiosoM:A CEUcirERiTM, Fair. (PL V. fig. 1.) 

 Portunus crucifer, Fabricius, Suppl. Entom. Syst. p. 364. 

 Thalamita crucifera, Milne-Edwards, Hist. Nat. Crustaces, i. p. 462. 



