TO INDIAN CAllCINOLOGY. 133 



characters vary. De Man has more recently described a variety amboinensis in which 

 the lower cardial spine is wantin". 



Distribution. N. Australia {2Hers) ; Amboina {De Man) ; Singapore ( Walker) ■ 

 Mergui [De Man). 



Group ^V. S T A CI D E A. 



Genus Thenus, Leach. 



244. Thenus obientalis (Fabr.). 



T. orientaUs (Fabr.), Milne-Edwards, Hist. Nat. Crust, t. ii. p. 286 (1837). 



Common at Madras and on the South. Indian coast generally {J. R. II.). 



The three teeth in the mid-dorsal line of the carapace are prominent and subacute in 

 young individuals, l)lunt and ill-defined in adults. 



Distribution. Madagascar, Seychelles, Indian Seas, Malay Archipelago, China, W. 

 Australia. 



Genus Panulirus, Gray. 



245. Panulirus ornatus (Fabr.). 



PaUnurus ornatus (Fabr.), Milne-Edwards, Hist. Nat. Crust, t. ii. p. 29G (1837). 

 Panulirus ornains (Fabr.), Stimpson, Proc. Acad. Nat. Sci. Philad. Jan. 1860, p. 21. 

 Senex ornatus (Fabr.), Ortmanu, Zool. Jahrb. Bd. vi. AlDth. f. Syst. p. 31 (1892), vbi synon. 



Ceylon {Rain). 



Distribution. From E. Africa to Japan, N. Australia, and the Pacific (Samoa). 



246. PANULiRirs PENICILLATUS (Olivier). 



PaUnurus penicillatus (Oliv.), ^Milue-Edwards, Hist. Nat. Crust, t. ii. p. 299 (1837). 



Panulirus penicillatus (Oliv.), Stimpson, Proc. Acad. Nat. Sci. Pliilad. Jan. 1860, p. 24. 



Sene.r penicillatus (Oliv.), Ortmann, Zool. Jalirb. Bd. vi. Abtb. f. Syst. p. 28 (1892), ubi synon. 



Ceylon (Hal//). 



Distribution. From the Pi.ed Sea and Mauritius to the Malay Arclupclago, X. 

 Australia, and the Pacific (Fijis, New Hebrides, Tahiti). 



247. Panulirus dastpus (Latr.). 



PaUnurus dasypus (Latr.), Milne-Edwards, Hist. Nat. Crust, t. ii. p. 300 (1837). 



Senex dasypus (Latr.), Ortmann, Zool. Jalirb. Bd. vi. Abth. f. Syst. p. 33, (1892), uhi synon. 



Silavaturai Par (Thu7:^ton). Common at Madras (J. 11. II.). 



The Silavaturai example is very young, measuring only 45 mm. in length, but is appa- 

 rently referable to this species. It has two pairs of spines, arranged as if at the angles 

 of a square, on the antennal segment, the posterior pair being smaller than tlie anterior 

 pair ; at a later stage small spinules are developed towards tlie centre of tlie square. 



Distribution. Indian Ocean {Milne-Edicards) ; Ceylon and Madras (Heller) ; Muscat 

 (Drit. Mas.) ; Moluccas (Her/dot). 



