BKACHYURA FEOM TORRES STRAITS. 23 



of the outer frontal lobes, but it differs in having the other three pairs of lobes separated 

 only by slight notches. The abdomen does not present the peculiar outline figured by 

 De Man (7. c. fig. 9), but he has since stated that this character is not constant (Notes 

 Leyden Mus. xv. j). 285). In most other points this individual agrees closely with the 

 above described specimen a, lacking, however, the third spine on the ujoper edge of the 

 hand. A larger female specimen (31 mm. long) agrees with this, except that the fourth 

 autero-lateral tooth is a little larger. 



(c) Eight specimens, all of small size, including two ovigerous females of 8 mm. and 

 7 mm. in length respectively. The outer frontal lobes have a well-curved margin ; the 

 third lobes are narrow, rounded, and sej)arated from the second by an open notch; the 

 second or submedian lobes are very broad, about half as broad again as the median pair, 

 which they distinctly overlap ; the three inner j^airs of lobes reach to about the same level. 

 The fourth antero-lateral tooth is very minute or absent. The ridges of the hand have 

 the same arrangement as in Th. pri/mua, but on the lower half of the outer face the 

 ridges and the intervening spaces are quite smooth. The basal joint of the antenna is 

 markedly shorter than in the other specimens described above. 



These small specimens depart more widely from the typical 27i. piyimia than do the 

 other specimens, but I have failed to identify them with any of the described species. 



Localities. " Flinders Entrance, near Mer, 20-30 fath." ; " Channels between reefs, 

 Mui-ray Island, 15-20 fath." 



Thalamita admete (Herbst). 



Thalamita admete, Milne-Edwards, Hist. Nat. Crust, i. p. 459 ; Daua, U.S. Expl. Exp., Crust, i. p. 281, 



pi. xvii. figs. 5«-c; A. Milne-Edwards, Arch. Mus. Paris, x. 1861, p. 350. 

 T. Saviffinji, A. Milue-Edwards, 1. c. p. 357. 

 T. admete, Alcock, Journ. Asiatic Soe. Bengal, Ixviii. (2) p. 82 (1899). 



Three female specimens, the largest 10'5 mm. long by 11'5 mm. broad, carrying ova. 

 They appear to agree with the descriptions of Tk. Savignyi, and are very similar to 

 specimens so labelled in the British Museum. There appears, however, to be little doubt 

 that this form is only a variety of Th. admete. 



Locality. " Channel between reefs, Mer." 



Thalamita sijia, Milne-Edwards. 



Thalamita sima, Milue-Edwards, Hist. Nat. Crust, i. p. 460. 

 Portunus {Thalamita) arcuatus, De Haan, Faun, Jap., Crust, p. 43, pi. ii. fig. 2. 



Thalamita sima, A. Milne-Edwards, Arch. Mus. Paris, x. p. 359 (1861) ; De Man, Zool. Jahrb. Syst. 

 viii. p. 564 (1896) ; Alcock, Jouru. Asiatic Soc. Beugal, Ixviii. (2) p. 81 (1899). 



Six specimens, including an ovigerous female only 8'5 mm. in length, are referred to 

 this species. In the larger specimens (20 mm. long) the antennal crest is smooth or 

 nearly so, but in the smaller it is minutely granulated. In none are the margins of the 

 median frontal lobes concave as described by De Man. 



Localities. "Fringing reef and shore, Thursday Island"; " Channel between reefs, 

 Murray Island." 



