BRACHTUEA FEOM TORRES STRAITS. 19 



flattened posteriorly and is usually strongly arched from side to side. Dr. De Man has 

 suggested to me a possil)le relationship with the genus Lophoxmithns. In that "-enus, 

 however, the carapace is usually depressed and glabrous, and though Miss Eathlnin has 

 recently described a species L. frontalis (Proc. U.S. Nat. Mus. xvi. 1893, p. 23G) formino- 

 an exception in both these respects, it does not appear to draw appreciably nearer to 

 the present form. The whole aspect of our species, the shape of the front, and many 

 other small points are so suggestive of Filumnus that it seems best, for the present at 

 any rate, to include it in that genus, tliougli it certainly diverges considerably from the 

 more typical species. 



Length of carapace 20 ram. Length of chela 18 mm. 



Breadth „ 28 „ „ dactylus 8 „ 



Length of larger cheliped 31 ,, „ last leg 30 „ 



Locality. " Fringing reef, Mabuiag." 



AcTUMjrus SETiFER (De Haan). 



Pilumnus setifcr, De Haan, Faun. Japon., Crust, p. 50, pi. iii. fig. .3. 



Actttmnus setifer, A. Milne-Edwards, N. Arch. Mus. P.iris, i. p. 287, pi. xv. figs. 5-.") 6 (18G5) ; 

 Alcock, Journ. Asiatic See. Bengal, Ixvii. (2) p. 202 (1898). 



Our four specimens show considei-ablc variation in several points, l)ut must all, I think, 

 ])e referred to this common and widely distributed species. The smallest specimen is a 

 female, and, although only 6'25 mm. in length, carries eggs. In this individual the 

 lobulation of the carapace is not very pronounced, and the antero-lateral teeth are 

 prominent and tipped with spiniform tubercles. In some of the larger specimens the 

 lobules of the carapace are more prominent, the carapace is more convex, and the antero- 

 lateral teeth are reduced to low, rounded lobes, on wliich the minute spiniform points 

 are completely hidden by the dense pubescence covering the whole carapace. These 

 differences, as well as slight variations in the relative breadtli of the carapace, appear to 

 be independent of age or sex. In a very large male, 17'5 mm. in length, from Sagami 

 Bay, Japan, in the Museum of University College, the antero-lateral spines are very 

 distinct, and the lobulation of the carapace is less pronounced than in a specimen only 

 7 mm. long in Prof. Haddon's collection. 



Localities. " Flinders Entrance, near Mer, 20-30 fatli." ; " S. of Orman's reef, 

 5-7 fath." 



Trapezia feretjginea, var. areolata (Dana). 



Trapezia ferrvginea areolata, Ortmann, Zool. Jalirl). Syst. x. p. 206 (with synonymy) ; Alcock, Jour-;. 

 Asiatic Soc. Bengal, Ixvii. (2) p. 221 (1898). 



One specimen, an ovigerous female about 10 mm. in length, having the lateral teeth 

 of the carapace acute. De Man has pointed out (Arch. Naturg. liii. (1) p. 317) that this 

 juvenile character is occasionally retained in adult individuals, though as a rule these 

 teeth become obtuse (var. iy/^;'>M«s, A. M.-E., N. Arch. Mus. Paris, ix. p. 259, pi. x. fig. (5). 



8* 



