1900.] FROM SINGAPORE AND MALACCA.. 767 



Hab. Singapore : 12 fms., rough bottom ; south of Blakang 

 Mati island. One male. 



I quite concur with Mr. Alcock in the separation of this species 

 from the next, and its identification with Herbst's form. This 

 specimen lacks the red colouring of his Indian examples, being 

 only of a rather dark, yellow-brown hue. 



Dim. 9-5x7-75. 



111. Nursia hardwickii Leach. 



Nursia hardwickii, Leach, Zool. Misc. iii. p. 20 (1817) ; M.-Edw. 

 Hist. Nat. Crust, t. ii. p. 137 (1837). 



Nursia plicata, Bell, Trans. Linn. Soc. vol. xxi. p. 307, pi. xxxiv, 

 f. 4 (1855). 



Nursia plicata ?, Miers, Trans. Linn. Soc. ser. 2, Zool. vol. i. 

 p. 240, pi. xxxviii. f. 28 (1877). 



Nursia plicata, Hslsw. Cat, Austr. Crust, p. 127 (1882); ? "Walker, 

 Journ. Linn. Soc, Zool. vol. xx. p. Ill (1887) ; Henderson {fide 

 Alcock), Trans. Linn. Soc, Zool. vol. v. p. 404 (1893). 



Nursia hardwiclcii, Alcock, Jouru. As. Soc Bengal, vol. lxv. 

 pt. ii. No. 2, p. 181 (1896). 



Hab. Singapore: 6-10 fms., roiish bottom ; from both north 

 and south side of Blakang Mati island. A male and a female. 



Bather yellow than, like Mr. Alcock's examples, flesh-coloured. 



It is interesting to find this species living together with the 

 closely-related N. plicata. 



Dim. S 10-5x9-5. $9-75x8-75. 



LXIII. Genus Oreophorus Biipp. 



112. Oreophorus rugosus Stimpson. 



Oreophorus rugosus, Stimpson, Proc Ac. Nat. Sci. Philad. p. 259 

 (1858)"; A. M.-Edw. Ann. Soc Entom. Er. t. v. p. 152, pi. vi. 

 f. 3 (1865); id. Nouv. Arch. Mus. t. x. p. 49 (1874): Hasw. Cat. 

 Austr. Crust, p. 130 (1882). 



Hab. Singapore : a male from 2-3 fms., muddy bottom, and a 

 female from the reef. 



Dim. 6 13x9. ? 18-5x14. 



LXIV. Genus Favus \ gen. nov. 



Carapace twice as broad as long, extended laterally so as quite 

 to conceal the 2nd, 3rd, and 4th pairs of legs in flexion, but 

 suddenly narrowed behind so as to leave the whole of the posterior 

 pair exposed ; front small and upturned ; antennules obliquely 

 folded ; antennae with flagellum either very rudimentary or 

 completely absent, and basal portion imbedded in the inner orbital 

 angle and fused with the orbital margin ; orbits, in consequence, 



1 Favus— & honeycomb. 



