DECAPOD A. 



bead-piece, gives it the resemblance of a black head with a crown of silver on the brow. 

 This appearance is heightened in no small degree by three rugged prominences one in 

 the centre, and another on each side, on the upper part; and by the minute black eyes, 

 which, like those of most spiders, sparkle with the lustre of small gems. These eyes 

 are eight in number, four are placed immediately in the front of the silver-coloured 

 circular front piece, and on each side are two placed close together thus : .. : 



The body is really beautiful, the chief colour is deep brown, strongly tinged with 

 bright purple; a broad stripe of orange colour passes down the abdomen from the 

 cephalo-thorax to the apex : the whole is elegantly marked with a variety of cream- 

 coloured lines and spots intersecting each other. Very little hair is found on any part 

 of this spider except on the cephalo-thorax, which being rubbed off, discovers a hard 

 testaceous black substance beneath. 



The description given by Fabricius accords in every respect with our specimen. 

 The only insect with which it could possibly be confounded is Aranea Pilipes, which 

 also has never been figured ; it differs, however, from Aranea Maculata in the very hairy 

 clothing of the legs, and it has also two silver stripes down the back : a striking specific 

 distinction to separate it from our insect. It is also a native of the East Indies, but not 

 of China, that we are informed. 



Order. DECAPODA. Latreille. 



ORITHYIA MAMILLARIS. 



Plate 48. 

 Class. Crustacea, Cuvier. Aptera p. Linnceus. 

 Order. Decapoda, Latreille. 

 Section. Brachyura, Latreille. 

 Family. Portunid/e. 

 Genus. Oiuthyia. Fabricius. Cancer p. Linn. Donov. 



Cii. Sp. O. testa utrinque trispinosa, tabcreulata, maculis duabus rufis, fronte tridentato 



Long. test. \\ unc. 

 O. with the carapax having three spines on each side and tuberculated, with two red 



spots, the front tridentate. Length 1^ inch. 

 Syn. Cancer mamillaris, Fabr. Eut. Syst. 2. 405. 91. 



It is worthy of remark, that this is the only species of the old genus C 

 Fabricius mentions as a native of China. 



oncer, which 



