1900.J FROM SINGAPORE AND MALACCA. 723 



VI. Genus Egeeia Latr. 



7. Egeria arachnoides Eumph. 



Cancer arachnoides, Rumph. D'Amboin. Rarit-kainmer, pi. viii. 

 f. 4 (1741). 



Inachtis longipes, Fabr. Suppl. p. 358 (1798). 



Egeria arachnoides, Latr. Encycl. pi. cclxxxi. f. 1 (1825) ; 

 M.-Edw. Hist. Nat. Crust, t. i. p. 291 (1834) ; Hasw. Cat. Austr. 

 Crust, p. 11 (1882); Miers, ' Alert ' Crust, p. 191 (1884). 



Egeria longipes, Walker, Journ. Linn. Soc, Zool. vol. xx. p. 109 

 (1887). 



Egeria arachnoides, Henderson, Trans. Linn. Soc, Zool. vol. v. 

 p. 343 (1893). 



Hob. Singapore ; 2-4 fms. Muddy bottom. One male, rather 

 damaged, and another larger. 



Dim. 6 6x7. S 16x16. 



VII. Genus Mai a Lam. 



8. Maia miersii Walker. 



Maia miersii, Walker, Journ. Linn. Soc, Zool. vol. xx. p. 113 

 pi. vi. ff. 1-3 (1887). 



Hob. Singapore ; 6 fms. Bottom of sandy mud. One female 

 example, entirely agreeing with Mr. Walker's description. The 

 carapace is thickly covered with matted weed, in which are 

 entangled tiny shells, gravel particles, &c, as well as mud, when 

 first caught. 



Dim. 16-5x21-5. 



VIII. Genus Hyastenus White. 



9. Hyastenus diacanthus de Haan. 



Pisa (Naxia) diacantha, de Haan, Crust. Jap. p. 86, pi. xxiv. 

 f. 1 (1839). 



Hyastenus diacanthus, A. M.-Edw. Nouv. Arch. Mus. t. viii. 

 p. 250 (1872) ; Hasw. Cat. Austr. Crust, p. 20 (1882) ; Miers, 

 'Alert' Crust, p. 194 (1884). 



Hah. Malacca ; 6 fms. Rough bottom. 3 small females. 



Dim. $5x7*5. $4x5-5. $ 2-5 x 3*5. 



9 «. Hyastenus diacanthus bituberculatus, var. nov. 



There are, in addition to the above, three large specimens, in 

 which the gastric prominence, besides being much elevated, bears 

 two pointed tubercles, one in front of the other, the anterior being 

 the more prominent ; a small tubercle on tho middle of the posterior 

 border. In other respects they resemble H. diacanthus. There 

 are three examples, a male and a female from 15 fms. at Singapore, 

 and another female from 10-15 fms. at Malacca. In the female 

 from Singapore there is a biggish round brown spot on the posterior 

 declivity of the gastric eminence. 



Dim. 6 15x21. $18-5x25. $12-5x18. 



