536 ME. W. P. LAKCHESTEE OX THE [Dec 3, 



The points of the rostral horns are sharply curved upwards and 

 inwards in tins specimen. A typical form, with a single spinule 

 at the base of each rostral spine. 



Dim. 22x25. 



Breadth taken between bases of penultimate lateral teeth. 



III. Genus Hxastenus White. 



3. Hyastenus diacanthus de Haan. 



Pisa (Ncuvia) diacantha, de Ilaan, Crust. Jap. p. 80, pi. xxiv. 

 fig. 1 (1839). 



ffyastenus dincanthus, Miers, 'Alert' Crust, p. 194 (1884); 

 de Man, Arch.f. Naturg. liii. i. p. 220 (1887) ; Alcock, Journ. As. 

 Soc. Bengal, lxiv. 2, p. 210 (1890). 



Loc. Trengganu. 



A fine female with ova. 



Carapace creamy-coloured, splashed with red ; two, quite low, 

 tubercles on the gastric eminence, one in front of the other, and a 

 very low one, hardly distinct, on the uro-cardiac region. Also 

 another low tubercle, situate on the anterior branchial region a 

 little in front of a line joining the epibranchial spine and posterior 

 gastric tubercle, and lying a little nearer the former than the 

 latter. 



Dim. 20-5x34-5. 



IV. Genus Micippa Leach. 



4. Micippa mascarenica Kossmann. 



Micippa philyra, Leach, Zool. Misc. iii. p. 10 (1817) (nee M. 

 philyra, Herbst). 



Micippa philyra, var. mascarenica, Kossm. Zool. Ergebn. p. 7, 

 pi. iii. fig. 2 (1877). 



Micippa mascarenica, Miers, Ann. Mag. Nat. Hist. (5) xv. p. 7 

 (1885) ; Lanchester, P. Z. S. Lond. p. 725 (1900). 



Loc. Pulau Bidan, Penang. 



A full-grown male ; of the legs only one chelipede remains. 

 There are six teeth present behind the postorbital tooth. Mobile 

 portion of antenna a little less than half the length of the carapace, 

 second joint just one-quarter breadth of rostrum at its own point of 

 origin. The single chelipede is quite smooth, except for a few 

 separate and minute granules on the distal portion of the upper 

 margin of the arm. The fingers meet along their distal half. 



Dim. 24x28. 



Breadth taken between bases of penultimate lateral teeth. 



V. Genus Lambrus Leach. 



5. Lambrus longimanus Linn. 



Cancer longimanus, Linn. Syst. Nat. (ed. xii.) p. 1047 (1760). 



Lambrus longimanus, M.-Edw. Hist. Nat. Crust, i. p. 354 (1834); 

 Miers, Ann. Mag. Nat. Hist. (5) iv. p. 20 (1879); Alcock, Journ. 

 As. Soc. Beng. lxiv. 2, p. 260 (1896). 



